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(code_start): Initialize it to scanner_cursor,

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not loc->end, since loc->end might contain garbage and this leads
to undefined behavior on some platforms.
(id_loc, token_start): Use (IF_LINTed) initial values that do not
depend on *loc, so that the reader doesn't give the the false
impression that *loc is initialized.
(<INITIAL>"%%"): Do not bother setting code_start, since its value
does not survive the return.
This commit is contained in:
Paul Eggert
2003-03-02 06:55:15 +00:00
parent 0433ba88f9
commit a2bc9dbc7b
1 changed files with 7 additions and 9 deletions
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16
src/scan-gram.l
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@@ -136,15 +136,16 @@ splice (\\[ \f\t\v]*\n)*
int token_type IF_LINT (= 0); int token_type IF_LINT (= 0);
/* Location of most recent identifier, when applicable. */ /* Location of most recent identifier, when applicable. */
location id_loc IF_LINT (= *loc); location id_loc IF_LINT (= empty_location);
/* Where containing code started, when applicable. /* Where containing code started, when applicable. Its initial
Once the second %% seen, we are looking for the epilogue. */ value is relevant only when yylex is invoked in the SC_EPILOGUE
boundary code_start = loc->end; start condition. */
boundary code_start = scanner_cursor;
/* Where containing comment or string or character literal started, /* Where containing comment or string or character literal started,
when applicable. */ when applicable. */
boundary token_start IF_LINT (= loc->start); boundary token_start IF_LINT (= scanner_cursor);
%} %}
@@ -271,10 +272,7 @@ splice (\\[ \f\t\v]*\n)*
"%%" { "%%" {
static int percent_percent_count; static int percent_percent_count;
if (++percent_percent_count == 2) if (++percent_percent_count == 2)
{ BEGIN SC_EPILOGUE;
code_start = loc->start;
BEGIN SC_EPILOGUE;
}
return PERCENT_PERCENT; return PERCENT_PERCENT;
} }