1 files changed, 46 insertions, 0 deletions
diff --git a/lexlua/smalltalk.lua b/lexlua/smalltalk.lua
new file mode 100644
index 000000000..3cf0d2656
--- /dev/null
+++ b/lexlua/smalltalk.lua
@@ -0,0 +1,46 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- Smalltalk 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('smalltalk')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
+  true false nil self super isNil not Smalltalk Transcript
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  Date Time Boolean True False Character String Array Symbol Integer Object
+]]))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'") +
+                                           '$' * lexer.word))
+
+-- Comments.
+lex:add_rule('comment', token(lexer.COMMENT,
+                              lexer.delimited_range('"', false, true)))
+
+-- Numbers.
+lex:add_rule('number', token(lexer.NUMBER, lexer.float + lexer.integer))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S(':=_<>+-/*!()[]')))
+
+-- Labels.
+lex:add_rule('label', token(lexer.LABEL, '#' * lexer.word))
+
+-- Fold points.
+lex:add_fold_point(lexer.OPERATOR, '[', ']')
+
+return lex