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