Added optional Lua lexer support.

This support is disabled by default and must be enabled via compile-time option.

1 files changed, 24 insertions, 0 deletions

diff --git a/lexlua/sass.lua b/lexlua/sass.lua
new file mode 100644
index 000000000..5a1bd944b
--- /dev/null
+++ b/lexlua/sass.lua
@@ -0,0 +1,24 @@
+-- Copyright 2006-2018 Robert Gieseke. See License.txt.
+-- Sass CSS preprocessor LPeg lexer.
+-- http://sass-lang.com
+
+local lexer = require('lexer')
+local token = lexer.token
+local P, S = lpeg.P, lpeg.S
+
+local lex = lexer.new('sass', {inherit = lexer.load('css')})
+
+-- Line comments.
+lex:add_rule('line_comment', token(lexer.COMMENT, '//' * lexer.nonnewline^0))
+
+-- Variables.
+lex:add_rule('variable', token(lexer.VARIABLE, '$' * (lexer.alnum + S('_-'))^1))
+
+-- Mixins.
+lex:add_rule('mixin', token('mixin', P('@') * lexer.word))
+lex:add_style('mixin', lexer.STYLE_FUNCTION)
+
+-- Fold points.
+lex:add_fold_point(lexer.COMMENT, '//', lexer.fold_line_comments('//'))
+
+return lex