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7
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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 */
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9
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10 /*
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11 * ex_eval.c: functions for Ex command line for the +eval feature.
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12 */
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13
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14 #include "vim.h"
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15
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16 #if defined(FEAT_EVAL) || defined(PROTO)
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17
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18 static void free_msglist __ARGS((struct msglist *l));
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19 static int throw_exception __ARGS((void *, int, char_u *));
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75
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20 static char_u *get_end_emsg __ARGS((struct condstack *cstack));
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7
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21
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22 /*
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23 * Exception handling terms:
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24 *
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25 * :try ":try" command \
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26 * ... try block |
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27 * :catch RE ":catch" command |
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28 * ... catch clause |- try conditional
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29 * :finally ":finally" command |
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30 * ... finally clause |
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31 * :endtry ":endtry" command /
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32 *
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33 * The try conditional may have any number of catch clauses and at most one
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34 * finally clause. A ":throw" command can be inside the try block, a catch
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35 * clause, the finally clause, or in a function called or script sourced from
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36 * there or even outside the try conditional. Try conditionals may be nested.
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37 */
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38
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39 /*
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40 * Configuration whether an exception is thrown on error or interrupt. When
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41 * the preprocessor macros below evaluate to FALSE, an error (did_emsg) or
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42 * interrupt (got_int) under an active try conditional terminates the script
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43 * after the non-active finally clauses of all active try conditionals have been
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44 * executed. Otherwise, errors and/or interrupts are converted into catchable
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45 * exceptions (did_throw additionally set), which terminate the script only if
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46 * not caught. For user exceptions, only did_throw is set. (Note: got_int can
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47 * be set asyncronously afterwards by a SIGINT, so did_throw && got_int is not
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48 * a reliant test that the exception currently being thrown is an interrupt
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49 * exception. Similarly, did_emsg can be set afterwards on an error in an
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50 * (unskipped) conditional command inside an inactive conditional, so did_throw
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51 * && did_emsg is not a reliant test that the exception currently being thrown
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52 * is an error exception.) - The macros can be defined as expressions checking
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53 * for a variable that is allowed to be changed during execution of a script.
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54 */
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55 #if 0
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56 /* Expressions used for testing during the development phase. */
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57 # define THROW_ON_ERROR (!eval_to_number("$VIMNOERRTHROW"))
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58 # define THROW_ON_INTERRUPT (!eval_to_number("$VIMNOINTTHROW"))
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59 # define THROW_TEST
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60 #else
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61 /* Values used for the Vim release. */
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62 # define THROW_ON_ERROR TRUE
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1880
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63 # define THROW_ON_ERROR_TRUE
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7
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64 # define THROW_ON_INTERRUPT TRUE
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1880
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65 # define THROW_ON_INTERRUPT_TRUE
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7
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66 #endif
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67
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68 static void catch_exception __ARGS((except_T *excp));
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69 static void finish_exception __ARGS((except_T *excp));
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70 static void discard_exception __ARGS((except_T *excp, int was_finished));
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71 static void report_pending __ARGS((int action, int pending, void *value));
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72
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73 /*
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74 * When several errors appear in a row, setting "force_abort" is delayed until
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75 * the failing command returned. "cause_abort" is set to TRUE meanwhile, in
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76 * order to indicate that situation. This is useful when "force_abort" was set
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77 * during execution of a function call from an expression: the aborting of the
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78 * expression evaluation is done without producing any error messages, but all
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79 * error messages on parsing errors during the expression evaluation are given
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80 * (even if a try conditional is active).
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81 */
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82 static int cause_abort = FALSE;
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83
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84 /*
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1214
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85 * Return TRUE when immediately aborting on error, or when an interrupt
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7
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86 * occurred or an exception was thrown but not caught. Use for ":{range}call"
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87 * to check whether an aborted function that does not handle a range itself
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88 * should be called again for the next line in the range. Also used for
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89 * cancelling expression evaluation after a function call caused an immediate
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90 * abort. Note that the first emsg() call temporarily resets "force_abort"
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91 * until the throw point for error messages has been reached. That is, during
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92 * cancellation of an expression evaluation after an aborting function call or
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93 * due to a parsing error, aborting() always returns the same value.
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94 */
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95 int
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96 aborting()
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97 {
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98 return (did_emsg && force_abort) || got_int || did_throw;
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99 }
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100
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101 /*
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102 * The value of "force_abort" is temporarily reset by the first emsg() call
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103 * during an expression evaluation, and "cause_abort" is used instead. It might
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104 * be necessary to restore "force_abort" even before the throw point for the
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105 * error message has been reached. update_force_abort() should be called then.
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106 */
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107 void
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108 update_force_abort()
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109 {
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110 if (cause_abort)
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111 force_abort = TRUE;
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112 }
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113
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114 /*
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115 * Return TRUE if a command with a subcommand resulting in "retcode" should
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116 * abort the script processing. Can be used to suppress an autocommand after
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117 * execution of a failing subcommand as long as the error message has not been
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118 * displayed and actually caused the abortion.
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119 */
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120 int
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121 should_abort(retcode)
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122 int retcode;
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123 {
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124 return ((retcode == FAIL && trylevel != 0 && !emsg_silent) || aborting());
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125 }
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126
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127 /*
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128 * Return TRUE if a function with the "abort" flag should not be considered
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129 * ended on an error. This means that parsing commands is continued in order
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130 * to find finally clauses to be executed, and that some errors in skipped
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131 * commands are still reported.
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132 */
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133 int
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134 aborted_in_try()
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135 {
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136 /* This function is only called after an error. In this case, "force_abort"
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137 * determines whether searching for finally clauses is necessary. */
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138 return force_abort;
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139 }
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140
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141 /*
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142 * cause_errthrow(): Cause a throw of an error exception if appropriate.
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143 * Return TRUE if the error message should not be displayed by emsg().
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144 * Sets "ignore", if the emsg() call should be ignored completely.
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145 *
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146 * When several messages appear in the same command, the first is usually the
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147 * most specific one and used as the exception value. The "severe" flag can be
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148 * set to TRUE, if a later but severer message should be used instead.
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149 */
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150 int
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151 cause_errthrow(mesg, severe, ignore)
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152 char_u *mesg;
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153 int severe;
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154 int *ignore;
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155 {
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156 struct msglist *elem;
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157 struct msglist **plist;
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158
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159 /*
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839
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160 * Do nothing when displaying the interrupt message or reporting an
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161 * uncaught exception (which has already been discarded then) at the top
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162 * level. Also when no exception can be thrown. The message will be
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163 * displayed by emsg().
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7
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164 */
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165 if (suppress_errthrow)
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166 return FALSE;
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167
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168 /*
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839
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169 * If emsg() has not been called previously, temporarily reset
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170 * "force_abort" until the throw point for error messages has been
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171 * reached. This ensures that aborting() returns the same value for all
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172 * errors that appear in the same command. This means particularly that
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173 * for parsing errors during expression evaluation emsg() will be called
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174 * multiply, even when the expression is evaluated from a finally clause
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175 * that was activated due to an aborting error, interrupt, or exception.
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7
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176 */
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177 if (!did_emsg)
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178 {
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179 cause_abort = force_abort;
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180 force_abort = FALSE;
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181 }
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182
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183 /*
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184 * If no try conditional is active and no exception is being thrown and
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185 * there has not been an error in a try conditional or a throw so far, do
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839
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186 * nothing (for compatibility of non-EH scripts). The message will then
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187 * be displayed by emsg(). When ":silent!" was used and we are not
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188 * currently throwing an exception, do nothing. The message text will
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189 * then be stored to v:errmsg by emsg() without displaying it.
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7
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190 */
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191 if (((trylevel == 0 && !cause_abort) || emsg_silent) && !did_throw)
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192 return FALSE;
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193
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194 /*
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195 * Ignore an interrupt message when inside a try conditional or when an
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839
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196 * exception is being thrown or when an error in a try conditional or
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197 * throw has been detected previously. This is important in order that an
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7
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198 * interrupt exception is catchable by the innermost try conditional and
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199 * not replaced by an interrupt message error exception.
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200 */
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201 if (mesg == (char_u *)_(e_interr))
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202 {
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203 *ignore = TRUE;
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204 return TRUE;
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205 }
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206
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207 /*
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208 * Ensure that all commands in nested function calls and sourced files
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209 * are aborted immediately.
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210 */
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211 cause_abort = TRUE;
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212
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213 /*
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214 * When an exception is being thrown, some commands (like conditionals) are
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215 * not skipped. Errors in those commands may affect what of the subsequent
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216 * commands are regarded part of catch and finally clauses. Catching the
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217 * exception would then cause execution of commands not intended by the
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218 * user, who wouldn't even get aware of the problem. Therefor, discard the
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219 * exception currently being thrown to prevent it from being caught. Just
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220 * execute finally clauses and terminate.
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221 */
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222 if (did_throw)
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223 {
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224 /* When discarding an interrupt exception, reset got_int to prevent the
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225 * same interrupt being converted to an exception again and discarding
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226 * the error exception we are about to throw here. */
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227 if (current_exception->type == ET_INTERRUPT)
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228 got_int = FALSE;
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229 discard_current_exception();
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230 }
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231
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232 #ifdef THROW_TEST
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233 if (!THROW_ON_ERROR)
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234 {
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235 /*
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236 * Print error message immediately without searching for a matching
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237 * catch clause; just finally clauses are executed before the script
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238 * is terminated.
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239 */
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240 return FALSE;
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241 }
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242 else
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243 #endif
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244 {
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245 /*
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246 * Prepare the throw of an error exception, so that everything will
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247 * be aborted (except for executing finally clauses), until the error
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248 * exception is caught; if still uncaught at the top level, the error
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249 * message will be displayed and the script processing terminated
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250 * then. - This function has no access to the conditional stack.
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251 * Thus, the actual throw is made after the failing command has
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252 * returned. - Throw only the first of several errors in a row, except
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253 * a severe error is following.
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254 */
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255 if (msg_list != NULL)
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256 {
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257 plist = msg_list;
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258 while (*plist != NULL)
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259 plist = &(*plist)->next;
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260
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261 elem = (struct msglist *)alloc((unsigned)sizeof(struct msglist));
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262 if (elem == NULL)
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263 {
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264 suppress_errthrow = TRUE;
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265 EMSG(_(e_outofmem));
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266 }
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267 else
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268 {
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269 elem->msg = vim_strsave(mesg);
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270 if (elem->msg == NULL)
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271 {
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272 vim_free(elem);
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273 suppress_errthrow = TRUE;
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274 EMSG(_(e_outofmem));
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275 }
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276 else
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277 {
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278 elem->next = NULL;
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279 elem->throw_msg = NULL;
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280 *plist = elem;
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281 if (plist == msg_list || severe)
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282 {
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283 char_u *tmsg;
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284
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285 /* Skip the extra "Vim " prefix for message "E458". */
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286 tmsg = elem->msg;
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287 if (STRNCMP(tmsg, "Vim E", 5) == 0
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288 && VIM_ISDIGIT(tmsg[5])
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289 && VIM_ISDIGIT(tmsg[6])
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290 && VIM_ISDIGIT(tmsg[7])
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291 && tmsg[8] == ':'
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292 && tmsg[9] == ' ')
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293 (*msg_list)->throw_msg = &tmsg[4];
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294 else
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295 (*msg_list)->throw_msg = tmsg;
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296 }
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297 }
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298 }
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299 }
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300 return TRUE;
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301 }
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302 }
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303
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304 /*
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305 * Free a "msg_list" and the messages it contains.
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306 */
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307 static void
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308 free_msglist(l)
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309 struct msglist *l;
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310 {
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311 struct msglist *messages, *next;
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312
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313 messages = l;
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314 while (messages != NULL)
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315 {
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316 next = messages->next;
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317 vim_free(messages->msg);
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318 vim_free(messages);
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319 messages = next;
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320 }
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321 }
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322
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323 /*
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324 * Throw the message specified in the call to cause_errthrow() above as an
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325 * error exception. If cstack is NULL, postpone the throw until do_cmdline()
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326 * has returned (see do_one_cmd()).
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327 */
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328 void
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329 do_errthrow(cstack, cmdname)
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330 struct condstack *cstack;
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331 char_u *cmdname;
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332 {
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333 /*
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334 * Ensure that all commands in nested function calls and sourced files
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335 * are aborted immediately.
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336 */
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337 if (cause_abort)
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338 {
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339 cause_abort = FALSE;
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340 force_abort = TRUE;
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341 }
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342
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343 /* If no exception is to be thrown or the conversion should be done after
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344 * returning to a previous invocation of do_one_cmd(), do nothing. */
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1046
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345 if (msg_list == NULL || *msg_list == NULL)
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7
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346 return;
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347
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348 if (throw_exception(*msg_list, ET_ERROR, cmdname) == FAIL)
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349 free_msglist(*msg_list);
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350 else
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351 {
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352 if (cstack != NULL)
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353 do_throw(cstack);
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354 else
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355 need_rethrow = TRUE;
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356 }
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357 *msg_list = NULL;
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358 }
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359
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360 /*
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361 * do_intthrow(): Replace the current exception by an interrupt or interrupt
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362 * exception if appropriate. Return TRUE if the current exception is discarded,
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363 * FALSE otherwise.
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364 */
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365 int
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366 do_intthrow(cstack)
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367 struct condstack *cstack;
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368 {
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369 /*
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370 * If no interrupt occurred or no try conditional is active and no exception
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371 * is being thrown, do nothing (for compatibility of non-EH scripts).
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372 */
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373 if (!got_int || (trylevel == 0 && !did_throw))
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374 return FALSE;
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375
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376 #ifdef THROW_TEST /* avoid warning for condition always true */
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377 if (!THROW_ON_INTERRUPT)
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378 {
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379 /*
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380 * The interrupt aborts everything except for executing finally clauses.
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381 * Discard any user or error or interrupt exception currently being
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382 * thrown.
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383 */
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384 if (did_throw)
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385 discard_current_exception();
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386 }
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387 else
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388 #endif
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389 {
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390 /*
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391 * Throw an interrupt exception, so that everything will be aborted
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392 * (except for executing finally clauses), until the interrupt exception
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393 * is caught; if still uncaught at the top level, the script processing
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394 * will be terminated then. - If an interrupt exception is already
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395 * being thrown, do nothing.
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396 *
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397 */
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398 if (did_throw)
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399 {
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400 if (current_exception->type == ET_INTERRUPT)
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401 return FALSE;
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402
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403 /* An interrupt exception replaces any user or error exception. */
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404 discard_current_exception();
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405 }
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406 if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL)
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407 do_throw(cstack);
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408 }
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409
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410 return TRUE;
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411 }
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412
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413
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|
|
414 /*
|
|
|
415 * Throw a new exception. Return FAIL when out of memory or it was tried to
|
|
|
416 * throw an illegal user exception. "value" is the exception string for a user
|
|
|
417 * or interrupt exception, or points to a message list in case of an error
|
|
|
418 * exception.
|
|
|
419 */
|
|
|
420 static int
|
|
|
421 throw_exception(value, type, cmdname)
|
|
|
422 void *value;
|
|
|
423 int type;
|
|
|
424 char_u *cmdname;
|
|
|
425 {
|
|
|
426 except_T *excp;
|
|
|
427 char_u *p, *mesg, *val;
|
|
|
428 int cmdlen;
|
|
|
429
|
|
|
430 /*
|
|
|
431 * Disallow faking Interrupt or error exceptions as user exceptions. They
|
|
|
432 * would be treated differently from real interrupt or error exceptions when
|
|
|
433 * no active try block is found, see do_cmdline().
|
|
|
434 */
|
|
|
435 if (type == ET_USER)
|
|
|
436 {
|
|
|
437 if (STRNCMP((char_u *)value, "Vim", 3) == 0 &&
|
|
|
438 (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':' ||
|
|
|
439 ((char_u *)value)[3] == '('))
|
|
|
440 {
|
|
|
441 EMSG(_("E608: Cannot :throw exceptions with 'Vim' prefix"));
|
|
|
442 goto fail;
|
|
|
443 }
|
|
|
444 }
|
|
|
445
|
|
|
446 excp = (except_T *)alloc((unsigned)sizeof(except_T));
|
|
|
447 if (excp == NULL)
|
|
|
448 goto nomem;
|
|
|
449
|
|
|
450 if (type == ET_ERROR)
|
|
|
451 {
|
|
|
452 /* Store the original message and prefix the exception value with
|
|
|
453 * "Vim:" or, if a command name is given, "Vim(cmdname):". */
|
|
|
454 excp->messages = (struct msglist *)value;
|
|
|
455 mesg = excp->messages->throw_msg;
|
|
|
456 if (cmdname != NULL && *cmdname != NUL)
|
|
|
457 {
|
|
835
|
458 cmdlen = (int)STRLEN(cmdname);
|
|
7
|
459 excp->value = vim_strnsave((char_u *)"Vim(",
|
|
|
460 4 + cmdlen + 2 + (int)STRLEN(mesg));
|
|
|
461 if (excp->value == NULL)
|
|
|
462 goto nomem;
|
|
|
463 STRCPY(&excp->value[4], cmdname);
|
|
|
464 STRCPY(&excp->value[4 + cmdlen], "):");
|
|
|
465 val = excp->value + 4 + cmdlen + 2;
|
|
|
466 }
|
|
|
467 else
|
|
|
468 {
|
|
|
469 excp->value = vim_strnsave((char_u *)"Vim:", 4 + (int)STRLEN(mesg));
|
|
|
470 if (excp->value == NULL)
|
|
|
471 goto nomem;
|
|
|
472 val = excp->value + 4;
|
|
|
473 }
|
|
|
474
|
|
|
475 /* msg_add_fname may have been used to prefix the message with a file
|
|
|
476 * name in quotes. In the exception value, put the file name in
|
|
|
477 * parentheses and move it to the end. */
|
|
|
478 for (p = mesg; ; p++)
|
|
|
479 {
|
|
|
480 if (*p == NUL
|
|
|
481 || (*p == 'E'
|
|
|
482 && VIM_ISDIGIT(p[1])
|
|
|
483 && (p[2] == ':'
|
|
|
484 || (VIM_ISDIGIT(p[2])
|
|
|
485 && (p[3] == ':'
|
|
|
486 || (VIM_ISDIGIT(p[3])
|
|
|
487 && p[4] == ':'))))))
|
|
|
488 {
|
|
273
|
489 if (*p == NUL || p == mesg)
|
|
|
490 STRCAT(val, mesg); /* 'E123' missing or at beginning */
|
|
7
|
491 else
|
|
|
492 {
|
|
|
493 /* '"filename" E123: message text' */
|
|
|
494 if (mesg[0] != '"' || p-2 < &mesg[1] ||
|
|
|
495 p[-2] != '"' || p[-1] != ' ')
|
|
|
496 /* "E123:" is part of the file name. */
|
|
|
497 continue;
|
|
|
498
|
|
|
499 STRCAT(val, p);
|
|
|
500 p[-2] = NUL;
|
|
|
501 sprintf((char *)(val + STRLEN(p)), " (%s)", &mesg[1]);
|
|
|
502 p[-2] = '"';
|
|
|
503 }
|
|
|
504 break;
|
|
|
505 }
|
|
|
506 }
|
|
|
507 }
|
|
|
508 else
|
|
|
509 excp->value = value;
|
|
|
510
|
|
|
511 excp->type = type;
|
|
|
512 excp->throw_name = vim_strsave(sourcing_name == NULL
|
|
|
513 ? (char_u *)"" : sourcing_name);
|
|
|
514 if (excp->throw_name == NULL)
|
|
|
515 {
|
|
|
516 if (type == ET_ERROR)
|
|
|
517 vim_free(excp->value);
|
|
|
518 goto nomem;
|
|
|
519 }
|
|
|
520 excp->throw_lnum = sourcing_lnum;
|
|
|
521
|
|
|
522 if (p_verbose >= 13 || debug_break_level > 0)
|
|
|
523 {
|
|
|
524 int save_msg_silent = msg_silent;
|
|
|
525
|
|
|
526 if (debug_break_level > 0)
|
|
|
527 msg_silent = FALSE; /* display messages */
|
|
293
|
528 else
|
|
|
529 verbose_enter();
|
|
7
|
530 ++no_wait_return;
|
|
293
|
531 if (debug_break_level > 0 || *p_vfile == NUL)
|
|
|
532 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
|
533
|
|
273
|
534 smsg((char_u *)_("Exception thrown: %s"), excp->value);
|
|
7
|
535 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
293
|
536
|
|
|
537 if (debug_break_level > 0 || *p_vfile == NUL)
|
|
|
538 cmdline_row = msg_row;
|
|
7
|
539 --no_wait_return;
|
|
|
540 if (debug_break_level > 0)
|
|
|
541 msg_silent = save_msg_silent;
|
|
293
|
542 else
|
|
|
543 verbose_leave();
|
|
7
|
544 }
|
|
|
545
|
|
|
546 current_exception = excp;
|
|
|
547 return OK;
|
|
|
548
|
|
|
549 nomem:
|
|
|
550 vim_free(excp);
|
|
|
551 suppress_errthrow = TRUE;
|
|
|
552 EMSG(_(e_outofmem));
|
|
|
553 fail:
|
|
|
554 current_exception = NULL;
|
|
|
555 return FAIL;
|
|
|
556 }
|
|
|
557
|
|
|
558 /*
|
|
|
559 * Discard an exception. "was_finished" is set when the exception has been
|
|
|
560 * caught and the catch clause has been ended normally.
|
|
|
561 */
|
|
|
562 static void
|
|
|
563 discard_exception(excp, was_finished)
|
|
|
564 except_T *excp;
|
|
|
565 int was_finished;
|
|
|
566 {
|
|
|
567 char_u *saved_IObuff;
|
|
|
568
|
|
|
569 if (excp == NULL)
|
|
|
570 {
|
|
|
571 EMSG(_(e_internal));
|
|
|
572 return;
|
|
|
573 }
|
|
|
574
|
|
|
575 if (p_verbose >= 13 || debug_break_level > 0)
|
|
|
576 {
|
|
|
577 int save_msg_silent = msg_silent;
|
|
|
578
|
|
|
579 saved_IObuff = vim_strsave(IObuff);
|
|
|
580 if (debug_break_level > 0)
|
|
|
581 msg_silent = FALSE; /* display messages */
|
|
293
|
582 else
|
|
|
583 verbose_enter();
|
|
7
|
584 ++no_wait_return;
|
|
293
|
585 if (debug_break_level > 0 || *p_vfile == NUL)
|
|
|
586 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
273
|
587 smsg(was_finished
|
|
7
|
588 ? (char_u *)_("Exception finished: %s")
|
|
|
589 : (char_u *)_("Exception discarded: %s"),
|
|
|
590 excp->value);
|
|
|
591 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
293
|
592 if (debug_break_level > 0 || *p_vfile == NUL)
|
|
|
593 cmdline_row = msg_row;
|
|
7
|
594 --no_wait_return;
|
|
|
595 if (debug_break_level > 0)
|
|
|
596 msg_silent = save_msg_silent;
|
|
293
|
597 else
|
|
|
598 verbose_leave();
|
|
7
|
599 STRCPY(IObuff, saved_IObuff);
|
|
|
600 vim_free(saved_IObuff);
|
|
|
601 }
|
|
|
602 if (excp->type != ET_INTERRUPT)
|
|
|
603 vim_free(excp->value);
|
|
|
604 if (excp->type == ET_ERROR)
|
|
|
605 free_msglist(excp->messages);
|
|
|
606 vim_free(excp->throw_name);
|
|
|
607 vim_free(excp);
|
|
|
608 }
|
|
|
609
|
|
|
610 /*
|
|
|
611 * Discard the exception currently being thrown.
|
|
|
612 */
|
|
|
613 void
|
|
|
614 discard_current_exception()
|
|
|
615 {
|
|
|
616 discard_exception(current_exception, FALSE);
|
|
|
617 current_exception = NULL;
|
|
|
618 did_throw = FALSE;
|
|
|
619 need_rethrow = FALSE;
|
|
|
620 }
|
|
|
621
|
|
|
622 /*
|
|
|
623 * Put an exception on the caught stack.
|
|
|
624 */
|
|
|
625 static void
|
|
|
626 catch_exception(excp)
|
|
|
627 except_T *excp;
|
|
|
628 {
|
|
|
629 excp->caught = caught_stack;
|
|
|
630 caught_stack = excp;
|
|
|
631 set_vim_var_string(VV_EXCEPTION, excp->value, -1);
|
|
|
632 if (*excp->throw_name != NUL)
|
|
|
633 {
|
|
|
634 if (excp->throw_lnum != 0)
|
|
273
|
635 vim_snprintf((char *)IObuff, IOSIZE, _("%s, line %ld"),
|
|
|
636 excp->throw_name, (long)excp->throw_lnum);
|
|
7
|
637 else
|
|
273
|
638 vim_snprintf((char *)IObuff, IOSIZE, "%s", excp->throw_name);
|
|
7
|
639 set_vim_var_string(VV_THROWPOINT, IObuff, -1);
|
|
|
640 }
|
|
|
641 else
|
|
|
642 /* throw_name not set on an exception from a command that was typed. */
|
|
|
643 set_vim_var_string(VV_THROWPOINT, NULL, -1);
|
|
|
644
|
|
|
645 if (p_verbose >= 13 || debug_break_level > 0)
|
|
|
646 {
|
|
|
647 int save_msg_silent = msg_silent;
|
|
|
648
|
|
|
649 if (debug_break_level > 0)
|
|
|
650 msg_silent = FALSE; /* display messages */
|
|
293
|
651 else
|
|
|
652 verbose_enter();
|
|
7
|
653 ++no_wait_return;
|
|
293
|
654 if (debug_break_level > 0 || *p_vfile == NUL)
|
|
|
655 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
|
656
|
|
273
|
657 smsg((char_u *)_("Exception caught: %s"), excp->value);
|
|
7
|
658 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
293
|
659
|
|
|
660 if (debug_break_level > 0 || *p_vfile == NUL)
|
|
|
661 cmdline_row = msg_row;
|
|
7
|
662 --no_wait_return;
|
|
|
663 if (debug_break_level > 0)
|
|
|
664 msg_silent = save_msg_silent;
|
|
293
|
665 else
|
|
|
666 verbose_leave();
|
|
7
|
667 }
|
|
|
668 }
|
|
|
669
|
|
|
670 /*
|
|
|
671 * Remove an exception from the caught stack.
