Added optional Lua lexer support.

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

1 files changed, 56 insertions, 0 deletions

diff --git a/lexlua/pike.lua b/lexlua/pike.lua
new file mode 100644
index 000000000..77caed4c9
--- /dev/null
+++ b/lexlua/pike.lua
@@ -0,0 +1,56 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Pike 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('pike')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  break case catch continue default do else for foreach gauge if lambda return
+  sscanf switch while import inherit
+  -- Type modifiers.
+  constant extern final inline local nomask optional private protected public
+  static variant
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  array class float function int mapping mixed multiset object program string
+  void
+]]))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'", true) +
+                                           lexer.delimited_range('"', true) +
+                                           '#' * lexer.delimited_range('"')))
+
+-- Comments.
+lex:add_rule('comment', token(lexer.COMMENT, '//' * lexer.nonnewline_esc^0 +
+                                             lexer.nested_pair('/*', '*/')))
+
+-- Numbers.
+lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) *
+                                           S('lLdDfF')^-1))
+
+-- Preprocessors.
+lex:add_rule('preprocessor', token(lexer.PREPROCESSOR, lexer.starts_line('#') *
+                                                       lexer.nonnewline^0))
+
+-- 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('//'))
+
+return lex