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, 84 insertions, 0 deletions

diff --git a/lexers/csharp.lua b/lexers/csharp.lua
new file mode 100644
index 0000000..6f7ab79
--- /dev/null
+++ b/lexers/csharp.lua
@@ -0,0 +1,84 @@
+-- Copyright 2006-2015 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- C# 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 = 'csharp'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local line_comment = '//' * l.nonnewline_esc^0
+local block_comment = '/*' * (l.any - '*/')^0 * P('*/')^-1
+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 ml_str = P('@')^-1 * l.delimited_range('"', false, true)
+local string = token(l.STRING, sq_str + dq_str + ml_str)
+
+-- Numbers.
+local number = token(l.NUMBER, (l.float + l.integer) * S('lLdDfFMm')^-1)
+
+-- Preprocessor.
+local preproc_word = word_match{
+  'define', 'elif', 'else', 'endif', 'error', 'if', 'line', 'undef', 'warning',
+  'region', 'endregion'
+}
+local preproc = token(l.PREPROCESSOR,
+                      l.starts_line('#') * S('\t ')^0 * preproc_word *
+                      (l.nonnewline_esc^1 + l.space * l.nonnewline_esc^0))
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'class', 'delegate', 'enum', 'event', 'interface', 'namespace', 'struct',
+  'using', 'abstract', 'const', 'explicit', 'extern', 'fixed', 'implicit',
+  'internal', 'lock', 'out', 'override', 'params', 'partial', 'private',
+  'protected', 'public', 'ref', 'sealed', 'static', 'readonly', 'unsafe',
+  'virtual', 'volatile', 'add', 'as', 'assembly', 'base', 'break', 'case',
+  'catch', 'checked', 'continue', 'default', 'do', 'else', 'finally', 'for',
+  'foreach', 'get', 'goto', 'if', 'in', 'is', 'new', 'remove', 'return', 'set',
+  'sizeof', 'stackalloc', 'super', 'switch', 'this', 'throw', 'try', 'typeof',
+  'unchecked', 'value', 'void', 'while', 'yield',
+  'null', 'true', 'false'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'bool', 'byte', 'char', 'decimal', 'double', 'float', 'int', 'long', 'object',
+  'operator', 'sbyte', 'short', 'string', 'uint', 'ulong', 'ushort'
+})
+
+-- 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},
+  {'preproc', preproc},
+  {'operator', operator},
+}
+
+M._foldsymbols = {
+  _patterns = {'%l+', '[{}]', '/%*', '%*/', '//'},
+  [l.PREPROCESSOR] = {
+    region = 1, endregion = -1,
+    ['if'] = 1, ifdef = 1, ifndef = 1, endif = -1
+  },
+  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
+  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
+}
+
+return M