|
|
|
672 */
|
|
|
673 static void
|
|
|
674 finish_exception(excp)
|
|
|
675 except_T *excp;
|
|
|
676 {
|
|
|
677 if (excp != caught_stack)
|
|
|
678 EMSG(_(e_internal));
|
|
|
679 caught_stack = caught_stack->caught;
|
|
|
680 if (caught_stack != NULL)
|
|
|
681 {
|
|
|
682 set_vim_var_string(VV_EXCEPTION, caught_stack->value, -1);
|
|
|
683 if (*caught_stack->throw_name != NUL)
|
|
|
684 {
|
|
|
685 if (caught_stack->throw_lnum != 0)
|
|
273
|
686 vim_snprintf((char *)IObuff, IOSIZE,
|
|
7
|
687 _("%s, line %ld"), caught_stack->throw_name,
|
|
|
688 (long)caught_stack->throw_lnum);
|
|
|
689 else
|
|
273
|
690 vim_snprintf((char *)IObuff, IOSIZE, "%s",
|
|
|
691 caught_stack->throw_name);
|
|
7
|
692 set_vim_var_string(VV_THROWPOINT, IObuff, -1);
|
|
|
693 }
|
|
|
694 else
|
|
|
695 /* throw_name not set on an exception from a command that was
|
|
|
696 * typed. */
|
|
|
697 set_vim_var_string(VV_THROWPOINT, NULL, -1);
|
|
|
698 }
|
|
|
699 else
|
|
|
700 {
|
|
|
701 set_vim_var_string(VV_EXCEPTION, NULL, -1);
|
|
|
702 set_vim_var_string(VV_THROWPOINT, NULL, -1);
|
|
|
703 }
|
|
|
704
|
|
|
705 /* Discard the exception, but use the finish message for 'verbose'. */
|
|
|
706 discard_exception(excp, TRUE);
|
|
|
707 }
|
|
|
708
|
|
|
709 /*
|
|
|
710 * Flags specifying the message displayed by report_pending.
|
|
|
711 */
|
|
|
712 #define RP_MAKE 0
|
|
|
713 #define RP_RESUME 1
|
|
|
714 #define RP_DISCARD 2
|
|
|
715
|
|
|
716 /*
|
|
|
717 * Report information about something pending in a finally clause if required by
|
|
|
718 * the 'verbose' option or when debugging. "action" tells whether something is
|
|
|
719 * made pending or something pending is resumed or discarded. "pending" tells
|
|
|
720 * what is pending. "value" specifies the return value for a pending ":return"
|
|
|
721 * or the exception value for a pending exception.
|
|
|
722 */
|
|
|
723 static void
|
|
|
724 report_pending(action, pending, value)
|
|
|
725 int action;
|
|
|
726 int pending;
|
|
|
727 void *value;
|
|
|
728 {
|
|
|
729 char_u *mesg;
|
|
|
730 char *s;
|
|
|
731 int save_msg_silent;
|
|
|
732
|
|
|
733
|
|
|
734 switch (action)
|
|
|
735 {
|
|
|
736 case RP_MAKE:
|
|
|
737 mesg = (char_u *)_("%s made pending");
|
|
|
738 break;
|
|
|
739 case RP_RESUME:
|
|
|
740 mesg = (char_u *)_("%s resumed");
|
|
|
741 break;
|
|
|
742 /* case RP_DISCARD: */
|
|
|
743 default:
|
|
|
744 mesg = (char_u *)_("%s discarded");
|
|
|
745 break;
|
|
|
746 }
|
|
|
747
|
|
|
748 switch (pending)
|
|
|
749 {
|
|
|
750 case CSTP_NONE:
|
|
|
751 return;
|
|
|
752
|
|
|
753 case CSTP_CONTINUE:
|
|
|
754 s = ":continue";
|
|
|
755 break;
|
|
|
756 case CSTP_BREAK:
|
|
|
757 s = ":break";
|
|
|
758 break;
|
|
|
759 case CSTP_FINISH:
|
|
|
760 s = ":finish";
|
|
|
761 break;
|
|
|
762 case CSTP_RETURN:
|
|
|
763 /* ":return" command producing value, allocated */
|
|
|
764 s = (char *)get_return_cmd(value);
|
|
|
765 break;
|
|
|
766
|
|
|
767 default:
|
|
|
768 if (pending & CSTP_THROW)
|
|
|
769 {
|
|
273
|
770 vim_snprintf((char *)IObuff, IOSIZE,
|
|
|
771 (char *)mesg, _("Exception"));
|
|
7
|
772 mesg = vim_strnsave(IObuff, (int)STRLEN(IObuff) + 4);
|
|
|
773 STRCAT(mesg, ": %s");
|
|
|
774 s = (char *)((except_T *)value)->value;
|
|
|
775 }
|
|
|
776 else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT))
|
|
|
777 s = _("Error and interrupt");
|
|
|
778 else if (pending & CSTP_ERROR)
|
|
|
779 s = _("Error");
|
|
|
780 else /* if (pending & CSTP_INTERRUPT) */
|
|
|
781 s = _("Interrupt");
|
|
|
782 }
|
|
|
783
|
|
|
784 save_msg_silent = msg_silent;
|
|
|
785 if (debug_break_level > 0)
|
|
|
786 msg_silent = FALSE; /* display messages */
|
|
|
787 ++no_wait_return;
|
|
|
788 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
273
|
789 smsg(mesg, (char_u *)s);
|
|
7
|
790 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
|
791 cmdline_row = msg_row;
|
|
|
792 --no_wait_return;
|
|
|
793 if (debug_break_level > 0)
|
|
|
794 msg_silent = save_msg_silent;
|
|
|
795
|
|
|
796 if (pending == CSTP_RETURN)
|
|
|
797 vim_free(s);
|
|
|
798 else if (pending & CSTP_THROW)
|
|
|
799 vim_free(mesg);
|
|
|
800 }
|
|
|
801
|
|
|
802 /*
|
|
|
803 * If something is made pending in a finally clause, report it if required by
|
|
|
804 * the 'verbose' option or when debugging.
|
|
|
805 */
|
|
|
806 void
|
|
|
807 report_make_pending(pending, value)
|
|
|
808 int pending;
|
|
|
809 void *value;
|
|
|
810 {
|
|
|
811 if (p_verbose >= 14 || debug_break_level > 0)
|
|
293
|
812 {
|
|
|
813 if (debug_break_level <= 0)
|
|
|
814 verbose_enter();
|
|
7
|
815 report_pending(RP_MAKE, pending, value);
|
|
293
|
816 if (debug_break_level <= 0)
|
|
|
817 verbose_leave();
|
|
|
818 }
|
|
7
|
819 }
|
|
|
820
|
|
|
821 /*
|
|
|
822 * If something pending in a finally clause is resumed at the ":endtry", report
|
|
|
823 * it if required by the 'verbose' option or when debugging.
|
|
|
824 */
|
|
|
825 void
|
|
|
826 report_resume_pending(pending, value)
|
|
|
827 int pending;
|
|
|
828 void *value;
|
|
|
829 {
|
|
|
830 if (p_verbose >= 14 || debug_break_level > 0)
|
|
293
|
831 {
|
|
|
832 if (debug_break_level <= 0)
|
|
|
833 verbose_enter();
|
|
7
|
834 report_pending(RP_RESUME, pending, value);
|
|
293
|
835 if (debug_break_level <= 0)
|
|
|
836 verbose_leave();
|
|
|
837 }
|
|
7
|
838 }
|
|
|
839
|
|
|
840 /*
|
|
|
841 * If something pending in a finally clause is discarded, report it if required
|
|
|
842 * by the 'verbose' option or when debugging.
|
|
|
843 */
|
|
|
844 void
|
|
|
845 report_discard_pending(pending, value)
|
|
|
846 int pending;
|
|
|
847 void *value;
|
|
|
848 {
|
|
|
849 if (p_verbose >= 14 || debug_break_level > 0)
|
|
293
|
850 {
|
|
|
851 if (debug_break_level <= 0)
|
|
|
852 verbose_enter();
|
|
7
|
853 report_pending(RP_DISCARD, pending, value);
|
|
293
|
854 if (debug_break_level <= 0)
|
|
|
855 verbose_leave();
|
|
|
856 }
|
|
7
|
857 }
|
|
|
858
|
|
|
859
|
|
|
860 /*
|
|
|
861 * ":if".
|
|
|
862 */
|
|
|
863 void
|
|
|
864 ex_if(eap)
|
|
|
865 exarg_T *eap;
|
|
|
866 {
|
|
|
867 int error;
|
|
|
868 int skip;
|
|
|
869 int result;
|
|
|
870 struct condstack *cstack = eap->cstack;
|
|
|
871
|
|
|
872 if (cstack->cs_idx == CSTACK_LEN - 1)
|
|
|
873 eap->errmsg = (char_u *)N_("E579: :if nesting too deep");
|
|
|
874 else
|
|
|
875 {
|
|
|
876 ++cstack->cs_idx;
|
|
|
877 cstack->cs_flags[cstack->cs_idx] = 0;
|
|
|
878
|
|
|
879 /*
|
|
|
880 * Don't do something after an error, interrupt, or throw, or when there
|
|
|
881 * is a surrounding conditional and it was not active.
|
|
|
882 */
|
|
|
883 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
|
884 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
|
885
|
|
|
886 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
|
|
|
887
|
|
|
888 if (!skip && !error)
|
|
|
889 {
|
|
|
890 if (result)
|
|
|
891 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
|
|
|
892 }
|
|
|
893 else
|
|
|
894 /* set TRUE, so this conditional will never get active */
|
|
|
895 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
|
|
|
896 }
|
|
|
897 }
|
|
|
898
|
|
|
899 /*
|
|
|
900 * ":endif".
|
|
|
901 */
|
|
|
902 void
|
|
|
903 ex_endif(eap)
|
|
|
904 exarg_T *eap;
|
|
|
905 {
|
|
|
906 did_endif = TRUE;
|
|
|
907 if (eap->cstack->cs_idx < 0
|
|
79
|
908 || (eap->cstack->cs_flags[eap->cstack->cs_idx]
|
|
|
909 & (CSF_WHILE | CSF_FOR | CSF_TRY)))
|
|
7
|
910 eap->errmsg = (char_u *)N_("E580: :endif without :if");
|
|
|
911 else
|
|
|
912 {
|
|
|
913 /*
|
|
|
914 * When debugging or a breakpoint was encountered, display the debug
|
|
|
915 * prompt (if not already done). This shows the user that an ":endif"
|
|
|
916 * is executed when the ":if" or a previous ":elseif" was not TRUE.
|
|
|
917 * Handle a ">quit" debug command as if an interrupt had occurred before
|
|
|
918 * the ":endif". That is, throw an interrupt exception if appropriate.
|
|
|
919 * Doing this here prevents an exception for a parsing error being
|
|
|
920 * discarded by throwing the interrupt exception later on.
|
|
|
921 */
|
|
359
|
922 if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE)
|
|
|
923 && dbg_check_skipped(eap))
|
|
7
|
924 (void)do_intthrow(eap->cstack);
|
|
|
925
|
|
|
926 --eap->cstack->cs_idx;
|
|
|
927 }
|
|
|
928 }
|
|
|
929
|
|
|
930 /*
|
|
|
931 * ":else" and ":elseif".
|
|
|
932 */
|
|
|
933 void
|
|
|
934 ex_else(eap)
|
|
|
935 exarg_T *eap;
|
|
|
936 {
|
|
|
937 int error;
|
|
|
938 int skip;
|
|
|
939 int result;
|
|
|
940 struct condstack *cstack = eap->cstack;
|
|
|
941
|
|
|
942 /*
|
|
|
943 * Don't do something after an error, interrupt, or throw, or when there is
|
|
|
944 * a surrounding conditional and it was not active.
|
|
|
945 */
|
|
|
946 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
|
947 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
|
948
|
|
|
949 if (cstack->cs_idx < 0
|
|
75
|
950 || (cstack->cs_flags[cstack->cs_idx]
|
|
|
951 & (CSF_WHILE | CSF_FOR | CSF_TRY)))
|
|
7
|
952 {
|
|
|
953 if (eap->cmdidx == CMD_else)
|
|
|
954 {
|
|
|
955 eap->errmsg = (char_u *)N_("E581: :else without :if");
|
|
|
956 return;
|
|
|
957 }
|
|
|
958 eap->errmsg = (char_u *)N_("E582: :elseif without :if");
|
|
|
959 skip = TRUE;
|
|
|
960 }
|
|
|
961 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE)
|
|
|
962 {
|
|
|
963 if (eap->cmdidx == CMD_else)
|
|
|
964 {
|
|
|
965 eap->errmsg = (char_u *)N_("E583: multiple :else");
|
|
|
966 return;
|
|
|
967 }
|
|
|
968 eap->errmsg = (char_u *)N_("E584: :elseif after :else");
|
|
|
969 skip = TRUE;
|
|
|
970 }
|
|
|
971
|
|
|
972 /* if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it */
|
|
|
973 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE)
|
|
|
974 {
|
|
|
975 if (eap->errmsg == NULL)
|
|
|
976 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
|
|
|
977 skip = TRUE; /* don't evaluate an ":elseif" */
|
|
|
978 }
|
|
|
979 else
|
|
|
980 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE;
|
|
|
981
|
|
|
982 /*
|
|
|
983 * When debugging or a breakpoint was encountered, display the debug prompt
|
|
|
984 * (if not already done). This shows the user that an ":else" or ":elseif"
|
|
|
985 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle
|
|
|
986 * a ">quit" debug command as if an interrupt had occurred before the
|
|
|
987 * ":else" or ":elseif". That is, set "skip" and throw an interrupt
|
|
|
988 * exception if appropriate. Doing this here prevents that an exception
|
|
|
989 * for a parsing errors is discarded when throwing the interrupt exception
|
|
|
990 * later on.
