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| author | Karl Williamson <khw@cpan.org> | 2022-07-07 14:05:30 -0600 |
|---|---|---|
| committer | Karl Williamson <khw@cpan.org> | 2022-07-07 14:26:37 -0600 |
| commit | ac5774295b983d28fdf7ca39b2c7fb13051d7293 (patch) | |
| tree | f1d509cd4d98027ba237b60c3d4d6795579ff7ba /regnodes.h | |
| parent | abca373104cc0bd03c35cb4eafe43ccce48bfddc (diff) | |
| download | perl-ac5774295b983d28fdf7ca39b2c7fb13051d7293.tar.gz | |
regcomp.sym: Add commentary
Diffstat (limited to 'regnodes.h')
| -rw-r--r-- | regnodes.h | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/regnodes.h b/regnodes.h index 36e79985bf..fdb7ae0d9b 100644 --- a/regnodes.h +++ b/regnodes.h @@ -647,7 +647,9 @@ #define TAIL_t8_p8 243 /* 0x0f3 */ #define STAR 61 /* 0x3d Match this (simple) - thing 0 or more times. */ + thing 0 or more times: + /A{0,}B/ where A is width 1 + char */ #define STAR_tb 122 /* 0x07a */ #define STAR_t8 123 /* 0x07b */ #define STAR_tb_pb 244 /* 0x0f4 */ @@ -656,7 +658,9 @@ #define STAR_t8_p8 247 /* 0x0f7 */ #define PLUS 62 /* 0x3e Match this (simple) - thing 1 or more times. */ + thing 1 or more times: + /A{1,}B/ where A is width 1 + char */ #define PLUS_tb 124 /* 0x07c */ #define PLUS_t8 125 /* 0x07d */ #define PLUS_tb_pb 248 /* 0x0f8 */ @@ -664,8 +668,9 @@ #define PLUS_t8_pb 250 /* 0x0fa */ #define PLUS_t8_p8 251 /* 0x0fb */ -#define CURLY 63 /* 0x3f Match this simple thing - {n,m} times. */ +#define CURLY 63 /* 0x3f Match this (simple) + thing {n,m} times: /A{m,n}B/ + where A is width 1 char */ #define CURLY_tb 126 /* 0x07e */ #define CURLY_t8 127 /* 0x07f */ #define CURLY_tb_pb 252 /* 0x0fc */ @@ -674,7 +679,8 @@ #define CURLY_t8_p8 255 /* 0x0ff */ #define CURLYN 64 /* 0x40 Capture next-after-this - simple thing */ + simple thing: /(A){m,n}B/ + where A is width 1 char */ #define CURLYN_tb 128 /* 0x080 */ #define CURLYN_t8 129 /* 0x081 */ #define CURLYN_tb_pb 256 /* 0x100 */ @@ -684,7 +690,8 @@ #define CURLYM 65 /* 0x41 Capture this medium-complex thing {n,m} - times. */ + times: /(A){m,n}B/ where A + is fixed-length */ #define CURLYM_tb 130 /* 0x082 */ #define CURLYM_t8 131 /* 0x083 */ #define CURLYM_tb_pb 260 /* 0x104 */ @@ -692,8 +699,9 @@ #define CURLYM_t8_pb 262 /* 0x106 */ #define CURLYM_t8_p8 263 /* 0x107 */ -#define CURLYX 66 /* 0x42 Match this complex - thing {n,m} times. */ +#define CURLYX 66 /* 0x42 Match/Capture this + complex thing {n,m} times. + */ #define CURLYX_tb 132 /* 0x084 */ #define CURLYX_t8 133 /* 0x085 */ #define CURLYX_tb_pb 264 /* 0x108 */ |