Added optional Lua lexer support.

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

1 files changed, 60 insertions, 0 deletions

diff --git a/lexlua/vala.lua b/lexlua/vala.lua
new file mode 100644
index 000000000..ebc930392
--- /dev/null
+++ b/lexlua/vala.lua
@@ -0,0 +1,60 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Vala 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('vala')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  class delegate enum errordomain interface namespace signal struct using
+  -- Modifiers.
+  abstract const dynamic extern inline out override private protected public ref
+  static virtual volatile weak
+  -- Other.
+  as base break case catch construct continue default delete do else ensures
+  finally for foreach get if in is lock new requires return set sizeof switch
+  this throw throws try typeof value var void while
+  -- Etc.
+  null true false
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  bool char double float int int8 int16 int32 int64 long short size_t ssize_t
+  string uchar uint uint8 uint16 uint32 uint64 ulong unichar ushort
+]]))
+
+-- 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 tq_str = '"""' * (lexer.any - '"""')^0 * P('"""')^-1
+local ml_str = '@' * lexer.delimited_range('"', false, true)
+lex:add_rule('string', token(lexer.STRING, tq_str + sq_str + dq_str + ml_str))
+
+-- 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.
+lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) *
+                                           S('uUlLfFdDmM')^-1))
+
+-- 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