|
|
|
991 */
|
|
|
992 if (!skip && dbg_check_skipped(eap) && got_int)
|
|
|
993 {
|
|
|
994 (void)do_intthrow(cstack);
|
|
|
995 skip = TRUE;
|
|
|
996 }
|
|
|
997
|
|
|
998 if (eap->cmdidx == CMD_elseif)
|
|
|
999 {
|
|
|
1000 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
|
|
|
1001 /* When throwing error exceptions, we want to throw always the first
|
|
|
1002 * of several errors in a row. This is what actually happens when
|
|
|
1003 * a conditional error was detected above and there is another failure
|
|
|
1004 * when parsing the expression. Since the skip flag is set in this
|
|
|
1005 * case, the parsing error will be ignored by emsg(). */
|
|
|
1006
|
|
|
1007 if (!skip && !error)
|
|
|
1008 {
|
|
|
1009 if (result)
|
|
|
1010 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
|
|
|
1011 else
|
|
|
1012 cstack->cs_flags[cstack->cs_idx] = 0;
|
|
|
1013 }
|
|
|
1014 else if (eap->errmsg == NULL)
|
|
|
1015 /* set TRUE, so this conditional will never get active */
|
|
|
1016 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
|
|
|
1017 }
|
|
|
1018 else
|
|
|
1019 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE;
|
|
|
1020 }
|
|
|
1021
|
|
|
1022 /*
|
|
75
|
1023 * Handle ":while" and ":for".
|
|
7
|
1024 */
|
|
|
1025 void
|
|
|
1026 ex_while(eap)
|
|
|
1027 exarg_T *eap;
|
|
|
1028 {
|
|
|
1029 int error;
|
|
|
1030 int skip;
|
|
|
1031 int result;
|
|
|
1032 struct condstack *cstack = eap->cstack;
|
|
|
1033
|
|
|
1034 if (cstack->cs_idx == CSTACK_LEN - 1)
|
|
75
|
1035 eap->errmsg = (char_u *)N_("E585: :while/:for nesting too deep");
|
|
7
|
1036 else
|
|
|
1037 {
|
|
|
1038 /*
|
|
75
|
1039 * The loop flag is set when we have jumped back from the matching
|
|
|
1040 * ":endwhile" or ":endfor". When not set, need to initialise this
|
|
|
1041 * cstack entry.
|
|
7
|
1042 */
|
|
75
|
1043 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0)
|
|
7
|
1044 {
|
|
|
1045 ++cstack->cs_idx;
|
|
75
|
1046 ++cstack->cs_looplevel;
|
|
7
|
1047 cstack->cs_line[cstack->cs_idx] = -1;
|
|
|
1048 }
|
|
75
|
1049 cstack->cs_flags[cstack->cs_idx] =
|
|
|
1050 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR;
|
|
7
|
1051
|
|
|
1052 /*
|
|
75
|
1053 * Don't do something after an error, interrupt, or throw, or when
|
|
|
1054 * there is a surrounding conditional and it was not active.
|
|
7
|
1055 */
|
|
|
1056 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
|
1057 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
75
|
1058 if (eap->cmdidx == CMD_while)
|
|
|
1059 {
|
|
|
1060 /*
|
|
|
1061 * ":while bool-expr"
|
|
|
1062 */
|
|
|
1063 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
|
|
|
1064 }
|
|
|
1065 else
|
|
|
1066 {
|
|
|
1067 void *fi;
|
|
|
1068
|
|
|
1069 /*
|
|
|
1070 * ":for var in list-expr"
|
|
|
1071 */
|
|
|
1072 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0)
|
|
|
1073 {
|
|
|
1074 /* Jumping here from a ":continue" or ":endfor": use the
|
|
|
1075 * previously evaluated list. */
|
|
79
|
1076 fi = cstack->cs_forinfo[cstack->cs_idx];
|
|
75
|
1077 error = FALSE;
|
|
|
1078 }
|
|
|
1079 else
|
|
|
1080 {
|
|
|
1081 /* Evaluate the argument and get the info in a structure. */
|
|
|
1082 fi = eval_for_line(eap->arg, &error, &eap->nextcmd, skip);
|
|
79
|
1083 cstack->cs_forinfo[cstack->cs_idx] = fi;
|
|
75
|
1084 }
|
|
|
1085
|
|
|
1086 /* use the element at the start of the list and advance */
|
|
|
1087 if (!error && fi != NULL && !skip)
|
|
|
1088 result = next_for_item(fi, eap->arg);
|
|
|
1089 else
|
|
|
1090 result = FALSE;
|
|
|
1091
|
|
|
1092 if (!result)
|
|
|
1093 {
|
|
|
1094 free_for_info(fi);
|
|
79
|
1095 cstack->cs_forinfo[cstack->cs_idx] = NULL;
|
|
75
|
1096 }
|
|
|
1097 }
|
|
7
|
1098
|
|
|
1099 /*
|
|
75
|
1100 * If this cstack entry was just initialised and is active, set the
|
|
|
1101 * loop flag, so do_cmdline() will set the line number in cs_line[].
|
|
|
1102 * If executing the command a second time, clear the loop flag.
|
|
7
|
1103 */
|
|
|
1104 if (!skip && !error && result)
|
|
|
1105 {
|
|
75
|
1106 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE);
|
|
|
1107 cstack->cs_lflags ^= CSL_HAD_LOOP;
|
|
7
|
1108 }
|
|
|
1109 else
|
|
|
1110 {
|
|
75
|
1111 cstack->cs_lflags &= ~CSL_HAD_LOOP;
|
|
|
1112 /* If the ":while" evaluates to FALSE or ":for" is past the end of
|
|
|
1113 * the list, show the debug prompt at the ":endwhile"/":endfor" as
|
|
|
1114 * if there was a ":break" in a ":while"/":for" evaluating to
|
|
|
1115 * TRUE. */
|
|
7
|
1116 if (!skip && !error)
|
|
|
1117 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE;
|
|
|
1118 }
|
|
|
1119 }
|
|
|
1120 }
|
|
|
1121
|
|
|
1122 /*
|
|
|
1123 * ":continue"
|
|
|
1124 */
|
|
|
1125 void
|
|
|
1126 ex_continue(eap)
|
|
|
1127 exarg_T *eap;
|
|
|
1128 {
|
|
|
1129 int idx;
|
|
|
1130 struct condstack *cstack = eap->cstack;
|
|
|
1131
|
|
75
|
1132 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
|
|
|
1133 eap->errmsg = (char_u *)N_("E586: :continue without :while or :for");
|
|
7
|
1134 else
|
|
|
1135 {
|
|
|
1136 /* Try to find the matching ":while". This might stop at a try
|
|
|
1137 * conditional not in its finally clause (which is then to be executed
|
|
|
1138 * next). Therefor, inactivate all conditionals except the ":while"
|
|
|
1139 * itself (if reached). */
|
|
75
|
1140 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
|
|
840
|
1141 if (idx >= 0 && (cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
|
|
7
|
1142 {
|
|
79
|
1143 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
|
|
7
|
1144
|
|
|
1145 /*
|
|
75
|
1146 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the
|
|
7
|
1147 * matching ":while".
|
|
|
1148 */
|
|
75
|
1149 cstack->cs_lflags |= CSL_HAD_CONT; /* let do_cmdline() handle it */
|
|
7
|
1150 }
|
|
|
1151 else
|
|
|
1152 {
|
|
|
1153 /* If a try conditional not in its finally clause is reached first,
|
|
|
1154 * make the ":continue" pending for execution at the ":endtry". */
|
|
|
1155 cstack->cs_pending[idx] = CSTP_CONTINUE;
|
|
|
1156 report_make_pending(CSTP_CONTINUE, NULL);
|
|
|
1157 }
|
|
|
1158 }
|
|
|
1159 }
|
|
|
1160
|
|
|
1161 /*
|
|
|
1162 * ":break"
|
|
|
1163 */
|
|
|
1164 void
|
|
|
1165 ex_break(eap)
|
|
|
1166 exarg_T *eap;
|
|
|
1167 {
|
|
|
1168 int idx;
|
|
|
1169 struct condstack *cstack = eap->cstack;
|
|
|
1170
|
|
75
|
1171 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
|
|
|
1172 eap->errmsg = (char_u *)N_("E587: :break without :while or :for");
|
|
7
|
1173 else
|
|
|
1174 {
|
|
|
1175 /* Inactivate conditionals until the matching ":while" or a try
|
|
|
1176 * conditional not in its finally clause (which is then to be
|
|
|
1177 * executed next) is found. In the latter case, make the ":break"
|
|
|
1178 * pending for execution at the ":endtry". */
|
|
75
|
1179 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE);
|
|
840
|
1180 if (idx >= 0 && !(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
|
|
7
|
1181 {
|
|
|
1182 cstack->cs_pending[idx] = CSTP_BREAK;
|
|
|
1183 report_make_pending(CSTP_BREAK, NULL);
|
|
|
1184 }
|
|
|
1185 }
|
|
|
1186 }
|
|
|
1187
|
|
|
1188 /*
|
|
75
|
1189 * ":endwhile" and ":endfor"
|
|
7
|
1190 */
|
|
|
1191 void
|
|
|
1192 ex_endwhile(eap)
|
|
|
1193 exarg_T *eap;
|
|
|
1194 {
|
|
|
1195 struct condstack *cstack = eap->cstack;
|
|
75
|
1196 int idx;
|
|
|
1197 char_u *err;
|
|
|
1198 int csf;
|
|
|
1199 int fl;
|
|
7
|
1200
|
|
75
|
1201 if (eap->cmdidx == CMD_endwhile)
|
|
|
1202 {
|
|
|
1203 err = e_while;
|
|
|
1204 csf = CSF_WHILE;
|
|
|
1205 }
|
|
|
1206 else
|
|
|
1207 {
|
|
|
1208 err = e_for;
|
|
|
1209 csf = CSF_FOR;
|
|
|
1210 }
|
|
|
1211
|
|
|
1212 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
|
|
|
1213 eap->errmsg = err;
|
|
7
|
1214 else
|
|
|
1215 {
|
|
75
|
1216 fl = cstack->cs_flags[cstack->cs_idx];
|
|
|
1217 if (!(fl & csf))
|
|
7
|
1218 {
|
|
114
|
1219 /* If we are in a ":while" or ":for" but used the wrong endloop
|
|
|
1220 * command, do not rewind to the next enclosing ":for"/":while". */
|
|
75
|
1221 if (fl & CSF_WHILE)
|
|
114
|
1222 eap->errmsg = (char_u *)_("E732: Using :endfor with :while");
|
|
75
|
1223 else if (fl & CSF_FOR)
|
|
114
|
1224 eap->errmsg = (char_u *)_("E733: Using :endwhile with :for");
|
|
|
1225 }
|
|
|
1226 if (!(fl & (CSF_WHILE | CSF_FOR)))
|
|
|
1227 {
|
|
|
1228 if (!(fl & CSF_TRY))
|
|
75
|
1229 eap->errmsg = e_endif;
|
|
|
1230 else if (fl & CSF_FINALLY)
|
|
|
1231 eap->errmsg = e_endtry;
|
|
7
|
1232 /* Try to find the matching ":while" and report what's missing. */
|
|
|
1233 for (idx = cstack->cs_idx; idx > 0; --idx)
|
|
|
1234 {
|
|
75
|
1235 fl = cstack->cs_flags[idx];
|
|
|
1236 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY))
|
|
7
|
1237 {
|
|
|
1238 /* Give up at a try conditional not in its finally clause.
|
|
75
|
1239 * Ignore the ":endwhile"/":endfor". */
|
|
|
1240 eap->errmsg = err;
|
|
7
|
1241 return;
|
|
|
1242 }
|
|
75
|
1243 if (fl & csf)
|
|
7
|
1244 break;
|
|
|
1245 }
|
|
|
1246 /* Cleanup and rewind all contained (and unclosed) conditionals. */
|
|
75
|
1247 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
|
|
7
|
1248 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
|
|
|
1249 }
|
|
|
1250
|
|
|
1251 /*
|
|
|
1252 * When debugging or a breakpoint was encountered, display the debug
|
|
|
1253 * prompt (if not already done). This shows the user that an
|
|
75
|
1254 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or
|
|
|
1255 * after a ":break". Handle a ">quit" debug command as if an
|
|
|
1256 * interrupt had occurred before the ":endwhile"/":endfor". That is,
|
|
|
1257 * throw an interrupt exception if appropriate. Doing this here
|
|
|
1258 * prevents that an exception for a parsing error is discarded when
|
|
|
1259 * throwing the interrupt exception later on.
