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Element: <ChainBlock>
Sometimes we don’t want to switch back into outer scheme, after exit from inner scheme given by <RegexBlock>. We may want to switch into another inner scheme, parse it, and then switch back into outer scheme. For example, look at Perl regexp-substitute construct parsing:
my $v = s/([^\0]*) / '$1'/ ;
^^ Main scheme ^^ ^^ switch to ^^ switch to ^^^ switch back ^^
regex-search regex-subst to Main scheme
inner scheme inner scheme
| • | Attribute: innerScheme, type: string, case-sensitive, scheme reference
Causes parser to switch inside specified scheme to parse matched text.
Same as <RegexBlock> innerScheme attribute. For more, look there. |
| • | Attribute: name, type: string, case-sensitive
Used to refer this block from <RegexBlock>. |
| • | Attribute: end, type: Regular expression
This attribute gives regular expression which ends parsing scheme referred by innerScheme attribute. Same as end attribute of <RegexBlock>. |
| • | Attribute: end_moreWordSeparators, type: string.
This attribute extends default word separator chars, used by \b regexp operator, for this end regexp attribute only.
See topic in regexps section.
See <KeywordRegex> element for example. |
| • | Attribute: end_moreWordChars, type: string.
This attribute extends default word chars, used by \b regexp operator, for this end regexp attribute only. See links above. |
| • | Attribute: end_token0..N, type: string, case-sensitive, <Token> reference
This attribute splits text matched by end regexp by tokens. Splitting rules same as for token0..N of <RegexBlock> element (see more above). |
| • | Attribute: chainBlock, type: string, case-sensitive, <ChainBlock> reference
This attribute instructs parser after end of innerScheme don’t switch back to outer scheme. Instead, parser should switch to innerScheme of specified <ChainBlock>.
Same as chainBlock attribute of <RegexBlock> node. |
Example of <ChainBlock> using (Perl regexp substition operator)
<!--This will highlight second part of subst-expression,
and switch back into outer (main) scheme -->
<ChainBlock name='RegexSubstEnd'
end_token0='regexEnd'
innerScheme='RegexSubst' >
<End> /[egimosx]* </End>
</ChainBlock>
<!--This will highlight first part of subst-expression -->
<!--After end of first part, parser will switch into
RegexSubst scheme, specified by chainBlock='RegexSubstEnd' -->
<RegexBlock innerScheme='RegexFind'
start_token0='regexStart'
end_token0='regexEnd'
chainBlock='RegexSubstEnd'>
<Start> s/ </Start>
<End> / </End>
</RegexBlock>
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