1 files changed, 62 insertions, 0 deletions
diff --git a/lexers/smalltalk.lua b/lexers/smalltalk.lua
new file mode 100644
index 0000000..298173f
--- /dev/null
+++ b/lexers/smalltalk.lua
@@ -0,0 +1,62 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Smalltalk LPeg lexer.
+
+local l = require('lexer')
+local token, word_match = l.token, l.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local M = {_NAME = 'smalltalk'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local comment = token(l.COMMENT, l.delimited_range('"', false, true))
+
+-- Strings.
+local sq_str = l.delimited_range("'")
+local literal = '$' * l.word
+local string = token(l.STRING, sq_str + literal)
+
+-- Numbers.
+local number = token(l.NUMBER, l.float + l.integer)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'true', 'false', 'nil', 'self', 'super', 'isNil', 'not', 'Smalltalk',
+  'Transcript'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'Date', 'Time', 'Boolean', 'True', 'False', 'Character', 'String', 'Array',
+  'Symbol', 'Integer', 'Object'
+})
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S(':=_<>+-/*!()[]'))
+
+-- Labels.
+local label = token(l.LABEL, '#' * l.word)
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'type', type},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'label', label},
+  {'operator', operator},
+}
+
+M._foldsymbols = {
+  _patterns = {'[%[%]]'},
+  [l.OPERATOR] = {['['] = 1, [']'] = -1}
+}
+
+return M