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remove invalid code from TRE 

TRE wants to treat + and ? after a +, ?, or * as special; ? means
ungreedy and + is reserved for future use. however, this is
non-conformant. although redundant, these redundant characters have
well-defined (no-op) meaning for POSIX ERE, and are actually _literal_
characters (which TRE is wrongly ignoring) in POSIX BRE mode.

the simplest fix is to simply remove the unneeded nonstandard
functionality. as a plus, this shaves off a small amount of bloat.
This commit is contained in:
Rich Felker 2012-04-13 19:50:58 -04:00
parent b6dbdc69b6
commit 386b34a07b
1 changed files with 0 additions and 14 deletions
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14
src/regex/regcomp.c
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@ -1105,20 +1105,6 @@ tre_parse(tre_parse_ctx_t *ctx)
if (*ctx->re == CHAR_QUESTIONMARK)
rep_max = 1;
{
if (*(ctx->re + 1) == CHAR_QUESTIONMARK)
{
minimal = 1;
ctx->re++;
}
else if (*(ctx->re + 1) == CHAR_STAR
|| *(ctx->re + 1) == CHAR_PLUS)
{
/* These are reserved for future extensions. */
return REG_BADRPT;
}
}
ctx->re++;
tmp_node = tre_ast_new_iter(ctx->mem, result, rep_min, rep_max,
minimal);