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/pike.lua | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 lua/lexers/pike.lua

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

diff --git a/lua/lexers/pike.lua b/lua/lexers/pike.lua
new file mode 100644
index 0000000..9367ea2
--- /dev/null
+++ b/lua/lexers/pike.lua
@@ -0,0 +1,70 @@
+-- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
+-- Pike 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 = 'pike'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^1)
+
+-- Comments.
+local line_comment = '//' * l.nonnewline_esc^0
+local nested_comment = l.nested_pair('/*', '*/')
+local comment = token(l.COMMENT, line_comment + nested_comment)
+
+-- Strings.
+local sq_str = l.delimited_range("'", true)
+local dq_str = l.delimited_range('"', true)
+local lit_str = '#' * l.delimited_range('"')
+local string = token(l.STRING, sq_str + dq_str + lit_str)
+
+-- Numbers.
+local number = token(l.NUMBER, (l.float + l.integer) * S('lLdDfF')^-1)
+
+-- Preprocessors.
+local preproc = token(l.PREPROCESSOR, l.starts_line('#') * l.nonnewline^0)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'break', 'case', 'catch', 'continue', 'default', 'do', 'else', 'for',
+  'foreach', 'gauge', 'if', 'lambda', 'return', 'sscanf', 'switch', 'while',
+  'import', 'inherit',
+  -- Type modifiers.
+  'constant', 'extern', 'final', 'inline', 'local', 'nomask', 'optional',
+  'private', 'protected', 'public', 'static', 'variant'
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'array', 'class', 'float', 'function', 'int', 'mapping', 'mixed', 'multiset',
+  'object', 'program', 'string', '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.OPERATOR] = {['{'] = 1, ['}'] = -1},
+  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
+}
+
+return M
-- 
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