1 files changed, 90 insertions, 0 deletions
diff --git a/lexlua/xtend.lua b/lexlua/xtend.lua
new file mode 100644
index 000000000..452080e45
--- /dev/null
+++ b/lexlua/xtend.lua
@@ -0,0 +1,90 @@
+-- Copyright (c) 2014-2018 Piotr Orzechowski [drzewo.org]. See License.txt.
+-- Xtend 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('xtend')
+
+-- Whitespace.
+local ws = token(lexer.WHITESPACE, lexer.space^1)
+lex:add_rule('whitespace', ws)
+
+-- Classes.
+lex:add_rule('class', token(lexer.KEYWORD, P('class')) * ws^1 *
+                      token(lexer.CLASS, lexer.word))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  -- General.
+  abstract annotation as case catch class create def default dispatch do else
+  enum extends extension final finally for if implements import interface
+  instanceof it new override package private protected public return self static
+  super switch synchronized this throw throws try typeof val var while
+  -- Templates.
+  -- AFTER BEFORE ENDFOR ENDIF FOR IF SEPARATOR
+  -- Literals.
+  true false null
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  boolean byte char double float int long short void
+  Boolean Byte Character Double Float Integer Long Short String
+]]))
+
+-- Functions.
+lex:add_rule('function', token(lexer.FUNCTION, lexer.word) * #P('('))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Templates.
+lex:add_rule('template', token('template', "'''" * (lexer.any - P("'''"))^0 *
+                                           P("'''")^-1))
+lex:add_style('template', lexer.STYLE_EMBEDDED)
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'", true) +
+                                           lexer.delimited_range('"', true)))
+
+-- Comments.
+local line_comment = '//' * lexer.nonnewline_esc^0
+local block_comment = '/*' * (lexer.any - '*/')^0 * P('*/')^-1
+lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
+
+-- Numbers.
+local small_suff = S('lL')
+local med_suff = S('bB') * S('iI')
+local large_suff = S('dD') + S('fF') + S('bB') * S('dD')
+local exp = S('eE') * lexer.digit^1
+
+local dec_inf = ('_' * lexer.digit^1)^0
+local hex_inf = ('_' * lexer.xdigit^1)^0
+local float_pref = lexer.digit^1 * '.' * lexer.digit^1
+local float_suff = exp^-1 * med_suff^-1 * large_suff^-1
+
+local dec = lexer.digit * dec_inf * (small_suff^-1 + float_suff)
+local hex = lexer.hex_num * hex_inf * P('#' * (small_suff + med_suff))^-1
+local float = float_pref * dec_inf * float_suff
+
+lex:add_rule('number', token(lexer.NUMBER, float + hex + dec))
+
+-- Annotations.
+lex:add_rule('annotation', token('annotation', '@' * lexer.word))
+lex:add_style('annotation', lexer.STYLE_PREPROCESSOR)
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}#')))
+
+-- Error.
+lex:add_rule('error', token(lexer.ERROR, lexer.any))
+
+-- 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.KEYWORD, 'import', lexer.fold_line_comments('import'))
+
+return lex