|
|
7
|
1260 */
|
|
|
1261 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE
|
|
|
1262 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE)
|
|
|
1263 && dbg_check_skipped(eap))
|
|
|
1264 (void)do_intthrow(cstack);
|
|
|
1265
|
|
|
1266 /*
|
|
75
|
1267 * Set loop flag, so do_cmdline() will jump back to the matching
|
|
|
1268 * ":while" or ":for".
|
|
7
|
1269 */
|
|
75
|
1270 cstack->cs_lflags |= CSL_HAD_ENDLOOP;
|
|
7
|
1271 }
|
|
|
1272 }
|
|
|
1273
|
|
|
1274
|
|
|
1275 /*
|
|
|
1276 * ":throw expr"
|
|
|
1277 */
|
|
|
1278 void
|
|
|
1279 ex_throw(eap)
|
|
|
1280 exarg_T *eap;
|
|
|
1281 {
|
|
|
1282 char_u *arg = eap->arg;
|
|
|
1283 char_u *value;
|
|
|
1284
|
|
|
1285 if (*arg != NUL && *arg != '|' && *arg != '\n')
|
|
|
1286 value = eval_to_string_skip(arg, &eap->nextcmd, eap->skip);
|
|
|
1287 else
|
|
|
1288 {
|
|
|
1289 EMSG(_(e_argreq));
|
|
|
1290 value = NULL;
|
|
|
1291 }
|
|
|
1292
|
|
|
1293 /* On error or when an exception is thrown during argument evaluation, do
|
|
|
1294 * not throw. */
|
|
|
1295 if (!eap->skip && value != NULL)
|
|
|
1296 {
|
|
|
1297 if (throw_exception(value, ET_USER, NULL) == FAIL)
|
|
|
1298 vim_free(value);
|
|
|
1299 else
|
|
|
1300 do_throw(eap->cstack);
|
|
|
1301 }
|
|
|
1302 }
|
|
|
1303
|
|
|
1304 /*
|
|
21
|
1305 * Throw the current exception through the specified cstack. Common routine
|
|
|
1306 * for ":throw" (user exception) and error and interrupt exceptions. Also
|
|
|
1307 * used for rethrowing an uncaught exception.
|
|
7
|
1308 */
|
|
|
1309 void
|
|
|
1310 do_throw(cstack)
|
|
|
1311 struct condstack *cstack;
|
|
|
1312 {
|
|
|
1313 int idx;
|
|
|
1314 int inactivate_try = FALSE;
|
|
|
1315
|
|
|
1316 /*
|
|
|
1317 * Cleanup and inactivate up to the next surrounding try conditional that
|
|
|
1318 * is not in its finally clause. Normally, do not inactivate the try
|
|
|
1319 * conditional itself, so that its ACTIVE flag can be tested below. But
|
|
|
1320 * if a previous error or interrupt has not been converted to an exception,
|
|
|
1321 * inactivate the try conditional, too, as if the conversion had been done,
|
|
21
|
1322 * and reset the did_emsg or got_int flag, so this won't happen again at
|
|
|
1323 * the next surrounding try conditional.
|
|
7
|
1324 */
|
|
1880
|
1325 #ifndef THROW_ON_ERROR_TRUE
|
|
7
|
1326 if (did_emsg && !THROW_ON_ERROR)
|
|
|
1327 {
|
|
|
1328 inactivate_try = TRUE;
|
|
|
1329 did_emsg = FALSE;
|
|
|
1330 }
|
|
1880
|
1331 #endif
|
|
|
1332 #ifndef THROW_ON_INTERRUPT_TRUE
|
|
7
|
1333 if (got_int && !THROW_ON_INTERRUPT)
|
|
|
1334 {
|
|
|
1335 inactivate_try = TRUE;
|
|
|
1336 got_int = FALSE;
|
|
|
1337 }
|
|
1880
|
1338 #endif
|
|
7
|
1339 idx = cleanup_conditionals(cstack, 0, inactivate_try);
|
|
|
1340 if (idx >= 0)
|
|
|
1341 {
|
|
|
1342 /*
|
|
|
1343 * If this try conditional is active and we are before its first
|
|
21
|
1344 * ":catch", set THROWN so that the ":catch" commands will check
|
|
|
1345 * whether the exception matches. When the exception came from any of
|
|
|
1346 * the catch clauses, it will be made pending at the ":finally" (if
|
|
|
1347 * present) and rethrown at the ":endtry". This will also happen if
|
|
|
1348 * the try conditional is inactive. This is the case when we are
|
|
|
1349 * throwing an exception due to an error or interrupt on the way from
|
|
|
1350 * a preceding ":continue", ":break", ":return", ":finish", error or
|
|
|
1351 * interrupt (not converted to an exception) to the finally clause or
|
|
|
1352 * from a preceding throw of a user or error or interrupt exception to
|
|
|
1353 * the matching catch clause or the finally clause.
|
|
7
|
1354 */
|
|
|
1355 if (!(cstack->cs_flags[idx] & CSF_CAUGHT))
|
|
|
1356 {
|
|
|
1357 if (cstack->cs_flags[idx] & CSF_ACTIVE)
|
|
|
1358 cstack->cs_flags[idx] |= CSF_THROWN;
|
|
|
1359 else
|
|
|
1360 /* THROWN may have already been set for a catchable exception
|
|
|
1361 * that has been discarded. Ensure it is reset for the new
|
|
|
1362 * exception. */
|
|
|
1363 cstack->cs_flags[idx] &= ~CSF_THROWN;
|
|
|
1364 }
|
|
|
1365 cstack->cs_flags[idx] &= ~CSF_ACTIVE;
|
|
|
1366 cstack->cs_exception[idx] = current_exception;
|
|
|
1367 }
|
|
|
1368 #if 0
|
|
21
|
1369 /* TODO: Add optimization below. Not yet done because of interface
|
|
|
1370 * problems to eval.c and ex_cmds2.c. (Servatius) */
|
|
7
|
1371 else
|
|
|
1372 {
|
|
|
1373 /*
|
|
|
1374 * There are no catch clauses to check or finally clauses to execute.
|
|
|
1375 * End the current script or function. The exception will be rethrown
|
|
|
1376 * in the caller.
|
|
|
1377 */
|
|
|
1378 if (getline_equal(eap->getline, eap->cookie, get_func_line))
|
|
|
1379 current_funccal->returned = TRUE;
|
|
|
1380 elseif (eap->get_func_line == getsourceline)
|
|
|
1381 ((struct source_cookie *)eap->cookie)->finished = TRUE;
|
|
|
1382 }
|
|
|
1383 #endif
|
|
|
1384
|
|
|
1385 did_throw = TRUE;
|
|
|
1386 }
|
|
|
1387
|
|
|
1388 /*
|
|
|
1389 * ":try"
|
|
|
1390 */
|
|
|
1391 void
|
|
|
1392 ex_try(eap)
|
|
|
1393 exarg_T *eap;
|
|
|
1394 {
|
|
|
1395 int skip;
|
|
|
1396 struct condstack *cstack = eap->cstack;
|
|
|
1397
|
|
|
1398 if (cstack->cs_idx == CSTACK_LEN - 1)
|
|
|
1399 eap->errmsg = (char_u *)N_("E601: :try nesting too deep");
|
|
|
1400 else
|
|
|
1401 {
|
|
|
1402 ++cstack->cs_idx;
|
|
|
1403 ++cstack->cs_trylevel;
|
|
|
1404 cstack->cs_flags[cstack->cs_idx] = CSF_TRY;
|
|
|
1405 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE;
|
|
|
1406
|
|
|
1407 /*
|
|
|
1408 * Don't do something after an error, interrupt, or throw, or when there
|
|
|
1409 * is a surrounding conditional and it was not active.
|
|
|
1410 */
|
|
|
1411 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
|
1412 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
|
1413
|
|
|
1414 if (!skip)
|
|
|
1415 {
|
|
|
1416 /* Set ACTIVE and TRUE. TRUE means that the corresponding ":catch"
|
|
|
1417 * commands should check for a match if an exception is thrown and
|
|
|
1418 * that the finally clause needs to be executed. */
|
|
|
1419 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE;
|
|
|
1420
|
|
|
1421 /*
|
|
|
1422 * ":silent!", even when used in a try conditional, disables
|
|
|
1423 * displaying of error messages and conversion of errors to
|
|
|
1424 * exceptions. When the silent commands again open a try
|
|
|
1425 * conditional, save "emsg_silent" and reset it so that errors are
|
|
|
1426 * again converted to exceptions. The value is restored when that
|
|
|
1427 * try conditional is left. If it is left normally, the commands
|
|
|
1428 * following the ":endtry" are again silent. If it is left by
|
|
|
1429 * a ":continue", ":break", ":return", or ":finish", the commands
|
|
|
1430 * executed next are again silent. If it is left due to an
|
|
|
1431 * aborting error, an interrupt, or an exception, restoring
|
|
|
1432 * "emsg_silent" does not matter since we are already in the
|
|
|
1433 * aborting state and/or the exception has already been thrown.
|
|
|
1434 * The effect is then just freeing the memory that was allocated
|
|
|
1435 * to save the value.
|
|
|
1436 */
|
|
|
1437 if (emsg_silent)
|
|
|
1438 {
|
|
|
1439 eslist_T *elem;
|
|
|
1440
|
|
|
1441 elem = (eslist_T *)alloc((unsigned)sizeof(struct eslist_elem));
|
|
|
1442 if (elem == NULL)
|
|
|
1443 EMSG(_(e_outofmem));
|
|
|
1444 else
|
|
|
1445 {
|
|
|
1446 elem->saved_emsg_silent = emsg_silent;
|
|
|
1447 elem->next = cstack->cs_emsg_silent_list;
|
|
|
1448 cstack->cs_emsg_silent_list = elem;
|
|
|
1449 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT;
|
|
|
1450 emsg_silent = 0;
|
|
|
1451 }
|
|
|
1452 }
|
|
|
1453 }
|
|
|
1454
|
|
|
1455 }
|
|
|
1456 }
|
|
|
1457
|
|
|
1458 /*
|
|
|
1459 * ":catch /{pattern}/" and ":catch"
|
|
|
1460 */
|
|
|
1461 void
|
|
|
1462 ex_catch(eap)
|
|
|
1463 exarg_T *eap;
|
|
|
1464 {
|
|
|
1465 int idx = 0;
|
|
|
1466 int give_up = FALSE;
|
|
|
1467 int skip = FALSE;
|
|
|
1468 int caught = FALSE;
|
|
|
1469 char_u *end;
|
|
|
1470 int save_char = 0;
|
|
|
1471 char_u *save_cpo;
|
|
|
1472 regmatch_T regmatch;
|
|
|
1473 int prev_got_int;
|
|
|
1474 struct condstack *cstack = eap->cstack;
|
|
|
1475 char_u *pat;
|
|
|
1476
|
|
|
1477 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
|
|
|
1478 {
|
|
|
1479 eap->errmsg = (char_u *)N_("E603: :catch without :try");
|
|
|
1480 give_up = TRUE;
|
|
|
1481 }
|
|
|
1482 else
|
|
|
1483 {
|
|
|
1484 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
|
|
|
1485 {
|
|
|
1486 /* Report what's missing if the matching ":try" is not in its
|
|
|
1487 * finally clause. */
|
|
75
|
1488 eap->errmsg = get_end_emsg(cstack);
|
|
7
|
1489 skip = TRUE;
|
|
|
1490 }
|
|
|
1491 for (idx = cstack->cs_idx; idx > 0; --idx)
|
|
|
1492 if (cstack->cs_flags[idx] & CSF_TRY)
|
|
|
1493 break;
|
|
|
1494 if (cstack->cs_flags[idx] & CSF_FINALLY)
|
|
|
1495 {
|
|
|
1496 /* Give up for a ":catch" after ":finally" and ignore it.
|
|
|
1497 * Just parse. */
|
|
|
1498 eap->errmsg = (char_u *)N_("E604: :catch after :finally");
|
|
|
1499 give_up = TRUE;
|
|
|
1500 }
|
|
79
|
1501 else
|
|
75
|
1502 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
|
|
|
1503 &cstack->cs_looplevel);
|
|
7
|
1504 }
|
|
|
1505
|
|
|
1506 if (ends_excmd(*eap->arg)) /* no argument, catch all errors */
|
|
|
1507 {
|
|
|
1508 pat = (char_u *)".*";
|
|
|
1509 end = NULL;
|
|
|
1510 eap->nextcmd = find_nextcmd(eap->arg);
|
|
|
1511 }
|
|
|
1512 else
|
|
|
1513 {
|
|
|
1514 pat = eap->arg + 1;
|
|
|
1515 end = skip_regexp(pat, *eap->arg, TRUE, NULL);
|
|
|
1516 }
|
|
|
1517
|
|
|
1518 if (!give_up)
|
|
|
1519 {
|
|
|
1520 /*
|
|
|
1521 * Don't do something when no exception has been thrown or when the
|
|
|
1522 * corresponding try block never got active (because of an inactive
|
|
|
1523 * surrounding conditional or after an error or interrupt or throw).
