Added optional Lua lexer support.

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

1 files changed, 64 insertions, 0 deletions

diff --git a/lexlua/boo.lua b/lexlua/boo.lua
new file mode 100644
index 000000000..d1b1d6849
--- /dev/null
+++ b/lexlua/boo.lua
@@ -0,0 +1,64 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Boo 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('boo')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  and break cast continue elif else ensure except for given goto if in isa is
+  not or otherwise pass raise ref try unless when while
+  -- Definitions.
+  abstract callable class constructor def destructor do enum event final get
+  interface internal of override partial private protected public return set
+  static struct transient virtual yield
+  -- Namespaces.
+  as from import namespace
+  -- Other.
+  self super null true false
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  bool byte char date decimal double duck float int long object operator regex
+  sbyte short single string timespan uint ulong ushort
+]]))
+
+-- Functions.
+lex:add_rule('function', token(lexer.FUNCTION, word_match[[
+  array assert checked enumerate __eval__ filter getter len lock map matrix max
+  min normalArrayIndexing print property range rawArrayIndexing required
+  __switch__ typeof unchecked using yieldAll zip
+]]))
+
+-- 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 triple_dq_str = '"""' * (lexer.any - '"""')^0 * P('"""')^-1
+local regex_str = #P('/') * lexer.last_char_includes('!%^&*([{-=+|:;,?<>~') *
+                  lexer.delimited_range('/', true)
+lex:add_rule('string', token(lexer.STRING, triple_dq_str + sq_str + dq_str) +
+                       token(lexer.REGEX, regex_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('msdhsfFlL') + 'ms')^-1))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('!%^&*()[]{}-=+/|:;.,?<>~`')))
+
+return lex