1 files changed, 97 insertions, 0 deletions
diff --git a/lexers/rexx.lua b/lexers/rexx.lua
new file mode 100644
index 0000000..6e13dd3
--- /dev/null
+++ b/lexers/rexx.lua
@@ -0,0 +1,97 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Rexx 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 = 'rexx'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local line_comment = '--' * l.nonnewline_esc^0
+local block_comment = l.nested_pair('/*', '*/')
+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 string = token(l.STRING, sq_str + dq_str)
+
+-- Numbers.
+local number = token(l.NUMBER, l.float + l.integer)
+
+-- Preprocessor.
+local preproc = token(l.PREPROCESSOR, l.starts_line('#') * l.nonnewline^0)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match({
+  'address', 'arg', 'by', 'call', 'class', 'do', 'drop', 'else', 'end', 'exit',
+  'expose', 'forever', 'forward', 'guard', 'if', 'interpret', 'iterate',
+  'leave', 'method', 'nop', 'numeric', 'otherwise', 'parse', 'procedure',
+  'pull', 'push', 'queue', 'raise', 'reply', 'requires', 'return', 'routine',
+  'result', 'rc', 'say', 'select', 'self', 'sigl', 'signal', 'super', 'then',
+  'to', 'trace', 'use', 'when', 'while', 'until'
+}, nil, true))
+
+-- Functions.
+local func = token(l.FUNCTION, word_match({
+  'abbrev', 'abs', 'address', 'arg', 'beep', 'bitand', 'bitor', 'bitxor', 'b2x',
+  'center', 'changestr', 'charin', 'charout', 'chars', 'compare', 'consition',
+  'copies', 'countstr', 'c2d', 'c2x', 'datatype', 'date', 'delstr', 'delword',
+  'digits', 'directory', 'd2c', 'd2x', 'errortext', 'filespec', 'form',
+  'format', 'fuzz', 'insert', 'lastpos', 'left', 'length', 'linein', 'lineout',
+  'lines', 'max', 'min', 'overlay', 'pos', 'queued', 'random', 'reverse',
+  'right', 'sign', 'sourceline', 'space', 'stream', 'strip', 'substr',
+  'subword', 'symbol', 'time', 'trace', 'translate', 'trunc', 'value', 'var',
+  'verify', 'word', 'wordindex', 'wordlength', 'wordpos', 'words', 'xrange',
+  'x2b', 'x2c', 'x2d', 'rxfuncadd', 'rxfuncdrop', 'rxfuncquery', 'rxmessagebox',
+  'rxwinexec', 'sysaddrexxmacro', 'sysbootdrive', 'sysclearrexxmacrospace',
+  'syscloseeventsem', 'sysclosemutexsem', 'syscls', 'syscreateeventsem',
+  'syscreatemutexsem', 'syscurpos', 'syscurstate', 'sysdriveinfo',
+  'sysdrivemap', 'sysdropfuncs', 'sysdroprexxmacro', 'sysdumpvariables',
+  'sysfiledelete', 'sysfilesearch', 'sysfilesystemtype', 'sysfiletree',
+  'sysfromunicode', 'systounicode', 'sysgeterrortext', 'sysgetfiledatetime',
+  'sysgetkey', 'sysini', 'sysloadfuncs', 'sysloadrexxmacrospace', 'sysmkdir',
+  'sysopeneventsem', 'sysopenmutexsem', 'sysposteventsem', 'syspulseeventsem',
+  'sysqueryprocess', 'sysqueryrexxmacro', 'sysreleasemutexsem',
+  'sysreorderrexxmacro', 'sysrequestmutexsem', 'sysreseteventsem', 'sysrmdir',
+  'syssaverexxmacrospace', 'syssearchpath', 'syssetfiledatetime',
+  'syssetpriority', 'syssleep', 'sysstemcopy', 'sysstemdelete', 'syssteminsert',
+  'sysstemsort', 'sysswitchsession', 'syssystemdirectory', 'systempfilename',
+  'systextscreenread', 'systextscreensize', 'sysutilversion', 'sysversion',
+  'sysvolumelabel', 'syswaiteventsem', 'syswaitnamedpipe', 'syswindecryptfile',
+  'syswinencryptfile', 'syswinver'
+}, '2', true))
+
+-- Identifiers.
+local word = l.alpha * (l.alnum + S('@#$\\.!?_')^0)
+local identifier = token(l.IDENTIFIER, word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('=!<>+-/\\*%&|^~.,:;(){}'))
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'function', func},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'preproc', preproc},
+  {'operator', operator},
+}
+
+M._foldsymbols = {
+  _patterns = {'[a-z]+', '/%*', '%*/', '%-%-', ':'},
+  [l.KEYWORD] = {['do'] = 1, select = 1, ['end'] = -1, ['return'] = -1},
+  [l.COMMENT] = {
+    ['/*'] = 1, ['*/'] = -1, ['--'] = l.fold_line_comments('--')
+  },
+  [l.OPERATOR] = {[':'] = 1}
+}
+
+return M