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 */
|
|
382 if (did_throw)
|
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383 discard_current_exception();
|
|
384 }
|
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385 else
|
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386 #endif
|
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387 {
|
|
388 /*
|
|
389 * Throw an interrupt exception, so that everything will be aborted
|
|
390 * (except for executing finally clauses), until the interrupt exception
|
|
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
|
|
393 * being thrown, do nothing.
|
|
394 *
|
|
395 */
|
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396 if (did_throw)
|
|
397 {
|
|
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. */
|
|
402 discard_current_exception();
|
|
403 }
|
|
404 if (throw_exception("Vim:Interrupt", ET_INTERRUPT, NULL) != FAIL)
|
|
405 do_throw(cstack);
|
|
406 }
|
|
407
|
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408 return TRUE;
|
|
409 }
|
|
410
|
|
411
|
|
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
|
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419 throw_exception(value, type, cmdname)
|
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420 void *value;
|
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421 int type;
|
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422 char_u *cmdname;
|
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423 {
|
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424 except_T *excp;
|
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425 char_u *p, *mesg, *val;
|
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426 int cmdlen;
|
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427
|
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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 &&
|
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436 (((char_u *)value)[3] == NUL || ((char_u *)value)[3] == ':' ||
|
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437 ((char_u *)value)[3] == '('))
|
|
438 {
|
|
439 EMSG(_("E608: Cannot :throw exceptions with 'Vim' prefix"));
|
|
440 goto fail;
|
|
441 }
|
|
442 }
|
|
443
|
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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 {
|
|
487 if (*p == NUL || p == mesg) /* 'E123' missing or at beginning */
|
|
488 STRCAT(val, mesg);
|
|
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 */
|
|
526 ++no_wait_return;
|
|
527 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
528 msg_str((char_u *)_("Exception thrown: %s"), excp->value);
|
|
529 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
530 cmdline_row = msg_row;
|
|
531 --no_wait_return;
|
|
532 if (debug_break_level > 0)
|
|
533 msg_silent = save_msg_silent;
|
|
534 }
|
|
535
|
|
536 current_exception = excp;
|
|
537 return OK;
|
|
538
|
|
539 nomem:
|
|
540 vim_free(excp);
|
|
541 suppress_errthrow = TRUE;
|
|
542 EMSG(_(e_outofmem));
|
|
543 fail:
|
|
544 current_exception = NULL;
|
|
545 return FAIL;
|
|
546 }
|
|
547
|
|
548 /*
|
|
549 * Discard an exception. "was_finished" is set when the exception has been
|
|
550 * caught and the catch clause has been ended normally.
|
|
551 */
|
|
552 static void
|
|
553 discard_exception(excp, was_finished)
|
|
554 except_T *excp;
|
|
555 int was_finished;
|
|
556 {
|
|
557 char_u *saved_IObuff;
|
|
558
|
|
559 if (excp == NULL)
|
|
560 {
|
|
561 EMSG(_(e_internal));
|
|
562 return;
|
|
563 }
|
|
564
|
|
565 if (p_verbose >= 13 || debug_break_level > 0)
|
|
566 {
|
|
567 int save_msg_silent = msg_silent;
|
|
568
|
|
569 saved_IObuff = vim_strsave(IObuff);
|
|
570 if (debug_break_level > 0)
|
|
571 msg_silent = FALSE; /* display messages */
|
|
572 ++no_wait_return;
|
|
573 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
574 msg_str(was_finished
|
|
575 ? (char_u *)_("Exception finished: %s")
|
|
576 : (char_u *)_("Exception discarded: %s"),
|
|
577 excp->value);
|
|
578 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
579 cmdline_row = msg_row;
|
|
580 --no_wait_return;
|
|
581 if (debug_break_level > 0)
|
|
582 msg_silent = save_msg_silent;
|
|
583 STRCPY(IObuff, saved_IObuff);
|
|
584 vim_free(saved_IObuff);
|
|
585 }
|
|
586 if (excp->type != ET_INTERRUPT)
|
|
587 vim_free(excp->value);
|
|
588 if (excp->type == ET_ERROR)
|
|
589 free_msglist(excp->messages);
|
|
590 vim_free(excp->throw_name);
|
|
591 vim_free(excp);
|
|
592 }
|
|
593
|
|
594 /*
|
|
595 * Discard the exception currently being thrown.
|
|
596 */
|
|
597 void
|
|
598 discard_current_exception()
|
|
599 {
|
|
600 discard_exception(current_exception, FALSE);
|
|
601 current_exception = NULL;
|
|
602 did_throw = FALSE;
|
|
603 need_rethrow = FALSE;
|
|
604 }
|
|
605
|
|
606 /*
|
|
607 * Put an exception on the caught stack.
|
|
608 */
|
|
609 static void
|
|
610 catch_exception(excp)
|
|
611 except_T *excp;
|
|
612 {
|
|
613 excp->caught = caught_stack;
|
|
614 caught_stack = excp;
|
|
615 set_vim_var_string(VV_EXCEPTION, excp->value, -1);
|
|
616 if (*excp->throw_name != NUL)
|
|
617 {
|
|
618 if (excp->throw_lnum != 0)
|
|
619 sprintf((char *)IObuff, _("%s, line %ld"), excp->throw_name,
|
|
620 (long)excp->throw_lnum);
|
|
621 else
|
|
622 STRCPY(IObuff, excp->throw_name);
|
|
623 set_vim_var_string(VV_THROWPOINT, IObuff, -1);
|
|
624 }
|
|
625 else
|
|
626 /* throw_name not set on an exception from a command that was typed. */
|
|
627 set_vim_var_string(VV_THROWPOINT, NULL, -1);
|
|
628
|
|
629 if (p_verbose >= 13 || debug_break_level > 0)
|
|
630 {
|
|
631 int save_msg_silent = msg_silent;
|
|
632
|
|
633 if (debug_break_level > 0)
|
|
634 msg_silent = FALSE; /* display messages */
|
|
635 ++no_wait_return;
|
|
636 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
637 msg_str((char_u *)_("Exception caught: %s"), excp->value);
|
|
638 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
639 cmdline_row = msg_row;
|
|
640 --no_wait_return;
|
|
641 if (debug_break_level > 0)
|
|
642 msg_silent = save_msg_silent;
|
|
643 }
|
|
644 }
|
|
645
|
|
646 /*
|
|
647 * Remove an exception from the caught stack.
|
|
648 */
|
|
649 static void
|
|
650 finish_exception(excp)
|
|
651 except_T *excp;
|
|
652 {
|
|
653 if (excp != caught_stack)
|
|
654 EMSG(_(e_internal));
|
|
655 caught_stack = caught_stack->caught;
|
|
656 if (caught_stack != NULL)
|
|
657 {
|
|
658 set_vim_var_string(VV_EXCEPTION, caught_stack->value, -1);
|
|
659 if (*caught_stack->throw_name != NUL)
|
|
660 {
|
|
661 if (caught_stack->throw_lnum != 0)
|
|
662 sprintf((char *)IObuff,
|
|
663 _("%s, line %ld"), caught_stack->throw_name,
|
|
664 (long)caught_stack->throw_lnum);
|
|
665 else
|
|
666 STRCPY(IObuff, caught_stack->throw_name);
|
|
667 set_vim_var_string(VV_THROWPOINT, IObuff, -1);
|
|
668 }
|
|
669 else
|
|
670 /* throw_name not set on an exception from a command that was
|
|
671 * typed. */
|
|
672 set_vim_var_string(VV_THROWPOINT, NULL, -1);
|
|
673 }
|
|
674 else
|
|
675 {
|
|
676 set_vim_var_string(VV_EXCEPTION, NULL, -1);
|
|
677 set_vim_var_string(VV_THROWPOINT, NULL, -1);
|
|
678 }
|
|
679
|
|
680 /* Discard the exception, but use the finish message for 'verbose'. */
|
|
681 discard_exception(excp, TRUE);
|
|
682 }
|
|
683
|
|
684 /*
|
|
685 * Flags specifying the message displayed by report_pending.
|
|
686 */
|
|
687 #define RP_MAKE 0
|
|
688 #define RP_RESUME 1
|
|
689 #define RP_DISCARD 2
|
|
690
|
|
691 /*
|
|
692 * Report information about something pending in a finally clause if required by
|
|
693 * the 'verbose' option or when debugging. "action" tells whether something is
|
|
694 * made pending or something pending is resumed or discarded. "pending" tells
|
|
695 * what is pending. "value" specifies the return value for a pending ":return"
|
|
696 * or the exception value for a pending exception.
