New checker for lex: flex.

README.markdown

@@ -28,12 +28,12 @@ execute their script to find them.
 At the time of this writing, syntax checking plugins exist for Ada,
 AppleScript, AsciiDoc, Bourne shell, C, C++, C#, Chef, CoffeeScript, Coco,
 Coq, CSS, Cucumber, CUDA, D, Dart, DocBook, Dust, Elixir, Erlang, eRuby,
-Fortran, Gentoo metadata, Go, Haml, Haskell, Haxe, Handlebars, HSS, HTML, Java,
-JavaScript, JSON, LESS, Limbo, LISP, LLVM intermediate language, Lua, MATLAB,
-NASM, Objective-C, Objective-C++, OCaml, Perl, Perl POD, PHP, gettext Portable
-Object, Puppet, Python, Racket, reStructuredText, Ruby, Rust, SASS/SCSS, Scala,
-Slim, Tcl, TeX, Twig, TypeScript, Vala, Verilog, VHDL, xHtml, XML, XSLT, YAML,
-z80, Zope page templates, zsh.
+Fortran, Gentoo metadata, Go, Haml, Haskell, Haxe, Handlebars, HSS, HTML,
+Java, JavaScript, JSON, LESS, Lex, Limbo, LISP, LLVM intermediate language,
+Lua, MATLAB, NASM, Objective-C, Objective-C++, OCaml, Perl, Perl POD, PHP,
+gettext Portable Object, Puppet, Python, Racket, reStructuredText, Ruby, Rust,
+SASS/SCSS, Scala, Slim, Tcl, TeX, Twig, TypeScript, Vala, Verilog, VHDL, xHtml,
+XML, XSLT, YAML, z80, Zope page templates, zsh.
 
 ## Screenshot
 

plugin/syntastic/registry.vim

@@ -37,6 +37,7 @@ let s:defaultCheckers = {
         \ 'javascript':  ['jshint', 'jslint'],
         \ 'json':        ['jsonlint', 'jsonval'],
         \ 'less':        ['lessc'],
+        \ 'lex':         ['flex'],
         \ 'limbo':       ['limbo'],
         \ 'lisp':        ['clisp'],
         \ 'llvm':        ['llvm'],

syntax_checkers/lex/flex.vim

@@ -0,0 +1,48 @@
+"============================================================================
+"File:        lex.vim
+"Description: Syntax checking plugin for syntastic.vim
+"Maintainer:  LCD 47 <lcd047 at gmail dot com>
+"License:     This program is free software. It comes without any warranty,
+"             to the extent permitted by applicable law. You can redistribute
+"             it and/or modify it under the terms of the Do What The Fuck You
+"             Want To Public License, Version 2, as published by Sam Hocevar.
+"             See http://sam.zoy.org/wtfpl/COPYING for more details.
+"
+"============================================================================
+
+if exists("g:loaded_syntastic_lex_flex_checker")
+    finish
+endif
+let g:loaded_syntastic_lex_flex_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_lex_flex_GetHighlightRegex(item)
+    let term = matchstr(a:item['text'],
+        \ '\m^\(unrecognized %option\|bad <start condition>\|bad character\( class expression\)\=\): \zs.*')
+    if term == ''
+        let term = matchstr(a:item['text'],
+            \ '\m^\(Definition value for\|undefined definition\) {\zs[^}]\+\ze}')
+    endif
+
+    return term != '' ? '\V' . term : ''
+endfunction
+
+function! SyntaxCheckers_lex_flex_GetLocList() dict
+    let makeprg = self.makeprgBuild({
+        \ 'exe': self.getExec() . ' ' . syntastic#c#NullOutput() })
+
+    let errorformat = '%f:%l: %m'
+
+    return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'lex',
+    \ 'name': 'flex'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo