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