|
|
697 */
|
|
698 static void
|
|
699 report_pending(action, pending, value)
|
|
700 int action;
|
|
701 int pending;
|
|
702 void *value;
|
|
703 {
|
|
704 char_u *mesg;
|
|
705 char *s;
|
|
706 int save_msg_silent;
|
|
707
|
|
708
|
|
709 switch (action)
|
|
710 {
|
|
711 case RP_MAKE:
|
|
712 mesg = (char_u *)_("%s made pending");
|
|
713 break;
|
|
714 case RP_RESUME:
|
|
715 mesg = (char_u *)_("%s resumed");
|
|
716 break;
|
|
717 /* case RP_DISCARD: */
|
|
718 default:
|
|
719 mesg = (char_u *)_("%s discarded");
|
|
720 break;
|
|
721 }
|
|
722
|
|
723 switch (pending)
|
|
724 {
|
|
725 case CSTP_NONE:
|
|
726 return;
|
|
727
|
|
728 case CSTP_CONTINUE:
|
|
729 s = ":continue";
|
|
730 break;
|
|
731 case CSTP_BREAK:
|
|
732 s = ":break";
|
|
733 break;
|
|
734 case CSTP_FINISH:
|
|
735 s = ":finish";
|
|
736 break;
|
|
737 case CSTP_RETURN:
|
|
738 /* ":return" command producing value, allocated */
|
|
739 s = (char *)get_return_cmd(value);
|
|
740 break;
|
|
741
|
|
742 default:
|
|
743 if (pending & CSTP_THROW)
|
|
744 {
|
|
745 sprintf((char *)IObuff, (char *)mesg, _("Exception"));
|
|
746 mesg = vim_strnsave(IObuff, (int)STRLEN(IObuff) + 4);
|
|
747 STRCAT(mesg, ": %s");
|
|
748 s = (char *)((except_T *)value)->value;
|
|
749 }
|
|
750 else if ((pending & CSTP_ERROR) && (pending & CSTP_INTERRUPT))
|
|
751 s = _("Error and interrupt");
|
|
752 else if (pending & CSTP_ERROR)
|
|
753 s = _("Error");
|
|
754 else /* if (pending & CSTP_INTERRUPT) */
|
|
755 s = _("Interrupt");
|
|
756 }
|
|
757
|
|
758 save_msg_silent = msg_silent;
|
|
759 if (debug_break_level > 0)
|
|
760 msg_silent = FALSE; /* display messages */
|
|
761 ++no_wait_return;
|
|
762 msg_scroll = TRUE; /* always scroll up, don't overwrite */
|
|
763 msg_str(mesg, (char_u *)s);
|
|
764 msg_puts((char_u *)"\n"); /* don't overwrite this either */
|
|
765 cmdline_row = msg_row;
|
|
766 --no_wait_return;
|
|
767 if (debug_break_level > 0)
|
|
768 msg_silent = save_msg_silent;
|
|
769
|
|
770 if (pending == CSTP_RETURN)
|
|
771 vim_free(s);
|
|
772 else if (pending & CSTP_THROW)
|
|
773 vim_free(mesg);
|
|
774 }
|
|
775
|
|
776 /*
|
|
777 * If something is made pending in a finally clause, report it if required by
|
|
778 * the 'verbose' option or when debugging.
|
|
779 */
|
|
780 void
|
|
781 report_make_pending(pending, value)
|
|
782 int pending;
|
|
783 void *value;
|
|
784 {
|
|
785 if (p_verbose >= 14 || debug_break_level > 0)
|
|
786 report_pending(RP_MAKE, pending, value);
|
|
787 }
|
|
788
|
|
789 /*
|
|
790 * If something pending in a finally clause is resumed at the ":endtry", report
|
|
791 * it if required by the 'verbose' option or when debugging.
|
|
792 */
|
|
793 void
|
|
794 report_resume_pending(pending, value)
|
|
795 int pending;
|
|
796 void *value;
|
|
797 {
|
|
798 if (p_verbose >= 14 || debug_break_level > 0)
|
|
799 report_pending(RP_RESUME, pending, value);
|
|
800 }
|
|
801
|
|
802 /*
|
|
803 * If something pending in a finally clause is discarded, report it if required
|
|
804 * by the 'verbose' option or when debugging.
|
|
805 */
|
|
806 void
|
|
807 report_discard_pending(pending, value)
|
|
808 int pending;
|
|
809 void *value;
|
|
810 {
|
|
811 if (p_verbose >= 14 || debug_break_level > 0)
|
|
812 report_pending(RP_DISCARD, pending, value);
|
|
813 }
|
|
814
|
|
815
|
|
816 /*
|
|
817 * ":if".
|
|
818 */
|
|
819 void
|
|
820 ex_if(eap)
|
|
821 exarg_T *eap;
|
|
822 {
|
|
823 int error;
|
|
824 int skip;
|
|
825 int result;
|
|
826 struct condstack *cstack = eap->cstack;
|
|
827
|
|
828 if (cstack->cs_idx == CSTACK_LEN - 1)
|
|
829 eap->errmsg = (char_u *)N_("E579: :if nesting too deep");
|
|
830 else
|
|
831 {
|
|
832 ++cstack->cs_idx;
|
|
833 cstack->cs_flags[cstack->cs_idx] = 0;
|
|
834
|
|
835 /*
|
|
836 * Don't do something after an error, interrupt, or throw, or when there
|
|
837 * is a surrounding conditional and it was not active.
|
|
838 */
|
|
839 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
840 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
841
|
|
842 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
|
|
843
|
|
844 if (!skip && !error)
|
|
845 {
|
|
846 if (result)
|
|
847 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
|
|
848 }
|
|
849 else
|
|
850 /* set TRUE, so this conditional will never get active */
|
|
851 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
|
|
852 }
|
|
853 }
|
|
854
|
|
855 /*
|
|
856 * ":endif".
|
|
857 */
|
|
858 void
|
|
859 ex_endif(eap)
|
|
860 exarg_T *eap;
|
|
861 {
|
|
862 did_endif = TRUE;
|
|
863 if (eap->cstack->cs_idx < 0
|
79
|
864 || (eap->cstack->cs_flags[eap->cstack->cs_idx]
|
|
865 & (CSF_WHILE | CSF_FOR | CSF_TRY)))
|
7
|
866 eap->errmsg = (char_u *)N_("E580: :endif without :if");
|
|
867 else
|
|
868 {
|
|
869 /*
|
|
870 * When debugging or a breakpoint was encountered, display the debug
|
|
871 * prompt (if not already done). This shows the user that an ":endif"
|
|
872 * is executed when the ":if" or a previous ":elseif" was not TRUE.
|
|
873 * Handle a ">quit" debug command as if an interrupt had occurred before
|
|
874 * the ":endif". That is, throw an interrupt exception if appropriate.
|
|
875 * Doing this here prevents an exception for a parsing error being
|
|
876 * discarded by throwing the interrupt exception later on.
|
|
877 */
|
|
878 if (!(eap->cstack->cs_flags[eap->cstack->cs_idx] & CSF_TRUE) &&
|
|
879 dbg_check_skipped(eap))
|
|
880 (void)do_intthrow(eap->cstack);
|
|
881
|
|
882 --eap->cstack->cs_idx;
|
|
883 }
|
|
884 }
|
|
885
|
|
886 /*
|
|
887 * ":else" and ":elseif".
|
|
888 */
|
|
889 void
|
|
890 ex_else(eap)
|
|
891 exarg_T *eap;
|
|
892 {
|
|
893 int error;
|
|
894 int skip;
|
|
895 int result;
|
|
896 struct condstack *cstack = eap->cstack;
|
|
897
|
|
898 /*
|
|
899 * Don't do something after an error, interrupt, or throw, or when there is
|
|
900 * a surrounding conditional and it was not active.
|
|
901 */
|
|
902 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
903 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
904
|
|
905 if (cstack->cs_idx < 0
|
75
|
906 || (cstack->cs_flags[cstack->cs_idx]
|
|
907 & (CSF_WHILE | CSF_FOR | CSF_TRY)))
|
7
|
908 {
|
|
909 if (eap->cmdidx == CMD_else)
|
|
910 {
|
|
911 eap->errmsg = (char_u *)N_("E581: :else without :if");
|
|
912 return;
|
|
913 }
|
|
914 eap->errmsg = (char_u *)N_("E582: :elseif without :if");
|
|
915 skip = TRUE;
|
|
916 }
|
|
917 else if (cstack->cs_flags[cstack->cs_idx] & CSF_ELSE)
|
|
918 {
|
|
919 if (eap->cmdidx == CMD_else)
|
|
920 {
|
|
921 eap->errmsg = (char_u *)N_("E583: multiple :else");
|
|
922 return;
|
|
923 }
|
|
924 eap->errmsg = (char_u *)N_("E584: :elseif after :else");
|
|
925 skip = TRUE;
|
|
926 }
|
|
927
|
|
928 /* if skipping or the ":if" was TRUE, reset ACTIVE, otherwise set it */
|
|
929 if (skip || cstack->cs_flags[cstack->cs_idx] & CSF_TRUE)
|
|
930 {
|
|
931 if (eap->errmsg == NULL)
|
|
932 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
|
|
933 skip = TRUE; /* don't evaluate an ":elseif" */
|
|
934 }
|
|
935 else
|
|
936 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE;
|
|
937
|
|
938 /*
|
|
939 * When debugging or a breakpoint was encountered, display the debug prompt
|
|
940 * (if not already done). This shows the user that an ":else" or ":elseif"
|
|
941 * is executed when the ":if" or previous ":elseif" was not TRUE. Handle
|
|
942 * a ">quit" debug command as if an interrupt had occurred before the
|
|
943 * ":else" or ":elseif". That is, set "skip" and throw an interrupt
|
|
944 * exception if appropriate. Doing this here prevents that an exception
|
|
945 * for a parsing errors is discarded when throwing the interrupt exception
|
|
946 * later on.
|
|
947 */
|
|
948 if (!skip && dbg_check_skipped(eap) && got_int)
|
|
949 {
|
|
950 (void)do_intthrow(cstack);
|
|
951 skip = TRUE;
|
|
952 }
|
|
953
|
|
954 if (eap->cmdidx == CMD_elseif)
|
|
955 {
|
|
956 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
|
|
957 /* When throwing error exceptions, we want to throw always the first
|
|
958 * of several errors in a row. This is what actually happens when
|
|
959 * a conditional error was detected above and there is another failure
|
|
960 * when parsing the expression. Since the skip flag is set in this
|
|
961 * case, the parsing error will be ignored by emsg(). */
|
|
962
|
|
963 if (!skip && !error)
|
|
964 {
|
|
965 if (result)
|
|
966 cstack->cs_flags[cstack->cs_idx] = CSF_ACTIVE | CSF_TRUE;
|
|
967 else
|
|
968 cstack->cs_flags[cstack->cs_idx] = 0;
|
|
969 }
|
|
970 else if (eap->errmsg == NULL)
|
|
971 /* set TRUE, so this conditional will never get active */
|
|
972 cstack->cs_flags[cstack->cs_idx] = CSF_TRUE;
|
|
973 }
|
|
974 else
|
|
975 cstack->cs_flags[cstack->cs_idx] |= CSF_ELSE;
|
|
976 }
|
|
977
|
|
978 /*
|
75
|
979 * Handle ":while" and ":for".