|
|
|
1524 */
|
|
|
1525 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE))
|
|
|
1526 skip = TRUE;
|
|
|
1527
|
|
|
1528 /*
|
|
|
1529 * Check for a match only if an exception is thrown but not caught by
|
|
|
1530 * a previous ":catch". An exception that has replaced a discarded
|
|
|
1531 * exception is not checked (THROWN is not set then).
|
|
|
1532 */
|
|
|
1533 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN)
|
|
|
1534 && !(cstack->cs_flags[idx] & CSF_CAUGHT))
|
|
|
1535 {
|
|
|
1536 if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1)))
|
|
|
1537 {
|
|
|
1538 EMSG(_(e_trailing));
|
|
|
1539 return;
|
|
|
1540 }
|
|
|
1541
|
|
|
1542 /* When debugging or a breakpoint was encountered, display the
|
|
|
1543 * debug prompt (if not already done) before checking for a match.
|
|
|
1544 * This is a helpful hint for the user when the regular expression
|
|
|
1545 * matching fails. Handle a ">quit" debug command as if an
|
|
|
1546 * interrupt had occurred before the ":catch". That is, discard
|
|
|
1547 * the original exception, replace it by an interrupt exception,
|
|
|
1548 * and don't catch it in this try block. */
|
|
|
1549 if (!dbg_check_skipped(eap) || !do_intthrow(cstack))
|
|
|
1550 {
|
|
|
1551 /* Terminate the pattern and avoid the 'l' flag in 'cpoptions'
|
|
|
1552 * while compiling it. */
|
|
|
1553 if (end != NULL)
|
|
|
1554 {
|
|
|
1555 save_char = *end;
|
|
|
1556 *end = NUL;
|
|
|
1557 }
|
|
|
1558 save_cpo = p_cpo;
|
|
|
1559 p_cpo = (char_u *)"";
|
|
1333
|
1560 regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
|
|
7
|
1561 regmatch.rm_ic = FALSE;
|
|
|
1562 if (end != NULL)
|
|
|
1563 *end = save_char;
|
|
|
1564 p_cpo = save_cpo;
|
|
|
1565 if (regmatch.regprog == NULL)
|
|
|
1566 EMSG2(_(e_invarg2), pat);
|
|
|
1567 else
|
|
|
1568 {
|
|
|
1569 /*
|
|
|
1570 * Save the value of got_int and reset it. We don't want
|
|
|
1571 * a previous interruption cancel matching, only hitting
|
|
|
1572 * CTRL-C while matching should abort it.
|
|
|
1573 */
|
|
|
1574 prev_got_int = got_int;
|
|
|
1575 got_int = FALSE;
|
|
|
1576 caught = vim_regexec_nl(®match, current_exception->value,
|
|
|
1577 (colnr_T)0);
|
|
|
1578 got_int |= prev_got_int;
|
|
|
1579 vim_free(regmatch.regprog);
|
|
|
1580 }
|
|
|
1581 }
|
|
|
1582 }
|
|
|
1583
|
|
|
1584 if (caught)
|
|
|
1585 {
|
|
|
1586 /* Make this ":catch" clause active and reset did_emsg, got_int,
|
|
|
1587 * and did_throw. Put the exception on the caught stack. */
|
|
|
1588 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT;
|
|
|
1589 did_emsg = got_int = did_throw = FALSE;
|
|
|
1590 catch_exception((except_T *)cstack->cs_exception[idx]);
|
|
|
1591 /* It's mandatory that the current exception is stored in the cstack
|
|
|
1592 * so that it can be discarded at the next ":catch", ":finally", or
|
|
|
1593 * ":endtry" or when the catch clause is left by a ":continue",
|
|
|
1594 * ":break", ":return", ":finish", error, interrupt, or another
|
|
|
1595 * exception. */
|
|
|
1596 if (cstack->cs_exception[cstack->cs_idx] != current_exception)
|
|
|
1597 EMSG(_(e_internal));
|
|
|
1598 }
|
|
|
1599 else
|
|
|
1600 {
|
|
|
1601 /*
|
|
|
1602 * If there is a preceding catch clause and it caught the exception,
|
|
|
1603 * finish the exception now. This happens also after errors except
|
|
|
1604 * when this ":catch" was after the ":finally" or not within
|
|
|
1605 * a ":try". Make the try conditional inactive so that the
|
|
|
1606 * following catch clauses are skipped. On an error or interrupt
|
|
|
1607 * after the preceding try block or catch clause was left by
|
|
|
1608 * a ":continue", ":break", ":return", or ":finish", discard the
|
|
|
1609 * pending action.
|
|
|
1610 */
|
|
|
1611 cleanup_conditionals(cstack, CSF_TRY, TRUE);
|
|
|
1612 }
|
|
|
1613 }
|
|
|
1614
|
|
|
1615 if (end != NULL)
|
|
|
1616 eap->nextcmd = find_nextcmd(end);
|
|
|
1617 }
|
|
|
1618
|
|
|
1619 /*
|
|
|
1620 * ":finally"
|
|
|
1621 */
|
|
|
1622 void
|
|
|
1623 ex_finally(eap)
|
|
|
1624 exarg_T *eap;
|
|
|
1625 {
|
|
|
1626 int idx;
|
|
|
1627 int skip = FALSE;
|
|
|
1628 int pending = CSTP_NONE;
|
|
|
1629 struct condstack *cstack = eap->cstack;
|
|
|
1630
|
|
|
1631 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
|
|
|
1632 eap->errmsg = (char_u *)N_("E606: :finally without :try");
|
|
|
1633 else
|
|
|
1634 {
|
|
|
1635 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
|
|
|
1636 {
|
|
75
|
1637 eap->errmsg = get_end_emsg(cstack);
|
|
7
|
1638 for (idx = cstack->cs_idx - 1; idx > 0; --idx)
|
|
|
1639 if (cstack->cs_flags[idx] & CSF_TRY)
|
|
|
1640 break;
|
|
|
1641 /* Make this error pending, so that the commands in the following
|
|
|
1642 * finally clause can be executed. This overrules also a pending
|
|
|
1643 * ":continue", ":break", ":return", or ":finish". */
|
|
|
1644 pending = CSTP_ERROR;
|
|
|
1645 }
|
|
|
1646 else
|
|
|
1647 idx = cstack->cs_idx;
|
|
|
1648
|
|
|
1649 if (cstack->cs_flags[idx] & CSF_FINALLY)
|
|
|
1650 {
|
|
|
1651 /* Give up for a multiple ":finally" and ignore it. */
|
|
|
1652 eap->errmsg = (char_u *)N_("E607: multiple :finally");
|
|
|
1653 return;
|
|
|
1654 }
|
|
79
|
1655 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
|
|
75
|
1656 &cstack->cs_looplevel);
|
|
7
|
1657
|
|
|
1658 /*
|
|
|
1659 * Don't do something when the corresponding try block never got active
|
|
|
1660 * (because of an inactive surrounding conditional or after an error or
|
|
|
1661 * interrupt or throw) or for a ":finally" without ":try" or a multiple
|
|
|
1662 * ":finally". After every other error (did_emsg or the conditional
|
|
|
1663 * errors detected above) or after an interrupt (got_int) or an
|
|
|
1664 * exception (did_throw), the finally clause must be executed.
|
|
|
1665 */
|
|
|
1666 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
|
|
|
1667
|
|
|
1668 if (!skip)
|
|
|
1669 {
|
|
|
1670 /* When debugging or a breakpoint was encountered, display the
|
|
|
1671 * debug prompt (if not already done). The user then knows that the
|
|
|
1672 * finally clause is executed. */
|
|
|
1673 if (dbg_check_skipped(eap))
|
|
|
1674 {
|
|
|
1675 /* Handle a ">quit" debug command as if an interrupt had
|
|
|
1676 * occurred before the ":finally". That is, discard the
|
|
|
1677 * original exception and replace it by an interrupt
|
|
|
1678 * exception. */
|
|
|
1679 (void)do_intthrow(cstack);
|
|
|
1680 }
|
|
|
1681
|
|
|
1682 /*
|
|
|
1683 * If there is a preceding catch clause and it caught the exception,
|
|
|
1684 * finish the exception now. This happens also after errors except
|
|
|
1685 * when this is a multiple ":finally" or one not within a ":try".
|
|
|
1686 * After an error or interrupt, this also discards a pending
|
|
|
1687 * ":continue", ":break", ":finish", or ":return" from the preceding
|
|
|
1688 * try block or catch clause.
|
|
|
1689 */
|
|
|
1690 cleanup_conditionals(cstack, CSF_TRY, FALSE);
|
|
|
1691
|
|
|
1692 /*
|
|
|
1693 * Make did_emsg, got_int, did_throw pending. If set, they overrule
|
|
|
1694 * a pending ":continue", ":break", ":return", or ":finish". Then
|
|
|
1695 * we have particularly to discard a pending return value (as done
|
|
|
1696 * by the call to cleanup_conditionals() above when did_emsg or
|
|
|
1697 * got_int is set). The pending values are restored by the
|
|
|
1698 * ":endtry", except if there is a new error, interrupt, exception,
|
|
|
1699 * ":continue", ":break", ":return", or ":finish" in the following
|
|
75
|
1700 * finally clause. A missing ":endwhile", ":endfor" or ":endif"
|
|
|
1701 * detected here is treated as if did_emsg and did_throw had
|
|
|
1702 * already been set, respectively in case that the error is not
|
|
|
1703 * converted to an exception, did_throw had already been unset.
|
|
|
1704 * We must not set did_emsg here since that would suppress the
|
|
|
1705 * error message.
|
|
7
|
1706 */
|
|
|
1707 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw)
|
|
|
1708 {
|
|
|
1709 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN)
|
|
|
1710 {
|
|
|
1711 report_discard_pending(CSTP_RETURN,
|
|
68
|
1712 cstack->cs_rettv[cstack->cs_idx]);
|
|
|
1713 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]);
|
|
7
|
1714 }
|
|
|
1715 if (pending == CSTP_ERROR && !did_emsg)
|
|
|
1716 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0;
|
|
|
1717 else
|
|
|
1718 pending |= did_throw ? CSTP_THROW : 0;
|
|
|
1719 pending |= did_emsg ? CSTP_ERROR : 0;
|
|
|
1720 pending |= got_int ? CSTP_INTERRUPT : 0;
|
|
|
1721 cstack->cs_pending[cstack->cs_idx] = pending;
|
|
|
1722
|
|
|
1723 /* It's mandatory that the current exception is stored in the
|
|
|
1724 * cstack so that it can be rethrown at the ":endtry" or be
|
|
|
1725 * discarded if the finally clause is left by a ":continue",
|
|
|
1726 * ":break", ":return", ":finish", error, interrupt, or another
|
|
|
1727 * exception. When emsg() is called for a missing ":endif" or
|
|
75
|
1728 * a missing ":endwhile"/":endfor" detected here, the
|
|
|
1729 * exception will be discarded. */
|
|
79
|
1730 if (did_throw && cstack->cs_exception[cstack->cs_idx]
|
|
|
1731 != current_exception)
|
|
7
|
1732 EMSG(_(e_internal));
|
|
|
1733 }
|
|
|
1734
|
|
|
1735 /*
|
|
75
|
1736 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg,
|
|
22
|
1737 * got_int, and did_throw and make the finally clause active.
|
|
|
1738 * This will happen after emsg() has been called for a missing
|
|
75
|
1739 * ":endif" or a missing ":endwhile"/":endfor" detected here, so
|
|
|
1740 * that the following finally clause will be executed even then.
|
|
7
|
1741 */
|
|
75
|
1742 cstack->cs_lflags |= CSL_HAD_FINA;
|
|
7
|
1743 }
|
|
|
1744 }
|
|
|
1745 }
|
|
|
1746
|
|
|
1747 /*
|
|
|
1748 * ":endtry"
|
|
|
1749 */
|
|
|
1750 void
|
|
|
1751 ex_endtry(eap)
|
|
|
1752 exarg_T *eap;
|
|
|
1753 {
|
|
|
1754 int idx;
|
|
|
1755 int skip;
|
|
|
1756 int rethrow = FALSE;
|
|
|
1757 int pending = CSTP_NONE;
|
|
68
|
1758 void *rettv = NULL;
|
|
7
|
1759 struct condstack *cstack = eap->cstack;
|
|
|
1760
|
|
|
1761 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
|
|
|
1762 eap->errmsg = (char_u *)N_("E602: :endtry without :try");
|
|
|
1763 else
|
|
|
1764 {
|
|
|
1765 /*
|
|
|
1766 * Don't do something after an error, interrupt or throw in the try
|
|
|
1767 * block, catch clause, or finally clause preceding this ":endtry" or
|
|
|
1768 * when an error or interrupt occurred after a ":continue", ":break",
|
|
|
1769 * ":return", or ":finish" in a try block or catch clause preceding this
|
|
|
1770 * ":endtry" or when the try block never got active (because of an
|
|
|
1771 * inactive surrounding conditional or after an error or interrupt or
|
|
|
1772 * throw) or when there is a surrounding conditional and it has been
|
|
|
1773 * made inactive by a ":continue", ":break", ":return", or ":finish" in
|
|
|
1774 * the finally clause. The latter case need not be tested since then
|
|
|
1775 * anything pending has already been discarded. */
|
|
|
1776 skip = did_emsg || got_int || did_throw ||
|
|
|
1777 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
|
|
|
1778
|
|
|
1779 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
|
|
|
1780 {
|
|
75
|
1781 eap->errmsg = get_end_emsg(cstack);
|
|
7
|
1782 /* Find the matching ":try" and report what's missing. */
|
|
|
1783 idx = cstack->cs_idx;
|
|
|
1784 do
|
|
|
1785 --idx;
|
|
|
1786 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY));
|
|
75
|
1787 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
|
|
|
1788 &cstack->cs_looplevel);
|
|
7
|
1789 skip = TRUE;
|
|
|
1790
|
|
|
1791 /*
|
|
|
1792 * If an exception is being thrown, discard it to prevent it from
|
|
|
1793 * being rethrown at the end of this function. It would be
|
|
|
1794 * discarded by the error message, anyway. Resets did_throw.
