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Diffstat (limited to 'ext/pcre/pcrelib/doc/Tech.Notes')
| -rw-r--r-- | ext/pcre/pcrelib/doc/Tech.Notes | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/ext/pcre/pcrelib/doc/Tech.Notes b/ext/pcre/pcrelib/doc/Tech.Notes index 03904db3cc..7b96e5b60e 100644 --- a/ext/pcre/pcrelib/doc/Tech.Notes +++ b/ext/pcre/pcrelib/doc/Tech.Notes @@ -202,9 +202,10 @@ Forward assertions are just like other subpatterns, but starting with one of the opcodes OP_ASSERT or OP_ASSERT_NOT. Backward assertions use the opcodes OP_ASSERTBACK and OP_ASSERTBACK_NOT, and the first opcode inside the assertion is OP_REVERSE, followed by a two byte count of the number of characters to move -back the pointer in the subject string. A separate count is present in each -alternative of a lookbehind assertion, allowing them to have different fixed -lengths. +back the pointer in the subject string. When operating in UTF-8 mode, the count +is a character count rather than a byte count. A separate count is present in +each alternative of a lookbehind assertion, allowing them to have different +fixed lengths. Once-only subpatterns @@ -239,4 +240,4 @@ the compiled data. Philip Hazel -February 2000 +August 2000 |