LMD SyntaxEdit Schemes Language Reference

Chain Block

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

<!--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>

<!--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'>

</RegexBlock>