|
7
|
980 */
|
|
981 void
|
|
982 ex_while(eap)
|
|
983 exarg_T *eap;
|
|
984 {
|
|
985 int error;
|
|
986 int skip;
|
|
987 int result;
|
|
988 struct condstack *cstack = eap->cstack;
|
|
989
|
|
990 if (cstack->cs_idx == CSTACK_LEN - 1)
|
75
|
991 eap->errmsg = (char_u *)N_("E585: :while/:for nesting too deep");
|
7
|
992 else
|
|
993 {
|
|
994 /*
|
75
|
995 * The loop flag is set when we have jumped back from the matching
|
|
996 * ":endwhile" or ":endfor". When not set, need to initialise this
|
|
997 * cstack entry.
|
7
|
998 */
|
75
|
999 if ((cstack->cs_lflags & CSL_HAD_LOOP) == 0)
|
7
|
1000 {
|
|
1001 ++cstack->cs_idx;
|
75
|
1002 ++cstack->cs_looplevel;
|
7
|
1003 cstack->cs_line[cstack->cs_idx] = -1;
|
|
1004 }
|
75
|
1005 cstack->cs_flags[cstack->cs_idx] =
|
|
1006 eap->cmdidx == CMD_while ? CSF_WHILE : CSF_FOR;
|
7
|
1007
|
|
1008 /*
|
75
|
1009 * Don't do something after an error, interrupt, or throw, or when
|
|
1010 * there is a surrounding conditional and it was not active.
|
7
|
1011 */
|
|
1012 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
1013 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
75
|
1014 if (eap->cmdidx == CMD_while)
|
|
1015 {
|
|
1016 /*
|
|
1017 * ":while bool-expr"
|
|
1018 */
|
|
1019 result = eval_to_bool(eap->arg, &error, &eap->nextcmd, skip);
|
|
1020 }
|
|
1021 else
|
|
1022 {
|
|
1023 void *fi;
|
|
1024
|
|
1025 /*
|
|
1026 * ":for var in list-expr"
|
|
1027 */
|
|
1028 if ((cstack->cs_lflags & CSL_HAD_LOOP) != 0)
|
|
1029 {
|
|
1030 /* Jumping here from a ":continue" or ":endfor": use the
|
|
1031 * previously evaluated list. */
|
79
|
1032 fi = cstack->cs_forinfo[cstack->cs_idx];
|
75
|
1033 error = FALSE;
|
|
1034 }
|
|
1035 else
|
|
1036 {
|
|
1037 /* Evaluate the argument and get the info in a structure. */
|
|
1038 fi = eval_for_line(eap->arg, &error, &eap->nextcmd, skip);
|
79
|
1039 cstack->cs_forinfo[cstack->cs_idx] = fi;
|
75
|
1040 }
|
|
1041
|
|
1042 /* use the element at the start of the list and advance */
|
|
1043 if (!error && fi != NULL && !skip)
|
|
1044 result = next_for_item(fi, eap->arg);
|
|
1045 else
|
|
1046 result = FALSE;
|
|
1047
|
|
1048 if (!result)
|
|
1049 {
|
|
1050 free_for_info(fi);
|
79
|
1051 cstack->cs_forinfo[cstack->cs_idx] = NULL;
|
75
|
1052 }
|
|
1053 }
|
7
|
1054
|
|
1055 /*
|
75
|
1056 * If this cstack entry was just initialised and is active, set the
|
|
1057 * loop flag, so do_cmdline() will set the line number in cs_line[].
|
|
1058 * If executing the command a second time, clear the loop flag.
|
7
|
1059 */
|
|
1060 if (!skip && !error && result)
|
|
1061 {
|
75
|
1062 cstack->cs_flags[cstack->cs_idx] |= (CSF_ACTIVE | CSF_TRUE);
|
|
1063 cstack->cs_lflags ^= CSL_HAD_LOOP;
|
7
|
1064 }
|
|
1065 else
|
|
1066 {
|
75
|
1067 cstack->cs_lflags &= ~CSL_HAD_LOOP;
|
|
1068 /* If the ":while" evaluates to FALSE or ":for" is past the end of
|
|
1069 * the list, show the debug prompt at the ":endwhile"/":endfor" as
|
|
1070 * if there was a ":break" in a ":while"/":for" evaluating to
|
|
1071 * TRUE. */
|
7
|
1072 if (!skip && !error)
|
|
1073 cstack->cs_flags[cstack->cs_idx] |= CSF_TRUE;
|
|
1074 }
|
|
1075 }
|
|
1076 }
|
|
1077
|
|
1078 /*
|
|
1079 * ":continue"
|
|
1080 */
|
|
1081 void
|
|
1082 ex_continue(eap)
|
|
1083 exarg_T *eap;
|
|
1084 {
|
|
1085 int idx;
|
|
1086 struct condstack *cstack = eap->cstack;
|
|
1087
|
75
|
1088 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
|
|
1089 eap->errmsg = (char_u *)N_("E586: :continue without :while or :for");
|
7
|
1090 else
|
|
1091 {
|
|
1092 /* Try to find the matching ":while". This might stop at a try
|
|
1093 * conditional not in its finally clause (which is then to be executed
|
|
1094 * next). Therefor, inactivate all conditionals except the ":while"
|
|
1095 * itself (if reached). */
|
75
|
1096 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
|
|
1097 if ((cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
|
7
|
1098 {
|
79
|
1099 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
|
7
|
1100
|
|
1101 /*
|
75
|
1102 * Set CSL_HAD_CONT, so do_cmdline() will jump back to the
|
7
|
1103 * matching ":while".
|
|
1104 */
|
75
|
1105 cstack->cs_lflags |= CSL_HAD_CONT; /* let do_cmdline() handle it */
|
7
|
1106 }
|
|
1107 else
|
|
1108 {
|
|
1109 /* If a try conditional not in its finally clause is reached first,
|
|
1110 * make the ":continue" pending for execution at the ":endtry". */
|
|
1111 cstack->cs_pending[idx] = CSTP_CONTINUE;
|
|
1112 report_make_pending(CSTP_CONTINUE, NULL);
|
|
1113 }
|
|
1114 }
|
|
1115 }
|
|
1116
|
|
1117 /*
|
|
1118 * ":break"
|
|
1119 */
|
|
1120 void
|
|
1121 ex_break(eap)
|
|
1122 exarg_T *eap;
|
|
1123 {
|
|
1124 int idx;
|
|
1125 struct condstack *cstack = eap->cstack;
|
|
1126
|
75
|
1127 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
|
|
1128 eap->errmsg = (char_u *)N_("E587: :break without :while or :for");
|
7
|
1129 else
|
|
1130 {
|
|
1131 /* Inactivate conditionals until the matching ":while" or a try
|
|
1132 * conditional not in its finally clause (which is then to be
|
|
1133 * executed next) is found. In the latter case, make the ":break"
|
|
1134 * pending for execution at the ":endtry". */
|
75
|
1135 idx = cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, TRUE);
|
|
1136 if (!(cstack->cs_flags[idx] & (CSF_WHILE | CSF_FOR)))
|
7
|
1137 {
|
|
1138 cstack->cs_pending[idx] = CSTP_BREAK;
|
|
1139 report_make_pending(CSTP_BREAK, NULL);
|
|
1140 }
|
|
1141 }
|
|
1142 }
|
|
1143
|
|
1144 /*
|
75
|
1145 * ":endwhile" and ":endfor"
|
7
|
1146 */
|
|
1147 void
|
|
1148 ex_endwhile(eap)
|
|
1149 exarg_T *eap;
|
|
1150 {
|
|
1151 struct condstack *cstack = eap->cstack;
|
75
|
1152 int idx;
|
|
1153 char_u *err;
|
|
1154 int csf;
|
|
1155 int fl;
|
7
|
1156
|
75
|
1157 if (eap->cmdidx == CMD_endwhile)
|
|
1158 {
|
|
1159 err = e_while;
|
|
1160 csf = CSF_WHILE;
|
|
1161 }
|
|
1162 else
|
|
1163 {
|
|
1164 err = e_for;
|
|
1165 csf = CSF_FOR;
|
|
1166 }
|
|
1167
|
|
1168 if (cstack->cs_looplevel <= 0 || cstack->cs_idx < 0)
|
|
1169 eap->errmsg = err;
|
7
|
1170 else
|
|
1171 {
|
75
|
1172 fl = cstack->cs_flags[cstack->cs_idx];
|
|
1173 if (!(fl & csf))
|
7
|
1174 {
|
75
|
1175 if (fl & CSF_WHILE)
|
|
1176 eap->errmsg = (char_u *)_("E999: Using :endfor with :while");
|
|
1177 else if (fl & CSF_FOR)
|
|
1178 eap->errmsg = (char_u *)_("E999: Using :endwhile with :for");
|
|
1179 else if (!(fl & CSF_TRY))
|
|
1180 eap->errmsg = e_endif;
|
|
1181 else if (fl & CSF_FINALLY)
|
|
1182 eap->errmsg = e_endtry;
|
7
|
1183 /* Try to find the matching ":while" and report what's missing. */
|
|
1184 for (idx = cstack->cs_idx; idx > 0; --idx)
|
|
1185 {
|
75
|
1186 fl = cstack->cs_flags[idx];
|
|
1187 if ((fl & CSF_TRY) && !(fl & CSF_FINALLY))
|
7
|
1188 {
|
|
1189 /* Give up at a try conditional not in its finally clause.
|
75
|
1190 * Ignore the ":endwhile"/":endfor". */
|
|
1191 eap->errmsg = err;
|
7
|
1192 return;
|
|
1193 }
|
75
|
1194 if (fl & csf)
|
7
|
1195 break;
|
|
1196 }
|
|
1197 /* Cleanup and rewind all contained (and unclosed) conditionals. */
|
75
|
1198 (void)cleanup_conditionals(cstack, CSF_WHILE | CSF_FOR, FALSE);
|
7
|
1199 rewind_conditionals(cstack, idx, CSF_TRY, &cstack->cs_trylevel);
|
|
1200 }
|
|
1201
|
|
1202 /*
|
|
1203 * When debugging or a breakpoint was encountered, display the debug
|
|
1204 * prompt (if not already done). This shows the user that an
|
75
|
1205 * ":endwhile"/":endfor" is executed when the ":while" was not TRUE or
|
|
1206 * after a ":break". Handle a ">quit" debug command as if an
|
|
1207 * interrupt had occurred before the ":endwhile"/":endfor". That is,
|
|
1208 * throw an interrupt exception if appropriate. Doing this here
|
|
1209 * prevents that an exception for a parsing error is discarded when
|
|
1210 * throwing the interrupt exception later on.
