Minor fixes to improve regex debugging code.
When REG_DEBUG is defined, ensure that an un-filled "struct cnfa"
is all-zeroes, not just that it has nstates == 0. This is mainly
so that looking at "struct subre" structs in gdb doesn't distract
one with a lot of garbage fields during regex compilation.
Adjust some places that print debug output to have suitable fflush
calls afterwards.
In passing, correct an erroneous ancient comment: the concatenation
subre-s created by parsebranch() have op == '.' not ','.
Noted while fooling around with some regex performance improvements.
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/2dd6733108f2bea07b0a3469e768bd900c0808b3
Modified Files
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src/backend/regex/regc_nfa.c | 6 +++---
src/backend/regex/regcomp.c | 5 ++++-
src/include/regex/regguts.h | 8 ++++++++
3 files changed, 15 insertions(+), 4 deletions(-)