vimscript syntax not pattern

Question

I have this vimscript:

syn region      fdocCommand     start="^@" end="$" contained 
syn region      fdocComment     start="^@" end="^@tangle " contains=fdocCommand keepend
" syn region      fdocComment     start="^@" end="^@felix" contains=fdocCommand keepend

but what i need is the region defined by: start="^@" followed by anything except "tangle" or "felix" and ended by either "@tangle" or "@felix". A weaker form would actually do, either the @tangle line above OR the commented out @felix line.

The actual use is a literate programming tool with @commands like @h1 heading, @title, etc, and code is introduced by @felix or @tangle and ended by the next @command. As it happens my webserver can display this with syntax highlighting and hyperlinking, and the real set of code commands include @python, @ocaml, @c++ etc. For Felix, the @..@felix sequence is actually recognised by the compiler as a comment, so the literate code can be compiled directly.

Ingo Karkat · Accepted Answer · 2015-05-26 07:52:35Z

2

To start a region only with @commands that are not @tangle, you need negative lookahead via \@!: ^@\%(tangle\)\@!. To ensure that it's really only tangle, not something starting with tangle, you need an additional $ assertion; and to not match felix, too, another branch: ^@\%(\%(tangle\|felix\)$\)\@!

So, this should do:

syn region      fdocComment     start="^@\%(\%(tangle\|felix\)$\)\@!" end="^@\%(tangle\|felix\)$" contains=fdocCommand keepend

answered May 26, 2015 at 7:52

Ingo Karkat

174k16 gold badges265 silver badges341 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Yttrill Over a year ago

Thanks! This seems to work: syn region fdocComment start="^@\%(\%(tangle \|felix))\@!" end="^@\%(tangle \|felix)" contains=fdocCommand keepend.

Collectives™ on Stack Overflow

vimscript syntax not pattern

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related