|
7
|
1211 */
|
|
1212 else if (cstack->cs_flags[cstack->cs_idx] & CSF_TRUE
|
|
1213 && !(cstack->cs_flags[cstack->cs_idx] & CSF_ACTIVE)
|
|
1214 && dbg_check_skipped(eap))
|
|
1215 (void)do_intthrow(cstack);
|
|
1216
|
|
1217 /*
|
75
|
1218 * Set loop flag, so do_cmdline() will jump back to the matching
|
|
1219 * ":while" or ":for".
|
7
|
1220 */
|
75
|
1221 cstack->cs_lflags |= CSL_HAD_ENDLOOP;
|
7
|
1222 }
|
|
1223 }
|
|
1224
|
|
1225
|
|
1226 /*
|
|
1227 * ":throw expr"
|
|
1228 */
|
|
1229 void
|
|
1230 ex_throw(eap)
|
|
1231 exarg_T *eap;
|
|
1232 {
|
|
1233 char_u *arg = eap->arg;
|
|
1234 char_u *value;
|
|
1235
|
|
1236 if (*arg != NUL && *arg != '|' && *arg != '\n')
|
|
1237 value = eval_to_string_skip(arg, &eap->nextcmd, eap->skip);
|
|
1238 else
|
|
1239 {
|
|
1240 EMSG(_(e_argreq));
|
|
1241 value = NULL;
|
|
1242 }
|
|
1243
|
|
1244 /* On error or when an exception is thrown during argument evaluation, do
|
|
1245 * not throw. */
|
|
1246 if (!eap->skip && value != NULL)
|
|
1247 {
|
|
1248 if (throw_exception(value, ET_USER, NULL) == FAIL)
|
|
1249 vim_free(value);
|
|
1250 else
|
|
1251 do_throw(eap->cstack);
|
|
1252 }
|
|
1253 }
|
|
1254
|
|
1255 /*
|
21
|
1256 * Throw the current exception through the specified cstack. Common routine
|
|
1257 * for ":throw" (user exception) and error and interrupt exceptions. Also
|
|
1258 * used for rethrowing an uncaught exception.
|
7
|
1259 */
|
|
1260 void
|
|
1261 do_throw(cstack)
|
|
1262 struct condstack *cstack;
|
|
1263 {
|
|
1264 int idx;
|
|
1265 int inactivate_try = FALSE;
|
|
1266
|
|
1267 /*
|
|
1268 * Cleanup and inactivate up to the next surrounding try conditional that
|
|
1269 * is not in its finally clause. Normally, do not inactivate the try
|
|
1270 * conditional itself, so that its ACTIVE flag can be tested below. But
|
|
1271 * if a previous error or interrupt has not been converted to an exception,
|
|
1272 * inactivate the try conditional, too, as if the conversion had been done,
|
21
|
1273 * and reset the did_emsg or got_int flag, so this won't happen again at
|
|
1274 * the next surrounding try conditional.
|
7
|
1275 */
|
|
1276 if (did_emsg && !THROW_ON_ERROR)
|
|
1277 {
|
|
1278 inactivate_try = TRUE;
|
|
1279 did_emsg = FALSE;
|
|
1280 }
|
|
1281 if (got_int && !THROW_ON_INTERRUPT)
|
|
1282 {
|
|
1283 inactivate_try = TRUE;
|
|
1284 got_int = FALSE;
|
|
1285 }
|
|
1286 idx = cleanup_conditionals(cstack, 0, inactivate_try);
|
|
1287 if (idx >= 0)
|
|
1288 {
|
|
1289 /*
|
|
1290 * If this try conditional is active and we are before its first
|
21
|
1291 * ":catch", set THROWN so that the ":catch" commands will check
|
|
1292 * whether the exception matches. When the exception came from any of
|
|
1293 * the catch clauses, it will be made pending at the ":finally" (if
|
|
1294 * present) and rethrown at the ":endtry". This will also happen if
|
|
1295 * the try conditional is inactive. This is the case when we are
|
|
1296 * throwing an exception due to an error or interrupt on the way from
|
|
1297 * a preceding ":continue", ":break", ":return", ":finish", error or
|
|
1298 * interrupt (not converted to an exception) to the finally clause or
|
|
1299 * from a preceding throw of a user or error or interrupt exception to
|
|
1300 * the matching catch clause or the finally clause.
|
7
|
1301 */
|
|
1302 if (!(cstack->cs_flags[idx] & CSF_CAUGHT))
|
|
1303 {
|
|
1304 if (cstack->cs_flags[idx] & CSF_ACTIVE)
|
|
1305 cstack->cs_flags[idx] |= CSF_THROWN;
|
|
1306 else
|
|
1307 /* THROWN may have already been set for a catchable exception
|
|
1308 * that has been discarded. Ensure it is reset for the new
|
|
1309 * exception. */
|
|
1310 cstack->cs_flags[idx] &= ~CSF_THROWN;
|
|
1311 }
|
|
1312 cstack->cs_flags[idx] &= ~CSF_ACTIVE;
|
|
1313 cstack->cs_exception[idx] = current_exception;
|
|
1314 }
|
|
1315 #if 0
|
21
|
1316 /* TODO: Add optimization below. Not yet done because of interface
|
|
1317 * problems to eval.c and ex_cmds2.c. (Servatius) */
|
7
|
1318 else
|
|
1319 {
|
|
1320 /*
|
|
1321 * There are no catch clauses to check or finally clauses to execute.
|
|
1322 * End the current script or function. The exception will be rethrown
|
|
1323 * in the caller.
|
|
1324 */
|
|
1325 if (getline_equal(eap->getline, eap->cookie, get_func_line))
|
|
1326 current_funccal->returned = TRUE;
|
|
1327 elseif (eap->get_func_line == getsourceline)
|
|
1328 ((struct source_cookie *)eap->cookie)->finished = TRUE;
|
|
1329 }
|
|
1330 #endif
|
|
1331
|
|
1332 did_throw = TRUE;
|
|
1333 }
|
|
1334
|
|
1335 /*
|
|
1336 * ":try"
|
|
1337 */
|
|
1338 void
|
|
1339 ex_try(eap)
|
|
1340 exarg_T *eap;
|
|
1341 {
|
|
1342 int skip;
|
|
1343 struct condstack *cstack = eap->cstack;
|
|
1344
|
|
1345 if (cstack->cs_idx == CSTACK_LEN - 1)
|
|
1346 eap->errmsg = (char_u *)N_("E601: :try nesting too deep");
|
|
1347 else
|
|
1348 {
|
|
1349 ++cstack->cs_idx;
|
|
1350 ++cstack->cs_trylevel;
|
|
1351 cstack->cs_flags[cstack->cs_idx] = CSF_TRY;
|
|
1352 cstack->cs_pending[cstack->cs_idx] = CSTP_NONE;
|
|
1353
|
|
1354 /*
|
|
1355 * Don't do something after an error, interrupt, or throw, or when there
|
|
1356 * is a surrounding conditional and it was not active.
|
|
1357 */
|
|
1358 skip = did_emsg || got_int || did_throw || (cstack->cs_idx > 0
|
|
1359 && !(cstack->cs_flags[cstack->cs_idx - 1] & CSF_ACTIVE));
|
|
1360
|
|
1361 if (!skip)
|
|
1362 {
|
|
1363 /* Set ACTIVE and TRUE. TRUE means that the corresponding ":catch"
|
|
1364 * commands should check for a match if an exception is thrown and
|
|
1365 * that the finally clause needs to be executed. */
|
|
1366 cstack->cs_flags[cstack->cs_idx] |= CSF_ACTIVE | CSF_TRUE;
|
|
1367
|
|
1368 /*
|
|
1369 * ":silent!", even when used in a try conditional, disables
|
|
1370 * displaying of error messages and conversion of errors to
|
|
1371 * exceptions. When the silent commands again open a try
|
|
1372 * conditional, save "emsg_silent" and reset it so that errors are
|
|
1373 * again converted to exceptions. The value is restored when that
|
|
1374 * try conditional is left. If it is left normally, the commands
|
|
1375 * following the ":endtry" are again silent. If it is left by
|
|
1376 * a ":continue", ":break", ":return", or ":finish", the commands
|
|
1377 * executed next are again silent. If it is left due to an
|
|
1378 * aborting error, an interrupt, or an exception, restoring
|
|
1379 * "emsg_silent" does not matter since we are already in the
|
|
1380 * aborting state and/or the exception has already been thrown.
|
|
1381 * The effect is then just freeing the memory that was allocated
|
|
1382 * to save the value.
|
|
1383 */
|
|
1384 if (emsg_silent)
|
|
1385 {
|
|
1386 eslist_T *elem;
|
|
1387
|
|
1388 elem = (eslist_T *)alloc((unsigned)sizeof(struct eslist_elem));
|
|
1389 if (elem == NULL)
|
|
1390 EMSG(_(e_outofmem));
|
|
1391 else
|
|
1392 {
|
|
1393 elem->saved_emsg_silent = emsg_silent;
|
|
1394 elem->next = cstack->cs_emsg_silent_list;
|
|
1395 cstack->cs_emsg_silent_list = elem;
|
|
1396 cstack->cs_flags[cstack->cs_idx] |= CSF_SILENT;
|
|
1397 emsg_silent = 0;
|
|
1398 }
|
|
1399 }
|
|
1400 }
|
|
1401
|
|
1402 }
|
|
1403 }
|
|
1404
|
|
1405 /*
|
|
1406 * ":catch /{pattern}/" and ":catch"
|
|
1407 */
|
|
1408 void
|
|
1409 ex_catch(eap)
|
|
1410 exarg_T *eap;
|
|
1411 {
|
|
1412 int idx = 0;
|
|
1413 int give_up = FALSE;
|
|
1414 int skip = FALSE;
|
|
1415 int caught = FALSE;
|
|
1416 char_u *end;
|
|
1417 int save_char = 0;
|
|
1418 char_u *save_cpo;
|
|
1419 regmatch_T regmatch;
|
|
1420 int prev_got_int;
|
|
1421 struct condstack *cstack = eap->cstack;
|
|
1422 char_u *pat;
|
|
1423
|
|
1424 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
|
|
1425 {
|
|
1426 eap->errmsg = (char_u *)N_("E603: :catch without :try");
|
|
1427 give_up = TRUE;
|
|
1428 }
|
|
1429 else
|
|
1430 {
|
|
1431 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
|
|
1432 {
|
|
1433 /* Report what's missing if the matching ":try" is not in its
|
|
1434 * finally clause. */
|
75
|
1435 eap->errmsg = get_end_emsg(cstack);
|
7
|
1436 skip = TRUE;
|
|
1437 }
|
|
1438 for (idx = cstack->cs_idx; idx > 0; --idx)
|
|
1439 if (cstack->cs_flags[idx] & CSF_TRY)
|
|
1440 break;
|
|
1441 if (cstack->cs_flags[idx] & CSF_FINALLY)
|
|
1442 {
|
|
1443 /* Give up for a ":catch" after ":finally" and ignore it.
|
|
1444 * Just parse. */
|
|
1445 eap->errmsg = (char_u *)N_("E604: :catch after :finally");
|
|
1446 give_up = TRUE;
|
|
1447 }
|
79
|
1448 else
|
75
|
1449 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
|
|
1450 &cstack->cs_looplevel);
|
7
|
1451 }
|
|
1452
|
|
1453 if (ends_excmd(*eap->arg)) /* no argument, catch all errors */
|
|
1454 {
|
|
1455 pat = (char_u *)".*";
|
|
1456 end = NULL;
|
|
1457 eap->nextcmd = find_nextcmd(eap->arg);
|
|
1458 }
|
|
1459 else
|
|
1460 {
|
|
1461 pat = eap->arg + 1;
|
|
1462 end = skip_regexp(pat, *eap->arg, TRUE, NULL);
|
|
1463 }
|
|
1464
|
|
1465 if (!give_up)
|
|
1466 {
|
|
1467 /*
|
|
1468 * Don't do something when no exception has been thrown or when the
|
|
1469 * corresponding try block never got active (because of an inactive
|
|
1470 * surrounding conditional or after an error or interrupt or throw).
|
|
1471 */
|
|
1472 if (!did_throw || !(cstack->cs_flags[idx] & CSF_TRUE))
|
|
1473 skip = TRUE;
|
|
1474
|
|
1475 /*
|
|
1476 * Check for a match only if an exception is thrown but not caught by
|
|
1477 * a previous ":catch". An exception that has replaced a discarded
|
|
1478 * exception is not checked (THROWN is not set then).
|
|
1479 */
|
|
1480 if (!skip && (cstack->cs_flags[idx] & CSF_THROWN)
|
|
1481 && !(cstack->cs_flags[idx] & CSF_CAUGHT))
|
|
1482 {
|
|
1483 if (end != NULL && *end != NUL && !ends_excmd(*skipwhite(end + 1)))
|
|
1484 {
|
|
1485 EMSG(_(e_trailing));
|
|
1486 return;
|
|
1487 }
|
|
1488
|
|
1489 /* When debugging or a breakpoint was encountered, display the
|
|
1490 * debug prompt (if not already done) before checking for a match.
|
|
1491 * This is a helpful hint for the user when the regular expression
|
|
1492 * matching fails. Handle a ">quit" debug command as if an
|
|
1493 * interrupt had occurred before the ":catch". That is, discard
|
|
1494 * the original exception, replace it by an interrupt exception,
|
|
1495 * and don't catch it in this try block. */
|
|
1496 if (!dbg_check_skipped(eap) || !do_intthrow(cstack))
|
|
1497 {
|
|
1498 /* Terminate the pattern and avoid the 'l' flag in 'cpoptions'
|
|
1499 * while compiling it. */
|
|
1500 if (end != NULL)
|
|
1501 {
|
|
1502 save_char = *end;
|
|
1503 *end = NUL;
|
|
1504 }
|
|
1505 save_cpo = p_cpo;
|
|
1506 p_cpo = (char_u *)"";
|
|
1507 regmatch.regprog = vim_regcomp(pat, TRUE);
|
|
1508 regmatch.rm_ic = FALSE;
|
|
1509 if (end != NULL)
|
|
1510 *end = save_char;
|
|
1511 p_cpo = save_cpo;
|
|
1512 if (regmatch.regprog == NULL)
|
|
1513 EMSG2(_(e_invarg2), pat);
|
|
1514 else
|
|
1515 {
|
|
1516 /*
|
|
1517 * Save the value of got_int and reset it. We don't want
|
|
1518 * a previous interruption cancel matching, only hitting
|
|
1519 * CTRL-C while matching should abort it.
|
|
1520 */
|
|
1521 prev_got_int = got_int;
|
|
1522 got_int = FALSE;
|
|
1523 caught = vim_regexec_nl(®match, current_exception->value,
|
|
1524 (colnr_T)0);
|
|
1525 got_int |= prev_got_int;
|
|
1526 vim_free(regmatch.regprog);
|
|
1527 }
|
|
1528 }
|
|
1529 }
|
|
1530
|
|
1531 if (caught)
|
|
1532 {
|
|
1533 /* Make this ":catch" clause active and reset did_emsg, got_int,
|
|
1534 * and did_throw. Put the exception on the caught stack. */
|
|
1535 cstack->cs_flags[idx] |= CSF_ACTIVE | CSF_CAUGHT;
|
|
1536 did_emsg = got_int = did_throw = FALSE;
|
|
1537 catch_exception((except_T *)cstack->cs_exception[idx]);
|
|
1538 /* It's mandatory that the current exception is stored in the cstack
|
|
1539 * so that it can be discarded at the next ":catch", ":finally", or
|
|
1540 * ":endtry" or when the catch clause is left by a ":continue",
|
|
1541 * ":break", ":return", ":finish", error, interrupt, or another
|
|
1542 * exception. */
|
|
1543 if (cstack->cs_exception[cstack->cs_idx] != current_exception)
|
|
1544 EMSG(_(e_internal));
|
|
1545 }
|
|
1546 else
|
|
1547 {
|
|
1548 /*
|
|
1549 * If there is a preceding catch clause and it caught the exception,
|
|
1550 * finish the exception now. This happens also after errors except
|
|
1551 * when this ":catch" was after the ":finally" or not within
|
|
1552 * a ":try". Make the try conditional inactive so that the
|
|
1553 * following catch clauses are skipped. On an error or interrupt
|
|
1554 * after the preceding try block or catch clause was left by
|
|
1555 * a ":continue", ":break", ":return", or ":finish", discard the
|
|
1556 * pending action.
|
|
1557 */
|
|
1558 cleanup_conditionals(cstack, CSF_TRY, TRUE);
|
|
1559 }
|
|
1560 }
|
|
1561
|
|
1562 if (end != NULL)
|
|
1563 eap->nextcmd = find_nextcmd(end);
|
|
1564 }
|
|
1565
|
|
1566 /*
|
|
1567 * ":finally"
|
|
1568 */
|
|
1569 void
|
|
1570 ex_finally(eap)
|
|
1571 exarg_T *eap;
|
|
1572 {
|
|
1573 int idx;
|
|
1574 int skip = FALSE;
|
|
1575 int pending = CSTP_NONE;
|
|
1576 struct condstack *cstack = eap->cstack;
|
|
1577
|
|
1578 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
|
|
1579 eap->errmsg = (char_u *)N_("E606: :finally without :try");
|
|
1580 else
|
|
1581 {
|
|
1582 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
|
|
1583 {
|
75
|
1584 eap->errmsg = get_end_emsg(cstack);
|
7
|
1585 for (idx = cstack->cs_idx - 1; idx > 0; --idx)
|
|
1586 if (cstack->cs_flags[idx] & CSF_TRY)
|
|
1587 break;
|
|
1588 /* Make this error pending, so that the commands in the following
|
|
1589 * finally clause can be executed. This overrules also a pending
|
|
1590 * ":continue", ":break", ":return", or ":finish". */
|
|
1591 pending = CSTP_ERROR;
|
|
1592 }
|
|
1593 else
|
|
1594 idx = cstack->cs_idx;
|
|
1595
|
|
1596 if (cstack->cs_flags[idx] & CSF_FINALLY)
|
|
1597 {
|
|
1598 /* Give up for a multiple ":finally" and ignore it. */
|
|
1599 eap->errmsg = (char_u *)N_("E607: multiple :finally");
|
|
1600 return;
|
|
1601 }
|
79
|
1602 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
|
75
|
1603 &cstack->cs_looplevel);
|
7
|
1604
|
|
1605 /*
|
|
1606 * Don't do something when the corresponding try block never got active
|
|
1607 * (because of an inactive surrounding conditional or after an error or
|
|
1608 * interrupt or throw) or for a ":finally" without ":try" or a multiple
|
|
1609 * ":finally". After every other error (did_emsg or the conditional
|
|
1610 * errors detected above) or after an interrupt (got_int) or an
|
|
1611 * exception (did_throw), the finally clause must be executed.
|
|
1612 */
|
|
1613 skip = !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
|
|
1614
|
|
1615 if (!skip)
|
|
1616 {
|
|
1617 /* When debugging or a breakpoint was encountered, display the
|
|
1618 * debug prompt (if not already done). The user then knows that the
|
|
1619 * finally clause is executed. */
|
|
1620 if (dbg_check_skipped(eap))
|
|
1621 {
|
|
1622 /* Handle a ">quit" debug command as if an interrupt had
|
|
1623 * occurred before the ":finally". That is, discard the
|
|
1624 * original exception and replace it by an interrupt
|
|
1625 * exception. */
|
|
1626 (void)do_intthrow(cstack);
|
|
1627 }
|
|
1628
|
|
1629 /*
|
|
1630 * If there is a preceding catch clause and it caught the exception,
|
|
1631 * finish the exception now. This happens also after errors except
|
|
1632 * when this is a multiple ":finally" or one not within a ":try".
|
|
1633 * After an error or interrupt, this also discards a pending
|
|
1634 * ":continue", ":break", ":finish", or ":return" from the preceding
|
|
1635 * try block or catch clause.
|
|
1636 */
|
|
1637 cleanup_conditionals(cstack, CSF_TRY, FALSE);
|
|
1638
|
|
1639 /*
|
|
1640 * Make did_emsg, got_int, did_throw pending. If set, they overrule
|
|
1641 * a pending ":continue", ":break", ":return", or ":finish". Then
|
|
1642 * we have particularly to discard a pending return value (as done
|
|
1643 * by the call to cleanup_conditionals() above when did_emsg or
|
|
1644 * got_int is set). The pending values are restored by the
|
|
1645 * ":endtry", except if there is a new error, interrupt, exception,
|
|
1646 * ":continue", ":break", ":return", or ":finish" in the following
|
75
|
1647 * finally clause. A missing ":endwhile", ":endfor" or ":endif"
|
|
1648 * detected here is treated as if did_emsg and did_throw had
|
|
1649 * already been set, respectively in case that the error is not
|
|
1650 * converted to an exception, did_throw had already been unset.
|
|
1651 * We must not set did_emsg here since that would suppress the
|
|
1652 * error message.
|
7
|
1653 */
|
|
1654 if (pending == CSTP_ERROR || did_emsg || got_int || did_throw)
|
|
1655 {
|
|
1656 if (cstack->cs_pending[cstack->cs_idx] == CSTP_RETURN)
|
|
1657 {
|
|
1658 report_discard_pending(CSTP_RETURN,
|
68
|
1659 cstack->cs_rettv[cstack->cs_idx]);
|
|
1660 discard_pending_return(cstack->cs_rettv[cstack->cs_idx]);
|
7
|
1661 }
|
|
1662 if (pending == CSTP_ERROR && !did_emsg)
|
|
1663 pending |= (THROW_ON_ERROR) ? CSTP_THROW : 0;
|
|
1664 else
|
|
1665 pending |= did_throw ? CSTP_THROW : 0;
|
|
1666 pending |= did_emsg ? CSTP_ERROR : 0;
|
|
1667 pending |= got_int ? CSTP_INTERRUPT : 0;
|
|
1668 cstack->cs_pending[cstack->cs_idx] = pending;
|
|
1669
|
|
1670 /* It's mandatory that the current exception is stored in the
|
|
1671 * cstack so that it can be rethrown at the ":endtry" or be
|
|
1672 * discarded if the finally clause is left by a ":continue",
|
|
1673 * ":break", ":return", ":finish", error, interrupt, or another
|
|
1674 * exception. When emsg() is called for a missing ":endif" or
|
75
|
1675 * a missing ":endwhile"/":endfor" detected here, the
|
|
1676 * exception will be discarded. */
|
79
|
1677 if (did_throw && cstack->cs_exception[cstack->cs_idx]
|
|
1678 != current_exception)
|
7
|
1679 EMSG(_(e_internal));
|
|
1680 }
|
|
1681
|
|
1682 /*
|
75
|
1683 * Set CSL_HAD_FINA, so do_cmdline() will reset did_emsg,
|
22
|
1684 * got_int, and did_throw and make the finally clause active.
|
|
1685 * This will happen after emsg() has been called for a missing
|
75
|
1686 * ":endif" or a missing ":endwhile"/":endfor" detected here, so
|
|
1687 * that the following finally clause will be executed even then.
|
7
|
1688 */
|
75
|
1689 cstack->cs_lflags |= CSL_HAD_FINA;
|
7
|
1690 }
|
|
1691 }
|
|
1692 }
|
|
1693
|
|
1694 /*
|
|
1695 * ":endtry"
|
|
1696 */
|
|
1697 void
|
|
1698 ex_endtry(eap)
|
|
1699 exarg_T *eap;
|
|
1700 {
|
|
1701 int idx;
|
|
1702 int skip;
|
|
1703 int rethrow = FALSE;
|
|
1704 int pending = CSTP_NONE;
|
68
|
1705 void *rettv = NULL;
|
7
|
1706 struct condstack *cstack = eap->cstack;
|
|
1707
|
|
1708 if (cstack->cs_trylevel <= 0 || cstack->cs_idx < 0)
|
|
1709 eap->errmsg = (char_u *)N_("E602: :endtry without :try");
|
|
1710 else
|
|
1711 {
|
|
1712 /*
|
|
1713 * Don't do something after an error, interrupt or throw in the try
|
|
1714 * block, catch clause, or finally clause preceding this ":endtry" or
|
|
1715 * when an error or interrupt occurred after a ":continue", ":break",
|
|
1716 * ":return", or ":finish" in a try block or catch clause preceding this
|
|
1717 * ":endtry" or when the try block never got active (because of an
|
|
1718 * inactive surrounding conditional or after an error or interrupt or
|
|
1719 * throw) or when there is a surrounding conditional and it has been
|
|
1720 * made inactive by a ":continue", ":break", ":return", or ":finish" in
|
|
1721 * the finally clause. The latter case need not be tested since then
|
|
1722 * anything pending has already been discarded. */
|
|
1723 skip = did_emsg || got_int || did_throw ||
|
|
1724 !(cstack->cs_flags[cstack->cs_idx] & CSF_TRUE);
|
|
1725
|
|
1726 if (!(cstack->cs_flags[cstack->cs_idx] & CSF_TRY))
|
|
1727 {
|
75
|
1728 eap->errmsg = get_end_emsg(cstack);
|
7
|
1729 /* Find the matching ":try" and report what's missing. */
|
|
1730 idx = cstack->cs_idx;
|
|
1731 do
|
|
1732 --idx;
|
|
1733 while (idx > 0 && !(cstack->cs_flags[idx] & CSF_TRY));
|
75
|
1734 rewind_conditionals(cstack, idx, CSF_WHILE | CSF_FOR,
|
|
1735 &cstack->cs_looplevel);
|
7
|
1736 skip = TRUE;
|
|
1737
|
|
1738 /*
|
|
1739 * If an exception is being thrown, discard it to prevent it from
|
|
1740 * being rethrown at the end of this function. It would be
|
|
1741 * discarded by the error message, anyway. Resets did_throw.
|
|
1742 * This does not affect the script termination due to the error
|
|
1743 * since "trylevel" is decremented after emsg() has been called.
|
|
1744 */
|
|
1745 if (did_throw)
|
|
1746 discard_current_exception();
|
|
1747 }
|
|
1748 else
|
|
1749 {
|
|
1750 idx = cstack->cs_idx;
|
|
1751
|
|
1752 /*
|
|
1753 * If we stopped with the exception currently being thrown at this
|
|
1754 * try conditional since we didn't know that it doesn't have
|
|
1755 * a finally clause, we need to rethrow it after closing the try
|
|
1756 * conditional.
|
|
1757 */
|
|
1758 if (did_throw && (cstack->cs_flags[idx] & CSF_TRUE)
|
|
1759 && !(cstack->cs_flags[idx] & CSF_FINALLY))
|
|
1760 rethrow = TRUE;
|
|
1761 }
|
|
1762
|
|
1763 /* If there was no finally clause, show the user when debugging or
|
|
1764 * a breakpoint was encountered that the end of the try conditional has
|
|
1765 * been reached: display the debug prompt (if not already done). Do
|
|
1766 * this on normal control flow or when an exception was thrown, but not
|
|
1767 * on an interrupt or error not converted to an exception or when
|
|
1768 * a ":break", ":continue", ":return", or ":finish" is pending. These
|
|
1769 * actions are carried out immediately.
|
|
1770 */
|
|
1771 if ((rethrow || (!skip
|
|
1772 && !(cstack->cs_flags[idx] & CSF_FINALLY)
|
|
1773 && !cstack->cs_pending[idx]))
|
|
1774 && dbg_check_skipped(eap))
|
|
1775 {
|
|
1776 /* Handle a ">quit" debug command as if an interrupt had occurred
|
|
1777 * before the ":endtry". That is, throw an interrupt exception and
|
|
1778 * set "skip" and "rethrow". */
|
|
1779 if (got_int)
|
|
1780 {
|
|
1781 skip = TRUE;
|
|
1782 (void)do_intthrow(cstack);
|
|
1783 /* The do_intthrow() call may have reset did_throw or
|
|
1784 * cstack->cs_pending[idx].*/
|
|
1785 rethrow = FALSE;
|
|
1786 if (did_throw && !(cstack->cs_flags[idx] & CSF_FINALLY))
|
|
1787 rethrow = TRUE;
|
|
1788 }
|
|
1789 }
|
|
1790
|
|
1791 /*
|
|
1792 * If a ":return" is pending, we need to resume it after closing the
|
|
1793 * try conditional; remember the return value. If there was a finally
|
|
1794 * clause making an exception pending, we need to rethrow it. Make it
|
|
1795 * the exception currently being thrown.
|
|
1796 */
|
|
1797 if (!skip)
|
|
1798 {
|
|
1799 pending = cstack->cs_pending[idx];
|
|
1800 cstack->cs_pending[idx] = CSTP_NONE;
|
|
1801 if (pending == CSTP_RETURN)
|
68
|
1802 rettv = cstack->cs_rettv[idx];
|
7
|
1803 else if (pending & CSTP_THROW)
|
|
1804 current_exception = cstack->cs_exception[idx];
|
|
1805 }
|
|
1806
|
|
1807 /*
|
|
1808 * Discard anything pending on an error, interrupt, or throw in the
|
|
1809 * finally clause. If there was no ":finally", discard a pending
|
|
1810 * ":continue", ":break", ":return", or ":finish" if an error or
|
|
1811 * interrupt occurred afterwards, but before the ":endtry" was reached.
