Import LPeg based lexers from Scintillua 3.6.1-1

These are Copyright (c) 2007-2015 Mitchell and released under the
MIT license.

1 files changed, 44 insertions, 0 deletions

diff --git a/lexers/diff.lua b/lexers/diff.lua
new file mode 100644
index 0000000..53b7f17
--- /dev/null
+++ b/lexers/diff.lua
@@ -0,0 +1,44 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Diff 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 = 'diff'}
+
+-- Text, separators, and file headers.
+local index = token(l.COMMENT, 'Index: ' * l.any^0 * P(-1))
+local separator = token(l.COMMENT, ('---' + P('*')^4 + P('=')^1) * l.space^0 *
+                                   -1)
+local header = token('header', (P('*** ') + '--- ' + '+++ ') * l.any^1)
+
+-- Location.
+local location = token(l.NUMBER, ('@@' + l.digit^1 + '****') * l.any^1)
+
+-- Additions, deletions, and changes.
+local addition = token('addition', S('>+') * l.any^0)
+local deletion = token('deletion', S('<-') * l.any^0)
+local change   = token('change', '! ' * l.any^0)
+
+M._rules = {
+  {'index', index},
+  {'separator', separator},
+  {'header', header},
+  {'location', location},
+  {'addition', addition},
+  {'deletion', deletion},
+  {'change', change},
+  {'any_line', token('default', l.any^1)},
+}
+
+M._tokenstyles = {
+  header = l.STYLE_COMMENT,
+  addition = 'fore:$(color.green)',
+  deletion = 'fore:$(color.red)',
+  change = 'fore:$(color.yellow)'
+}
+
+M._LEXBYLINE = true
+
+return M