|
|
|
1795 * This does not affect the script termination due to the error
|
|
|
1796 * since "trylevel" is decremented after emsg() has been called.
|
|
|
1797 */
|
|
|
1798 if (did_throw)
|
|
|
1799 discard_current_exception();
|
|
|
1800 }
|
|
|
1801 else
|
|
|
1802 {
|
|
|
1803 idx = cstack->cs_idx;
|
|
|
1804
|
|
|
1805 /*
|
|
|
1806 * If we stopped with the exception currently being thrown at this
|
|
|
1807 * try conditional since we didn't know that it doesn't have
|
|
|
1808 * a finally clause, we need to rethrow it after closing the try
|
|
|
1809 * conditional.
|
|
|
1810 */
|
|
|
1811 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE)
|
|
|
1812 && !(cstack->cs_flags[idx] & CSF_FINALLY))
|
|
|
1813 rethrow = TRUE;
|
|
|
1814 }
|
|
|
1815
|
|
|
1816 /* If there was no finally clause, show the user when debugging or
|
|
|
1817 * a breakpoint was encountered that the end of the try conditional has
|
|
|
1818 * been reached: display the debug prompt (if not already done). Do
|
|
|
1819 * this on normal control flow or when an exception was thrown, but not
|
|
|
1820 * on an interrupt or error not converted to an exception or when
|
|
|
1821 * a ":break", ":continue", ":return", or ":finish" is pending. These
|
|
|
1822 * actions are carried out immediately.
|
|
|
1823 */
|
|
|
1824 if ((rethrow || (!skip
|
|
|
1825 && !(cstack->cs_flags[idx] & CSF_FINALLY)
|
|
|
1826 && !cstack->cs_pending[idx]))
|
|
|
1827 && dbg_check_skipped(eap))
|
|
|
1828 {
|
|
|
1829 /* Handle a ">quit" debug command as if an interrupt had occurred
|
|
|
1830 * before the ":endtry". That is, throw an interrupt exception and
|
|
|
1831 * set "skip" and "rethrow". */
|
|
|
1832 if (got_int)
|
|
|
1833 {
|
|
|
1834 skip = TRUE;
|
|
|
1835 (void)do_intthrow(cstack);
|
|
|
1836 /* The do_intthrow() call may have reset did_throw or
|
|
|
1837 * cstack->cs_pending[idx].*/
|
|
|
1838 rethrow = FALSE;
|
|
|
1839 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY))
|
|
|
1840 rethrow = TRUE;
|
|
|
1841 }
|
|
|
1842 }
|
|
|
1843
|
|
|
1844 /*
|
|
|
1845 * If a ":return" is pending, we need to resume it after closing the
|
|
|
1846 * try conditional; remember the return value. If there was a finally
|
|
|
1847 * clause making an exception pending, we need to rethrow it. Make it
|
|
|
1848 * the exception currently being thrown.
|
|
|
1849 */
|
|
|
1850 if (!skip)
|
|
|
1851 {
|
|
|
1852 pending = cstack->cs_pending[idx];
|
|
|
1853 cstack->cs_pending[idx] = CSTP_NONE;
|
|
|
1854 if (pending == CSTP_RETURN)
|
|
68
|
1855 rettv = cstack->cs_rettv[idx];
|
|
7
|
1856 else if (pending & CSTP_THROW)
|
|
|
1857 current_exception = cstack->cs_exception[idx];
|
|
|
1858 }
|
|
|
1859
|
|
|
1860 /*
|
|
|
1861 * Discard anything pending on an error, interrupt, or throw in the
|
|
|
1862 * finally clause. If there was no ":finally", discard a pending
|
|
|
1863 * ":continue", ":break", ":return", or ":finish" if an error or
|
|
|
1864 * interrupt occurred afterwards, but before the ":endtry" was reached.
|
|
|
1865 * If an exception was caught by the last of the catch clauses and there
|
|
|
1866 * was no finally clause, finish the exception now. This happens also
|
|
|
1867 * after errors except when this ":endtry" is not within a ":try".
|
|
|
1868 * Restore "emsg_silent" if it has been reset by this try conditional.
|
|
|
1869 */
|
|
840
|
1870 (void)cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE);
|
|
7
|
1871
|
|
|
1872 --cstack->cs_idx;
|
|
|
1873 --cstack->cs_trylevel;
|
|
|
1874
|
|
|
1875 if (!skip)
|
|
|
1876 {
|
|
|
1877 report_resume_pending(pending,
|
|
68
|
1878 (pending == CSTP_RETURN) ? rettv :
|
|
7
|
1879 (pending & CSTP_THROW) ? (void *)current_exception : NULL);
|
|
|
1880 switch (pending)
|
|
|
1881 {
|
|
|
1882 case CSTP_NONE:
|
|
|
1883 break;
|
|
|
1884
|
|
|
1885 /* Reactivate a pending ":continue", ":break", ":return",
|
|
|
1886 * ":finish" from the try block or a catch clause of this try
|
|
|
1887 * conditional. This is skipped, if there was an error in an
|
|
|
1888 * (unskipped) conditional command or an interrupt afterwards
|
|
|
1889 * or if the finally clause is present and executed a new error,
|
|
|
1890 * interrupt, throw, ":continue", ":break", ":return", or
|
|
|
1891 * ":finish". */
|
|
|
1892 case CSTP_CONTINUE:
|
|
|
1893 ex_continue(eap);
|
|
|
1894 break;
|
|
|
1895 case CSTP_BREAK:
|
|
|
1896 ex_break(eap);
|
|
|
1897 break;
|
|
|
1898 case CSTP_RETURN:
|
|
68
|
1899 do_return(eap, FALSE, FALSE, rettv);
|
|
7
|
1900 break;
|
|
|
1901 case CSTP_FINISH:
|
|
|
1902 do_finish(eap, FALSE);
|
|
|
1903 break;
|
|
|
1904
|
|
|
1905 /* When the finally clause was entered due to an error,
|
|
|
1906 * interrupt or throw (as opposed to a ":continue", ":break",
|
|
|
1907 * ":return", or ":finish"), restore the pending values of
|
|
|
1908 * did_emsg, got_int, and did_throw. This is skipped, if there
|
|
|
1909 * was a new error, interrupt, throw, ":continue", ":break",
|
|
|
1910 * ":return", or ":finish". in the finally clause. */
|
|
|
1911 default:
|
|
|
1912 if (pending & CSTP_ERROR)
|
|
|
1913 did_emsg = TRUE;
|
|
|
1914 if (pending & CSTP_INTERRUPT)
|
|
|
1915 got_int = TRUE;
|
|
|
1916 if (pending & CSTP_THROW)
|
|
|
1917 rethrow = TRUE;
|
|
|
1918 break;
|
|
|
1919 }
|
|
|
1920 }
|
|
|
1921
|
|
|
1922 if (rethrow)
|
|
|
1923 /* Rethrow the current exception (within this cstack). */
|
|
|
1924 do_throw(cstack);
|
|
|
1925 }
|
|
|
1926 }
|
|
|
1927
|
|
|
1928 /*
|
|
36
|
1929 * enter_cleanup() and leave_cleanup()
|
|
|
1930 *
|
|
|
1931 * Functions to be called before/after invoking a sequence of autocommands for
|
|
|
1932 * cleanup for a failed command. (Failure means here that a call to emsg()
|
|
|
1933 * has been made, an interrupt occurred, or there is an uncaught exception
|
|
|
1934 * from a previous autocommand execution of the same command.)
|
|
24
|
1935 *
|
|
36
|
1936 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same
|
|
|
1937 * pointer to leave_cleanup(). The cleanup_T structure stores the pending
|
|
|
1938 * error/interrupt/exception state.
|
|
|
1939 */
|
|
|
1940
|
|
|
1941 /*
|
|
|
1942 * This function works a bit like ex_finally() except that there was not
|
|
|
1943 * actually an extra try block around the part that failed and an error or
|
|
|
1944 * interrupt has not (yet) been converted to an exception. This function
|
|
|
1945 * saves the error/interrupt/ exception state and prepares for the call to
|
|
|
1946 * do_cmdline() that is going to be made for the cleanup autocommand
|
|
|
1947 * execution.
|
|
24
|
1948 */
|
|
|
1949 void
|
|
|
1950 enter_cleanup(csp)
|
|
|
1951 cleanup_T *csp;
|
|
|
1952 {
|
|
|
1953 int pending = CSTP_NONE;
|
|
|
1954
|
|
|
1955 /*
|
|
|
1956 * Postpone did_emsg, got_int, did_throw. The pending values will be
|
|
|
1957 * restored by leave_cleanup() except if there was an aborting error,
|
|
|
1958 * interrupt, or uncaught exception after this function ends.
|
|
|
1959 */
|
|
|
1960 if (did_emsg || got_int || did_throw || need_rethrow)
|
|
|
1961 {
|
|
|
1962 csp->pending = (did_emsg ? CSTP_ERROR : 0)
|
|
|
1963 | (got_int ? CSTP_INTERRUPT : 0)
|
|
|
1964 | (did_throw ? CSTP_THROW : 0)
|
|
|
1965 | (need_rethrow ? CSTP_THROW : 0);
|
|
|
1966
|
|
|
1967 /* If we are currently throwing an exception (did_throw), save it as
|
|
|
1968 * well. On an error not yet converted to an exception, update
|
|
|
1969 * "force_abort" and reset "cause_abort" (as do_errthrow() would do).
|
|
|
1970 * This is needed for the do_cmdline() call that is going to be made
|
|
|
1971 * for autocommand execution. We need not save *msg_list because
|
|
|
1972 * there is an extra instance for every call of do_cmdline(), anyway.
|
|
|
1973 */
|
|
|
1974 if (did_throw || need_rethrow)
|
|
|
1975 csp->exception = current_exception;
|
|
|
1976 else
|
|
|
1977 {
|
|
|
1978 csp->exception = NULL;
|
|
|
1979 if (did_emsg)
|
|
|
1980 {
|
|
|
1981 force_abort |= cause_abort;
|
|
|
1982 cause_abort = FALSE;
|
|
|
1983 }
|
|
|
1984 }
|
|
|
1985 did_emsg = got_int = did_throw = need_rethrow = FALSE;
|
|
|
1986
|
|
|
1987 /* Report if required by the 'verbose' option or when debugging. */
|
|
|
1988 report_make_pending(pending, csp->exception);
|
|
|
1989 }
|
|
|
1990 else
|
|
|
1991 {
|
|
|
1992 csp->pending = CSTP_NONE;
|
|
|
1993 csp->exception = NULL;
|
|
|
1994 }
|
|
|
1995 }
|
|
|
1996
|
|
|
1997 /*
|
|
36
|
1998 * See comment above enter_cleanup() for how this function is used.
|
|
|
1999 *
|
|
|
2000 * This function is a bit like ex_endtry() except that there was not actually
|
|
|
2001 * an extra try block around the part that failed and an error or interrupt
|
|
|
2002 * had not (yet) been converted to an exception when the cleanup autocommand
|
|
|
2003 * sequence was invoked.
|
|
|
2004 *
|
|
|
2005 * This function has to be called with the address of the cleanup_T structure
|
|
|
2006 * filled by enter_cleanup() as an argument; it restores the error/interrupt/
|
|
|
2007 * exception state saved by that function - except there was an aborting
|
|
|
2008 * error, an interrupt or an uncaught exception during execution of the
|
|
|
2009 * cleanup autocommands. In the latter case, the saved error/interrupt/
|
|
|
2010 * exception state is discarded.
