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| author | Peter Eisentraut <peter@eisentraut.org> | 2021-11-24 09:10:32 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2021-12-01 16:10:52 +0100 |
| commit | fb7f70112fd80f13a8f124f51c4992fe290d3836 (patch) | |
| tree | 6b69a74df55b061a056ca908e185aeef3bd532b7 /src/fe_utils | |
| parent | 75d22069e00d638d08c04e3aba71688f3fb002ed (diff) | |
| download | postgresql-fb7f70112fd80f13a8f124f51c4992fe290d3836.tar.gz postgresql-fb7f70112fd80f13a8f124f51c4992fe290d3836.zip | |
Improve some comments in scanner files
Reviewed-by: John Naylor <john.naylor@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/b239564c-cad0-b23e-c57e-166d883cb97d@enterprisedb.com
Diffstat (limited to 'src/fe_utils')
| -rw-r--r-- | src/fe_utils/psqlscan.l | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/fe_utils/psqlscan.l b/src/fe_utils/psqlscan.l index 0fab48a3825..b0fd4394ec6 100644 --- a/src/fe_utils/psqlscan.l +++ b/src/fe_utils/psqlscan.l @@ -112,7 +112,7 @@ extern void psql_yyset_column(int column_no, yyscan_t yyscanner); * <xb> bit string literal * <xc> extended C-style comments * <xd> delimited identifiers (double-quoted identifiers) - * <xh> hexadecimal numeric string + * <xh> hexadecimal byte string * <xq> standard quoted strings * <xqs> quote stop (detect continued strings) * <xe> extended quoted strings (support backslash escape sequences) @@ -200,7 +200,7 @@ quotecontinuefail {whitespace}*"-"? xbstart [bB]{quote} xbinside [^']* -/* Hexadecimal number */ +/* Hexadecimal byte string */ xhstart [xX]{quote} xhinside [^']* @@ -279,7 +279,6 @@ xcstart \/\*{op_chars}* xcstop \*+\/ xcinside [^*/]+ -digit [0-9] ident_start [A-Za-z\200-\377_] ident_cont [A-Za-z\200-\377_0-9\$] @@ -318,15 +317,18 @@ self [,()\[\].;\:\+\-\*\/\%\^\<\>\=] op_chars [\~\!\@\#\^\&\|\`\?\+\-\*\/\%\<\>\=] operator {op_chars}+ -/* we no longer allow unary minus in numbers. - * instead we pass it separately to parser. there it gets - * coerced via doNegate() -- Leon aug 20 1999 +/* + * Numbers + * + * Unary minus is not part of a number here. Instead we pass it separately to + * the parser, and there it gets coerced via doNegate(). * * {decimalfail} is used because we would like "1..10" to lex as 1, dot_dot, 10. * * {realfail1} and {realfail2} are added to prevent the need for scanner * backup when the {real} rule fails to match completely. */ +digit [0-9] integer {digit}+ decimal (({digit}*\.{digit}+)|({digit}+\.{digit}*)) |