Added optional Lua lexer support.

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

1 files changed, 59 insertions, 0 deletions

diff --git a/lexlua/actionscript.lua b/lexlua/actionscript.lua
new file mode 100644
index 000000000..80d46a53c
--- /dev/null
+++ b/lexlua/actionscript.lua
@@ -0,0 +1,59 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Actionscript LPeg lexer.
+
+local lexer = require('lexer')
+local token, word_match = lexer.token, lexer.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local lex = lexer.new('actionscript')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  break continue delete do else for function if in new on return this typeof var
+  void while with NaN Infinity false null true undefined
+  -- Reserved for future use.
+  abstract case catch class const debugger default export extends final finally
+  goto implements import instanceof interface native package private Void
+  protected public dynamic static super switch synchonized throw throws
+  transient try volatile
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  Array Boolean Color Date Function Key MovieClip Math Mouse Number Object
+  Selection Sound String XML XMLNode XMLSocket
+  -- Reserved for future use.
+  boolean byte char double enum float int long short
+]]))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+local sq_str = lexer.delimited_range("'", true)
+local dq_str = lexer.delimited_range('"', true)
+local ml_str = '<![CDATA[' * (lexer.any - ']]>')^0 * ']]>'
+lex:add_rule('string', token(lexer.STRING, sq_str + dq_str + ml_str))
+
+-- Comments.
+local line_comment = '//' * lexer.nonnewline^0
+local block_comment = '/*' * (lexer.any - '*/')^0 * P('*/')^-1
+lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
+
+-- Numbers.
+lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) *
+                                           S('LlUuFf')^-2))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('=!<>+-/*%&|^~.,;?()[]{}')))
+
+-- Fold points.
+lex:add_fold_point(lexer.OPERATOR, '{', '}')
+lex:add_fold_point(lexer.COMMENT, '/*', '*/')
+lex:add_fold_point(lexer.COMMENT, '//', lexer.fold_line_comments('//'))
+lex:add_fold_point(lexer.STRING, '<![CDATA[', ']]>')
+
+return lex