|
|
1812 * If an exception was caught by the last of the catch clauses and there
|
|
1813 * was no finally clause, finish the exception now. This happens also
|
|
1814 * after errors except when this ":endtry" is not within a ":try".
|
|
1815 * Restore "emsg_silent" if it has been reset by this try conditional.
|
|
1816 */
|
|
1817 cleanup_conditionals(cstack, CSF_TRY | CSF_SILENT, TRUE);
|
|
1818
|
|
1819 --cstack->cs_idx;
|
|
1820 --cstack->cs_trylevel;
|
|
1821
|
|
1822 if (!skip)
|
|
1823 {
|
|
1824 report_resume_pending(pending,
|
68
|
1825 (pending == CSTP_RETURN) ? rettv :
|
7
|
1826 (pending & CSTP_THROW) ? (void *)current_exception : NULL);
|
|
1827 switch (pending)
|
|
1828 {
|
|
1829 case CSTP_NONE:
|
|
1830 break;
|
|
1831
|
|
1832 /* Reactivate a pending ":continue", ":break", ":return",
|
|
1833 * ":finish" from the try block or a catch clause of this try
|
|
1834 * conditional. This is skipped, if there was an error in an
|
|
1835 * (unskipped) conditional command or an interrupt afterwards
|
|
1836 * or if the finally clause is present and executed a new error,
|
|
1837 * interrupt, throw, ":continue", ":break", ":return", or
|
|
1838 * ":finish". */
|
|
1839 case CSTP_CONTINUE:
|
|
1840 ex_continue(eap);
|
|
1841 break;
|
|
1842 case CSTP_BREAK:
|
|
1843 ex_break(eap);
|
|
1844 break;
|
|
1845 case CSTP_RETURN:
|
68
|
1846 do_return(eap, FALSE, FALSE, rettv);
|
7
|
1847 break;
|
|
1848 case CSTP_FINISH:
|
|
1849 do_finish(eap, FALSE);
|
|
1850 break;
|
|
1851
|
|
1852 /* When the finally clause was entered due to an error,
|
|
1853 * interrupt or throw (as opposed to a ":continue", ":break",
|
|
1854 * ":return", or ":finish"), restore the pending values of
|
|
1855 * did_emsg, got_int, and did_throw. This is skipped, if there
|
|
1856 * was a new error, interrupt, throw, ":continue", ":break",
|
|
1857 * ":return", or ":finish". in the finally clause. */
|
|
1858 default:
|
|
1859 if (pending & CSTP_ERROR)
|
|
1860 did_emsg = TRUE;
|
|
1861 if (pending & CSTP_INTERRUPT)
|
|
1862 got_int = TRUE;
|
|
1863 if (pending & CSTP_THROW)
|
|
1864 rethrow = TRUE;
|
|
1865 break;
|
|
1866 }
|
|
1867 }
|
|
1868
|
|
1869 if (rethrow)
|
|
1870 /* Rethrow the current exception (within this cstack). */
|
|
1871 do_throw(cstack);
|
|
1872 }
|
|
1873 }
|
|
1874
|
|
1875 /*
|
36
|
1876 * enter_cleanup() and leave_cleanup()
|
|
1877 *
|
|
1878 * Functions to be called before/after invoking a sequence of autocommands for
|
|
1879 * cleanup for a failed command. (Failure means here that a call to emsg()
|
|
1880 * has been made, an interrupt occurred, or there is an uncaught exception
|
|
1881 * from a previous autocommand execution of the same command.)
|
24
|
1882 *
|
36
|
1883 * Call enter_cleanup() with a pointer to a cleanup_T and pass the same
|
|
1884 * pointer to leave_cleanup(). The cleanup_T structure stores the pending
|
|
1885 * error/interrupt/exception state.
|
|
1886 */
|
|
1887
|
|
1888 /*
|
|
1889 * This function works a bit like ex_finally() except that there was not
|
|
1890 * actually an extra try block around the part that failed and an error or
|
|
1891 * interrupt has not (yet) been converted to an exception. This function
|
|
1892 * saves the error/interrupt/ exception state and prepares for the call to
|
|
1893 * do_cmdline() that is going to be made for the cleanup autocommand
|
|
1894 * execution.
|
24
|
1895 */
|
|
1896 void
|
|
1897 enter_cleanup(csp)
|
|
1898 cleanup_T *csp;
|
|
1899 {
|
|
1900 int pending = CSTP_NONE;
|
|
1901
|
|
1902 /*
|
|
1903 * Postpone did_emsg, got_int, did_throw. The pending values will be
|
|
1904 * restored by leave_cleanup() except if there was an aborting error,
|
|
1905 * interrupt, or uncaught exception after this function ends.
|
|
1906 */
|
|
1907 if (did_emsg || got_int || did_throw || need_rethrow)
|
|
1908 {
|
|
1909 csp->pending = (did_emsg ? CSTP_ERROR : 0)
|
|
1910 | (got_int ? CSTP_INTERRUPT : 0)
|
|
1911 | (did_throw ? CSTP_THROW : 0)
|
|
1912 | (need_rethrow ? CSTP_THROW : 0);
|
|
1913
|
|
1914 /* If we are currently throwing an exception (did_throw), save it as
|
|
1915 * well. On an error not yet converted to an exception, update
|
|
1916 * "force_abort" and reset "cause_abort" (as do_errthrow() would do).
|
|
1917 * This is needed for the do_cmdline() call that is going to be made
|
|
1918 * for autocommand execution. We need not save *msg_list because
|
|
1919 * there is an extra instance for every call of do_cmdline(), anyway.
|
|
1920 */
|
|
1921 if (did_throw || need_rethrow)
|
|
1922 csp->exception = current_exception;
|
|
1923 else
|
|
1924 {
|
|
1925 csp->exception = NULL;
|
|
1926 if (did_emsg)
|
|
1927 {
|
|
1928 force_abort |= cause_abort;
|
|
1929 cause_abort = FALSE;
|
|
1930 }
|
|
1931 }
|
|
1932 did_emsg = got_int = did_throw = need_rethrow = FALSE;
|
|
1933
|
|
1934 /* Report if required by the 'verbose' option or when debugging. */
|
|
1935 report_make_pending(pending, csp->exception);
|
|
1936 }
|
|
1937 else
|
|
1938 {
|
|
1939 csp->pending = CSTP_NONE;
|
|
1940 csp->exception = NULL;
|
|
1941 }
|
|
1942 }
|
|
1943
|
|
1944 /*
|
36
|
1945 * See comment above enter_cleanup() for how this function is used.
|
|
1946 *
|
|
1947 * This function is a bit like ex_endtry() except that there was not actually
|
|
1948 * an extra try block around the part that failed and an error or interrupt
|
|
1949 * had not (yet) been converted to an exception when the cleanup autocommand
|
|
1950 * sequence was invoked.
|
|
1951 *
|
|
1952 * This function has to be called with the address of the cleanup_T structure
|
|
1953 * filled by enter_cleanup() as an argument; it restores the error/interrupt/
|
|
1954 * exception state saved by that function - except there was an aborting
|
|
1955 * error, an interrupt or an uncaught exception during execution of the
|
|
1956 * cleanup autocommands. In the latter case, the saved error/interrupt/
|
|
1957 * exception state is discarded.
|
24
|
1958 */
|
|
1959 void
|
|
1960 leave_cleanup(csp)
|
|
1961 cleanup_T *csp;
|
|
1962 {
|
|
1963 int pending = csp->pending;
|
|
1964
|
|
1965 if (pending == CSTP_NONE) /* nothing to do */
|
|
1966 return;
|
|
1967
|
|
1968 /* If there was an aborting error, an interrupt, or an uncaught exception
|
|
1969 * after the corresponding call to enter_cleanup(), discard what has been
|
|
1970 * made pending by it. Report this to the user if required by the
|
|
1971 * 'verbose' option or when debugging. */
|
|
1972 if (aborting() || need_rethrow)
|
|
1973 {
|
|
1974 if (pending & CSTP_THROW)
|
|
1975 /* Cancel the pending exception (includes report). */
|
|
1976 discard_exception((except_T *)csp->exception, FALSE);
|
|
1977 else
|
|
1978 report_discard_pending(pending, NULL);
|
|
1979
|
|
1980 /* If an error was about to be converted to an exception when
|
|
1981 * enter_cleanup() was called, free the message list. */
|
|
1982 free_msglist(*msg_list);
|
|
1983 *msg_list = NULL;
|
|
1984 }
|
|
1985
|
|
1986 /*
|
|
1987 * If there was no new error, interrupt, or throw between the calls
|
|
1988 * to enter_cleanup() and leave_cleanup(), restore the pending
|
|
1989 * error/interrupt/exception state.
|
|
1990 */
|
|
1991 else
|
|
1992 {
|
|
1993 /*
|
|
1994 * If there was an exception being thrown when enter_cleanup() was
|
|
1995 * called, we need to rethrow it. Make it the exception currently
|
|
1996 * being thrown.
|
|
1997 */
|
|
1998 if (pending & CSTP_THROW)
|
|
1999 current_exception = csp->exception;
|
|
2000
|
|
2001 /*
|
|
2002 * If an error was about to be converted to an exception when
|
|
2003 * enter_cleanup() was called, let "cause_abort" take the part of
|
|
2004 * "force_abort" (as done by cause_errthrow()).
|
|
2005 */
|
|
2006 else if (pending & CSTP_ERROR)
|
|
2007 {
|
|
2008 cause_abort = force_abort;
|
|
2009 force_abort = FALSE;
|
|
2010 }
|
|
2011
|
|
2012 /*
|
|
2013 * Restore the pending values of did_emsg, got_int, and did_throw.
|
|
2014 */
|
|
2015 if (pending & CSTP_ERROR)
|
|
2016 did_emsg = TRUE;
|
|
2017 if (pending & CSTP_INTERRUPT)
|
|
2018 got_int = TRUE;
|
|
2019 if (pending & CSTP_THROW)
|
|
2020 need_rethrow = TRUE; /* did_throw will be set by do_one_cmd() */
|
|
2021
|
|
2022 /* Report if required by the 'verbose' option or when debugging. */
|
|
2023 report_resume_pending(pending,
|
36
|
2024 (pending & CSTP_THROW) ? (void *)current_exception : NULL);
|
24
|
2025 }
|
|
2026 }
|
|
2027
|
|
2028
|
|
2029 /*
|
7
|
2030 * Make conditionals inactive and discard what's pending in finally clauses
|
|
2031 * until the conditional type searched for or a try conditional not in its
|
79
|
2032 * finally clause is reached. If this is in an active catch clause, finish
|
|
2033 * the caught exception.
|
|
2034 * Return the cstack index where the search stopped.
|
75
|
2035 * Values used for "searched_cond" are (CSF_WHILE | CSF_FOR) or CSF_TRY or 0,
|
|
2036 * the latter meaning the innermost try conditional not in its finally clause.
|
|
2037 * "inclusive" tells whether the conditional searched for should be made
|
|
2038 * inactive itself (a try conditional not in its finally claused possibly find
|
|
2039 * before is always made inactive). If "inclusive" is TRUE and
|
|
2040 * "searched_cond" is CSF_TRY|CSF_SILENT, the saved former value of
|
|
2041 * "emsg_silent", if reset when the try conditional finally reached was
|
|
2042 * entered, is restored (unsed by ex_endtry()). This is normally done only
|
|
2043 * when such a try conditional is left.
|
7
|
2044 */
|
|
2045 int
|
|
2046 cleanup_conditionals(cstack, searched_cond, inclusive)
|
|
2047 struct condstack *cstack;
|
|
2048 int searched_cond;
|
|
2049 int inclusive;
|
|
2050 {
|
|
2051 int idx;
|
|
2052 int stop = FALSE;
|
|
2053
|
|
2054 for (idx = cstack->cs_idx; idx >= 0; --idx)
|
|
2055 {
|
|
2056 if (cstack->cs_flags[idx] & CSF_TRY)
|
|
2057 {
|
|
2058 /*
|
|
2059 * Discard anything pending in a finally clause and continue the
|
|
2060 * search. There may also be a pending ":continue", ":break",
|
|
2061 * ":return", or ":finish" before the finally clause. We must not
|
|
2062 * discard it, unless an error or interrupt occurred afterwards.
|
|
2063 */
|
|
2064 if (did_emsg || got_int ||
|
|
2065 (cstack->cs_flags[idx] & CSF_FINALLY))
|
|
2066 {
|
|
2067 switch (cstack->cs_pending[idx])
|
|
2068 {
|
|
2069 case CSTP_NONE:
|
|
2070 break;
|
|
2071
|
|
2072 case CSTP_CONTINUE:
|
|
2073 case CSTP_BREAK:
|
|
2074 case CSTP_FINISH:
|
|
2075 report_discard_pending(cstack->cs_pending[idx], NULL);
|
|
2076 cstack->cs_pending[idx] = CSTP_NONE;
|
|
2077 break;
|
|
2078
|
|
2079 case CSTP_RETURN:
|
|
2080 report_discard_pending(CSTP_RETURN,
|
68
|
2081 cstack->cs_rettv[idx]);
|
|
2082 discard_pending_return(cstack->cs_rettv[idx]);
|
7
|
2083 cstack->cs_pending[idx] = CSTP_NONE;
|
|
2084 break;
|
|
2085
|
|
2086 default:
|
|
2087 if (cstack->cs_flags[idx] & CSF_FINALLY)
|
|
2088 {
|
|
2089 if (cstack->cs_pending[idx] & CSTP_THROW)
|
|
2090 {
|
|
2091 /* Cancel the pending exception. This is in the
|
|
2092 * finally clause, so that the stack of the
|
|
2093 * caught exceptions is not involved. */
|
|
2094 discard_exception((except_T *)
|
|
2095 cstack->cs_exception[idx],
|
|
2096 FALSE);
|
|
2097 }
|
|
2098 else
|
|
2099 report_discard_pending(cstack->cs_pending[idx],
|
|
2100 NULL);
|
|
2101 cstack->cs_pending[idx] = CSTP_NONE;
|
|
2102 }
|
|
2103 break;
|
|
2104 }
|
|
2105 }
|
|
2106
|
|
2107 /*
|
|
2108 * Stop at a try conditional not in its finally clause. If this try
|
|
2109 * conditional is in an active catch clause, finish the caught
|
|
2110 * exception.
|
|
2111 */
|
|
2112 if (!(cstack->cs_flags[idx] & CSF_FINALLY))
|
|
2113 {
|
|
2114 if ((cstack->cs_flags[idx] & CSF_ACTIVE)
|
|
2115 && (cstack->cs_flags[idx] & CSF_CAUGHT))
|
|
2116 finish_exception((except_T *)cstack->cs_exception[idx]);
|
|
2117 /* Stop at this try conditional - except the try block never
|
|
2118 * got active (because of an inactive surrounding conditional
|
|
2119 * or when the ":try" appeared after an error or interrupt or
|
|
2120 * throw). */
|
|
2121 if (cstack->cs_flags[idx] & CSF_TRUE)
|
|
2122 {
|
|
2123 if (searched_cond == 0 && !inclusive)
|
|
2124 break;
|
|
2125 stop = TRUE;
|
|
2126 }
|
|
2127 }
|
|
2128 }
|
|
2129
|
|
2130 /* Stop on the searched conditional type (even when the surrounding
|
|
2131 * conditional is not active or something has been made pending).
|
|
2132 * If "inclusive" is TRUE and "searched_cond" is CSF_TRY|CSF_SILENT,
|
|
2133 * check first whether "emsg_silent" needs to be restored. */
|
|
2134 if (cstack->cs_flags[idx] & searched_cond)
|
|
2135 {
|
|
2136 if (!inclusive)
|
|
2137 break;
|
|
2138 stop = TRUE;
|
|
2139 }
|
|
2140 cstack->cs_flags[idx] &= ~CSF_ACTIVE;
|
|
2141 if (stop && searched_cond != (CSF_TRY | CSF_SILENT))
|
|
2142 break;
|
|
2143
|
|
2144 /*
|
|
2145 * When leaving a try conditinal that reset "emsg_silent" on its entry
|
|
2146 * after saving the original value, restore that value here and free the
|
|
2147 * memory used to store it.
|
|
2148 */
|
|
2149 if ((cstack->cs_flags[idx] & CSF_TRY)
|
|
2150 && (cstack->cs_flags[idx] & CSF_SILENT))
|
|
2151 {
|
|
2152 eslist_T *elem;
|
|
2153
|
|
2154 elem = cstack->cs_emsg_silent_list;
|
|
2155 cstack->cs_emsg_silent_list = elem->next;
|
|
2156 emsg_silent = elem->saved_emsg_silent;
|
|
2157 vim_free(elem);
|
|
2158 cstack->cs_flags[idx] &= ~CSF_SILENT;
|
|
2159 }
|
|
2160 if (stop)
|
|
2161 break;
|
|
2162 }
|
|
2163 return idx;
|
|
2164 }
|
|
2165
|
|
2166 /*
|
75
|
2167 * Return an appropriate error message for a missing endwhile/endfor/endif.
|
|
2168 */
|
|
2169 static char_u *
|
|
2170 get_end_emsg(cstack)
|
|
2171 struct condstack *cstack;
|
|
2172 {
|
|
2173 if (cstack->cs_flags[cstack->cs_idx] & CSF_WHILE)
|
|
2174 return e_endwhile;
|
|
2175 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
|
|
2176 return e_endfor;
|
|
2177 return e_endif;
|
|
2178 }
|
|
2179
|
|
2180
|
|
2181 /*
|
7
|
2182 * Rewind conditionals until index "idx" is reached. "cond_type" and
|
|
2183 * "cond_level" specify a conditional type and the address of a level variable
|
|
2184 * which is to be decremented with each skipped conditional of the specified
|
|
2185 * type.
|
79
|
2186 * Also free "for info" structures where needed.
|
7
|
2187 */
|
79
|
2188 void
|
7
|
2189 rewind_conditionals(cstack, idx, cond_type, cond_level)
|
|
2190 struct condstack *cstack;
|
|
2191 int idx;
|
|
2192 int cond_type;
|
|
2193 int *cond_level;
|
|
2194 {
|
|
2195 while (cstack->cs_idx > idx)
|
|
2196 {
|
|
2197 if (cstack->cs_flags[cstack->cs_idx] & cond_type)
|
|
2198 --*cond_level;
|
79
|
2199 if (cstack->cs_flags[cstack->cs_idx] & CSF_FOR)
|
|
2200 free_for_info(cstack->cs_forinfo[cstack->cs_idx]);
|
7
|
2201 --cstack->cs_idx;
|
|
2202 }
|
|
2203 }
|
|
2204
|
|
2205 /*
|
|
2206 * ":endfunction" when not after a ":function"
|
|
2207 */
|
|
2208 /*ARGSUSED*/
|
|
2209 void
|
|
2210 ex_endfunction(eap)
|
|
2211 exarg_T *eap;
|
|
2212 {
|
|
2213 EMSG(_("E193: :endfunction not inside a function"));
|
|
2214 }
|
|
2215
|
|
2216 /*
|
75
|
2217 * Return TRUE if the string "p" looks like a ":while" or ":for" command.
|
7
|
2218 */
|
|
2219 int
|
75
|
2220 has_loop_cmd(p)
|
7
|
2221 char_u *p;
|
|
2222 {
|
|
2223 p = skipwhite(p);
|
|
2224 while (*p == ':')
|
|
2225 p = skipwhite(p + 1);
|
75
|
2226 if ((p[0] == 'w' && p[1] == 'h')
|
|
2227 || (p[0] == 'f' && p[1] == 'o' && p[2] == 'r'))
|
7
|
2228 return TRUE;
|
|
2229 return FALSE;
|
|
2230 }
|
|
2231
|
|
2232 #endif /* FEAT_EVAL */
|