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Factor out common sub-expression from multi-line-comment regular expression.

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In two places we look for an (optional) sequence of characters other
than "*" followed by a sequence of on or more "*". Using a name for
this (NON_STARS_THEN_STARS) seems to make it a bit easier to
understand.
This commit is contained in:
Carl Worth 2010-06-02 12:54:15 -07:00
parent e4b2731a25
commit 111e25bd84
1 changed files with 3 additions and 1 deletions
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4
glcpp-lex.l
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@ -45,6 +45,8 @@ DECIMAL_INTEGER [1-9][0-9]*[uU]?
OCTAL_INTEGER 0[0-7]*[uU]?
HEXADECIMAL_INTEGER 0[xX][0-9a-fA-F]+[uU]?
NON_STARS_THEN_STARS [^*]*[*]+
%%
/* Single-line comments */
@ -53,7 +55,7 @@ HEXADECIMAL_INTEGER 0[xX][0-9a-fA-F]+[uU]?
}
/* Multi-line comments */
"/*"([^*]*[*]+[^*/])*[^*]*[*]+"/" {
"/*"({NON_STARS_THEN_STARS}[^*/])*{NON_STARS_THEN_STARS}"/" {
if (yyextra->space_tokens)
return SPACE;
}