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Fix error in documentation.

This commit is contained in:
Philip.Hazel 2016-10-28 16:08:44 +00:00
parent 8eae402315
commit e036cda7ea
1 changed files with 77 additions and 69 deletions
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@ -175,7 +175,6 @@ systems) it occupies two elements. The following meta items occupy just one
element, with no data: element, with no data:
META_ACCEPT (*ACCEPT) META_ACCEPT (*ACCEPT)
META_ALT | alternation
META_ASTERISK * META_ASTERISK *
META_ASTERISK_PLUS *+ META_ASTERISK_PLUS *+
META_ASTERISK_QUERY *? META_ASTERISK_QUERY *?
@ -216,11 +215,15 @@ relevant.
The following have data in the lower 16 bits, and may be followed by other data The following have data in the lower 16 bits, and may be followed by other data
elements: elements:
META_ALT | alternation
META_BACKREF META_BACKREF
META_CAPTURE META_CAPTURE
META_ESCAPE META_ESCAPE
META_RECURSE META_RECURSE
If the data for META_ALT is non-zero, it is inside a lookbehind, and the data
is the length of its branch, for which OP_REVERSE must be generated.
META_BACKREF, META_CAPTURE, and META_RECURSE have the capture group number as META_BACKREF, META_CAPTURE, and META_RECURSE have the capture group number as
their data in the lower 16 bits of the element. their data in the lower 16 bits of the element.
@ -275,13 +278,18 @@ The following are followed just by an offset, for use in error messages:
META_COND_ASSERT (?(?assertion) META_COND_ASSERT (?(?assertion)
META_COND_DEFINE (?(DEFINE) META_COND_DEFINE (?(DEFINE)
META_LOOKBEHIND (?<=
META_LOOKBEHINDNOT (?<!
In fact, META_COND_ASSERT is used for any group starting (?( that does not In fact, META_COND_ASSERT is used for any group starting (?( that does not
match any of the other META_COND cases. The check that this group is an match any of the other META_COND cases. The check that this group is an
assertion (optionally preceded by a callout) happens at compile time. assertion (optionally preceded by a callout) happens at compile time.
The following are also followed just by an offset, but also the lower 16 bits
of the main word contain the length of the first branch of the lookbehind
group; this is used when generating OP_REVERSE for that branch.
META_LOOKBEHIND (?<=
META_LOOKBEHINDNOT (?<!
The following are followed by two values, the minimum and maximum. Repeat The following are followed by two values, the minimum and maximum. Repeat
values are limited to 65535 (MAX_REPEAT). A maximum value of "unlimited" is values are limited to 65535 (MAX_REPEAT). A maximum value of "unlimited" is
represented by UNLIMITED_REPEAT, which is bigger than MAX_REPEAT: represented by UNLIMITED_REPEAT, which is bigger than MAX_REPEAT: