1 files changed, 78 insertions, 0 deletions
diff --git a/lexers/go.lua b/lexers/go.lua
new file mode 100644
index 0000000..9cc7984
--- /dev/null
+++ b/lexers/go.lua
@@ -0,0 +1,78 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Go 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 = 'go'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local line_comment = '//' * l.nonnewline^0
+local block_comment = '/*' * (l.any - '*/')^0 * '*/'
+local comment = token(l.COMMENT, line_comment + block_comment)
+
+-- Strings.
+local sq_str = l.delimited_range("'", true)
+local dq_str = l.delimited_range('"', true)
+local raw_str = l.delimited_range('`', false, true)
+local string = token(l.STRING, sq_str + dq_str + raw_str)
+
+-- Numbers.
+local number = token(l.NUMBER, (l.float + l.integer) * P('i')^-1)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'break', 'case', 'chan', 'const', 'continue', 'default', 'defer', 'else',
+  'fallthrough', 'for', 'func', 'go', 'goto', 'if', 'import', 'interface',
+  'map', 'package', 'range', 'return', 'select', 'struct', 'switch', 'type',
+  'var'
+})
+
+-- Constants.
+local constant = token(l.CONSTANT, word_match{
+  'true', 'false', 'iota', 'nil'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'bool', 'byte', 'complex64', 'complex128', 'error', 'float32', 'float64',
+  'int', 'int8', 'int16', 'int32', 'int64', 'rune', 'string', 'uint', 'uint8',
+  'uint16', 'uint32', 'uint64', 'uintptr'
+})
+
+-- Functions.
+local func = token(l.FUNCTION, word_match{
+  'append', 'cap', 'close', 'complex', 'copy', 'delete', 'imag', 'len', 'make',
+  'new', 'panic', 'print', 'println', 'real', 'recover'
+})
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('+-*/%&|^<>=!:;.,()[]{}'))
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'constant', constant},
+  {'type', type},
+  {'function', func},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'operator', operator},
+}
+
+M._foldsymbols = {
+  _patterns = {'[{}]', '/%*', '%*/', '//'},
+  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
+  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
+}
+
+return M