From 039042f2e323c1f982f1de61b702c88fb33d6ccb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Fri, 16 Oct 2015 12:36:47 +0200
Subject: Import LPeg based lexers from Scintillua 3.6.1-1

These are Copyright (c) 2007-2015 Mitchell and released under the
MIT license.
---
 lexers/rstats.lua | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 lexers/rstats.lua

(limited to 'lexers/rstats.lua')

diff --git a/lexers/rstats.lua b/lexers/rstats.lua
new file mode 100644
index 0000000..a17bac0
--- /dev/null
+++ b/lexers/rstats.lua
@@ -0,0 +1,53 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- R 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 = 'rstats'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local comment = token(l.COMMENT, '#' * l.nonnewline^0)
+
+-- 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) * P('i')^-1)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'break', 'else', 'for', 'if', 'in', 'next', 'repeat', 'return', 'switch',
+  'try', 'while', 'Inf', 'NA', 'NaN', 'NULL', 'FALSE', 'TRUE'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'array', 'character', 'complex', 'data.frame', 'double', 'factor', 'function',
+  'integer', 'list', 'logical', 'matrix', 'numeric', 'vector'
+})
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('<->+*/^=.,:;|$()[]{}'))
+
+M._rules = {
+  {'whitespace', ws},
+  {'keyword', keyword},
+  {'type', type},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'operator', operator},
+}
+
+return M
-- 
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