From 3570869c9ae2c4df14b15423789919e514322916 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Wed, 7 Dec 2016 16:49:29 +0100
Subject: Move all lua related files to lua/ subfolder

Also remove the lexers sub directory from the Lua search path.
As a result we attempt to open fewer files during startup:

 $ strace -e open -o log ./vis +q config.h && wc -l log

In order to avoid having to modifiy all lexers which `require('lexer')`
we instead place a symlink in the top level directory.

 $ ./configure --disable-lua
 $ rm -rf lua

Should result in a source tree with most lua specifc functionality
removed.
---
 lua/lexers/nemerle.lua | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 lua/lexers/nemerle.lua

(limited to 'lua/lexers/nemerle.lua')

diff --git a/lua/lexers/nemerle.lua b/lua/lexers/nemerle.lua
new file mode 100644
index 0000000..3bab7a7
--- /dev/null
+++ b/lua/lexers/nemerle.lua
@@ -0,0 +1,81 @@
+-- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Nemerle 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 = 'nemerle'}
+
+-- 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 = P('L')^-1 * l.delimited_range("'", true)
+local dq_str = P('L')^-1 * 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_word = word_match{
+  'define', 'elif', 'else', 'endif', 'endregion', 'error', 'if', 'ifdef',
+  'ifndef', 'line', 'pragma', 'region', 'undef', 'using', 'warning'
+}
+local preproc = token(l.PREPROCESSOR,
+                      l.starts_line('#') * S('\t ')^0 * preproc_word)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  '_', 'abstract', 'and', 'array', 'as', 'base', 'catch', 'class', 'def', 'do',
+  'else', 'extends', 'extern', 'finally', 'foreach', 'for',  'fun', 'if',
+  'implements', 'in', 'interface', 'internal', 'lock', 'macro', 'match',
+  'module', 'mutable', 'namespace', 'new', 'out', 'override', 'params',
+  'private', 'protected', 'public', 'ref', 'repeat', 'sealed', 'static',
+  'struct', 'syntax', 'this', 'throw', 'try', 'type', 'typeof', 'unless',
+  'until', 'using', 'variant', 'virtual', 'when', 'where', 'while',
+  -- Values.
+  'null', 'true', 'false'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'bool', 'byte', 'char', 'decimal', 'double', 'float', 'int', 'list', 'long',
+  'object', 'sbyte', 'short', 'string', 'uint', 'ulong', 'ushort', 'void'
+})
+
+-- 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
-- 
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