|
|
24
|
2011 */
|
|
|
2012 void
|
|
|
2013 leave_cleanup(csp)
|
|
|
2014 cleanup_T *csp;
|
|
|
2015 {
|
|
|
2016 int pending = csp->pending;
|
|
|
2017
|
|
|
2018 if (pending == CSTP_NONE) /* nothing to do */
|
|
|
2019 return;
|
|
|
2020
|
|
|
2021 /* If there was an aborting error, an interrupt, or an uncaught exception
|
|
|
2022 * after the corresponding call to enter_cleanup(), discard what has been
|
|
|
2023 * made pending by it. Report this to the user if required by the
|
|
|
2024 * 'verbose' option or when debugging. */
|
|
|
2025 if (aborting() || need_rethrow)
|
|
|
2026 {
|
|
|
2027 if (pending & CSTP_THROW)
|
|
|
2028 /* Cancel the pending exception (includes report). */
|
|
|
2029 discard_exception((except_T *)csp->exception, FALSE);
|
|
|
2030 else
|
|
|
2031 report_discard_pending(pending, NULL);
|
|
|
2032
|
|
|
2033 /* If an error was about to be converted to an exception when
|
|
|
2034 * enter_cleanup() was called, free the message list. */
|
|
1046
|
2035 if (msg_list != NULL)
|
|
|
2036 {
|
|
|
2037 free_msglist(*msg_list);
|
|
|
2038 *msg_list = NULL;
|
|
|
2039 }
|
|
24
|
2040 }
|
|
|
2041
|
|
|
2042 /*
|
|
|
2043 * If there was no new error, interrupt, or throw between the calls
|
|
|
2044 * to enter_cleanup() and leave_cleanup(), restore the pending
|
|
|
2045 * error/interrupt/exception state.
|
|
|
2046 */
|
|
|
2047 else
|
|
|
2048 {
|
|
|
2049 /*
|
|
|
2050 * If there was an exception being thrown when enter_cleanup() was
|
|
|
2051 * called, we need to rethrow it. Make it the exception currently
|
|
|
2052 * being thrown.
|
|
|
2053 */
|
|
|
2054 if (pending & CSTP_THROW)
|
|
|
2055 current_exception = csp->exception;
|
|
|
2056
|
|
|
2057 /*
|
|
|
2058 * If an error was about to be converted to an exception when
|
|
|
2059 * enter_cleanup() was called, let "cause_abort" take the part of
|
|
|
2060 * "force_abort" (as done by cause_errthrow()).
|
|
|
2061 */
|
|
|
2062 else if (pending & CSTP_ERROR)
|
|
|
2063 {
|
|
|
2064 cause_abort = force_abort;
|
|
|
2065 force_abort = FALSE;
|
|
|
2066 }
|
|
|
2067
|
|
|
2068 /*
|
|
|
2069 * Restore the pending values of did_emsg, got_int, and did_throw.
|
|
|
2070 */
|
|
|
2071 if (pending & CSTP_ERROR)
|
|
|
2072 did_emsg = TRUE;
|
|
|
2073 if (pending & CSTP_INTERRUPT)
|
|
|
2074 got_int = TRUE;
|
|
|
2075 if (pending & CSTP_THROW)
|
|
|
2076 need_rethrow = TRUE; /* did_throw will be set by do_one_cmd() */
|
|
|
2077
|
|
|
2078 /* Report if required by the 'verbose' option or when debugging. */
|
|
|
2079 report_resume_pending(pending,
|
|
36
|
2080 (pending & CSTP_THROW) ? (void *)current_exception : NULL);
|
|
24
|
2081 }
|
|
|
2082 }
|
|
|
2083
|
|
|
2084
|
|
|
2085 /*
|
|
7
|
2086 * Make conditionals inactive and discard what's pending in finally clauses
|
|
|
2087 * until the conditional type searched for or a try conditional not in its
|
|
79
|
2088 * finally clause is reached. If this is in an active catch clause, finish
|
|
|
2089 * the caught exception.
|
|
|
2090 * Return the cstack index where the search stopped.
|
|
75
|
2091 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0,
|
|
|
2092 * the latter meaning the innermost try conditional not in its finally clause.
|
|
|
2093 * "inclusive" tells whether the conditional searched for should be made
|
|
|
2094 * inactive itself (a try conditional not in its finally claused possibly find
|
|
|
2095 * before is always made inactive). If "inclusive" is TRUE and
|
|
|
2096 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of
|
|
|
2097 * "emsg_silent", if reset when the try conditional finally reached was
|
|
|
2098 * entered, is restored (unsed by ex_endtry()). This is normally done only
|
|
|
2099 * when such a try conditional is left.
|
|
7
|
2100 */
|
|
|
2101 int
|
|
|
2102 cleanup_conditionals(cstack, searched_cond, inclusive)
|
|
|
2103 struct condstack *cstack;
|
|
|
2104 int searched_cond;
|
|
|
2105 int inclusive;
|
|
|
2106 {
|
|
|
2107 int idx;
|
|
|
2108 int stop = FALSE;
|
|
|
2109
|
|
|
2110 for (idx = cstack->cs_idx; idx >= 0; --idx)
|
|
|
2111 {
|
|
|
2112 if (cstack->cs_flags[idx] & CSF_TRY)
|
|
|
2113 {
|
|
|
2114 /*
|
|
|
2115 * Discard anything pending in a finally clause and continue the
|
|
|
2116 * search. There may also be a pending ":continue", ":break",
|
|
|
2117 * ":return", or ":finish" before the finally clause. We must not
|
|
|
2118 * discard it, unless an error or interrupt occurred afterwards.
|
|
|
2119 */
|
|
359
|
2120 if (did_emsg || got_int || (cstack->cs_flags[idx] & CSF_FINALLY))
|
|
7
|
2121 {
|
|
|
2122 switch (cstack->cs_pending[idx])
|
|
|
2123 {
|
|
|
2124 case CSTP_NONE:
|
|
|
2125 break;
|
|
|
2126
|
|
|
2127 case CSTP_CONTINUE:
|
|
|
2128 case CSTP_BREAK:
|
|
|
2129 case CSTP_FINISH:
|
|
|
2130 report_discard_pending(cstack->cs_pending[idx], NULL);
|
|
|
2131 cstack->cs_pending[idx] = CSTP_NONE;
|
|
|
2132 break;
|
|
|
2133
|
|
|
2134 case CSTP_RETURN:
|
|
|
2135 report_discard_pending(CSTP_RETURN,
|
|
68
|
2136 cstack->cs_rettv[idx]);
|
|
|
2137 discard_pending_return(cstack->cs_rettv[idx]);
|
|
7
|
2138 cstack->cs_pending[idx] = CSTP_NONE;
|
|
|
2139 break;
|
|
|
2140
|
|
|
2141 default:
|
|
|
2142 if (cstack->cs_flags[idx] & CSF_FINALLY)
|
|
|
2143 {
|
|
|
2144 if (cstack->cs_pending[idx] & CSTP_THROW)
|
|
|
2145 {
|
|
|
2146 /* Cancel the pending exception. This is in the
|
|
|
2147 * finally clause, so that the stack of the
|
|
|
2148 * caught exceptions is not involved. */
|
|
|
2149 discard_exception((except_T *)
|
|
|
2150 cstack->cs_exception[idx],
|
|
|
2151 FALSE);
|
|
|
2152 }
|
|
|
2153 else
|
|
|
2154 report_discard_pending(cstack->cs_pending[idx],
|
|
|
2155 NULL);
|
|
|
2156 cstack->cs_pending[idx] = CSTP_NONE;
|
|
|
2157 }
|
|
|
2158 break;
|
|
|
2159 }
|
|
|
2160 }
|
|
|
2161
|
|
|
2162 /*
|
|
|
2163 * Stop at a try conditional not in its finally clause. If this try
|
|
|
2164 * conditional is in an active catch clause, finish the caught
|
|
|
2165 * exception.
|
|
|
2166 */
|
|
|
2167 if (!(cstack->cs_flags[idx] & CSF_FINALLY))
|
|
|
2168 {
|
|
|
2169 if ((cstack->cs_flags[idx] & CSF_ACTIVE)
|
|
|
2170 && (cstack->cs_flags[idx] & CSF_CAUGHT))
|
|
|
2171 finish_exception((except_T *)cstack->cs_exception[idx]);
|
|
|
2172 /* Stop at this try conditional - except the try block never
|
|
|
2173 * got active (because of an inactive surrounding conditional
|
|
|
2174 * or when the ":try" appeared after an error or interrupt or
|
|
|
2175 * throw). */
|
|
|
2176 if (cstack->cs_flags[idx] & CSF_TRUE)
|
|
|
2177 {
|
|
|
2178 if (searched_cond == 0 && !inclusive)
|
|
|
2179 break;
|
|
|
2180 stop = TRUE;
|
|
|
2181 }
|
|
|
2182 }
|
|
|
2183 }
|
|
|
2184
|
|
|
2185 /* Stop on the searched conditional type (even when the surrounding
|
|
|
2186 * conditional is not active or something has been made pending).
|
|
|
2187 * If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT,
|
|
|
2188 * check first whether "emsg_silent" needs to be restored. */
|
|
|
2189 if (cstack->cs_flags[idx] & searched_cond)
|
|
|
2190 {
|
|
|
2191 if (!inclusive)
|
|
|
2192 break;
|
|
|
2193 stop = TRUE;
|
|
|
2194 }
|
|
|
2195 cstack->cs_flags[idx] &= ~CSF_ACTIVE;
|
|
|
2196 if (stop && searched_cond != (CSF_TRY | CSF_SILENT))
|
|
|
2197 break;
|
|
|
2198
|
|
|
2199 /*
|
|
1214
|
2200 * When leaving a try conditional that reset "emsg_silent" on its
|
|
|
2201 * entry after saving the original value, restore that value here and
|
|
|
2202 * free the memory used to store it.
|
|
7
|
2203 */
|
|
|
2204 if ((cstack->cs_flags[idx] & CSF_TRY)
|
|
359
|
2205 && (cstack->cs_flags[idx] & CSF_SILENT))
|
|
7
|
2206 {
|
|
|
2207 eslist_T *elem;
|
|
|
2208
|
|
|
2209 elem = cstack->cs_emsg_silent_list;
|
|
|
2210 cstack->cs_emsg_silent_list = elem->next;
|
|
|
2211 emsg_silent = elem->saved_emsg_silent;
|
|
|
2212 vim_free(elem);
|
|
|
2213 cstack->cs_flags[idx] &= ~CSF_SILENT;
|
|
|
2214 }
|
|
|
2215 if (stop)
|
|
|
2216 break;
|
|
|
2217 }
|
|
|
2218 return idx;
|
|
|
2219 }
|
|
|
2220
|
|
|
2221 /*
|
|
75
|
2222 * Return an appropriate error message for a missing endwhile/endfor/endif.
|
|
|
2223 */
|
|
|
2224 static char_u *
|
|
|
2225 get_end_emsg(cstack)
|
|
|
2226 struct condstack *cstack;
|
|
|
2227 {
|
|
|
2228 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE)
|
|
|
2229 return e_endwhile;
|
|
|
2230 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
|
|
|
2231 return e_endfor;
|
|
|
2232 return e_endif;
|
|
|
2233 }
|
|
|
2234
|
|
|
2235
|
|
|
2236 /*
|
|
7
|
2237 * Rewind conditionals until index "idx" is reached. "cond_type" and
|
|
|
2238 * "cond_level" specify a conditional type and the address of a level variable
|
|
|
2239 * which is to be decremented with each skipped conditional of the specified
|
|
|
2240 * type.
|
|
79
|
2241 * Also free "for info" structures where needed.
|
|
7
|
2242 */
|
|
79
|
2243 void
|
|
7
|
2244 rewind_conditionals(cstack, idx, cond_type, cond_level)
|
|
|
2245 struct condstack *cstack;
|
|
|
2246 int idx;
|
|
|
2247 int cond_type;
|
|
|
2248 int *cond_level;
|
|
|
2249 {
|
|
|
2250 while (cstack->cs_idx > idx)
|
|
|
2251 {
|
|
|
2252 if (cstack->cs_flags[cstack->cs_idx] & cond_type)
|
|
|
2253 --*cond_level;
|
|
79
|
2254 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
|
|
|
2255 free_for_info(cstack->cs_forinfo[cstack->cs_idx]);
|
|
7
|
2256 --cstack->cs_idx;
|
|
|
2257 }
|
|
|
2258 }
|
|
|
2259
|
|
|
2260 /*
|
|
|
2261 * ":endfunction" when not after a ":function"
|
|
|
2262 */
|
|
|
2263 void
|
|
|
2264 ex_endfunction(eap)
|
|
1880
|
2265 exarg_T *eap UNUSED;
|
|
7
|
2266 {
|
|
|
2267 EMSG(_("E193: :endfunction not inside a function"));
|
|
|
2268 }
|
|
|
2269
|
|
|
2270 /*
|
|
75
|
2271 * Return TRUE if the string "p" looks like a ":while" or ":for" command.
|
|
7
|
2272 */
|
|
|
2273 int
|
|
75
|
2274 has_loop_cmd(p)
|
|
7
|
2275 char_u *p;
|
|
|
2276 {
|
|
1447
|
2277 int len;
|
|
|
2278
|
|
|
2279 /* skip modifiers, white space and ':' */
|
|
|
2280 for (;;)
|
|
|
2281 {
|
|
|
2282 while (*p == ' ' || *p == '\t' || *p == ':')
|
|
|
2283 ++p;
|
|
|
2284 len = modifier_len(p);
|
|
|
2285 if (len == 0)
|
|
|
2286 break;
|
|
|
2287 p += len;
|
|
|
2288 }
|
|
75
|
2289 if ((p[0] == 'w' && p[1] == 'h')
|
|
|
2290 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r'))
|
|
7
|
2291 return TRUE;
|
|
|
2292 return FALSE;
|
|
|
2293 }
|
|
|
2294
|
|
|
2295 #endif /* FEAT_EVAL */
|
