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.

1 files changed, 0 insertions, 75 deletions

diff --git a/lexers/vala.lua b/lexers/vala.lua
deleted file mode 100644
index 46f074c..0000000
--- a/lexers/vala.lua
+++ /dev/null
@@ -1,75 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- Vala 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 = 'vala'}
-
--- 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 tq_str = '"""' * (l.any - '"""')^0 * P('"""')^-1
-local ml_str = '@' * l.delimited_range('"', false, true)
-local string = token(l.STRING, tq_str + sq_str + dq_str + ml_str)
-
--- Numbers.
-local number = token(l.NUMBER, (l.float + l.integer) * S('uUlLfFdDmM')^-1)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'class', 'delegate', 'enum', 'errordomain', 'interface', 'namespace',
-  'signal', 'struct', 'using',
-  -- Modifiers.
-  'abstract', 'const', 'dynamic', 'extern', 'inline', 'out', 'override',
-  'private', 'protected', 'public', 'ref', 'static', 'virtual', 'volatile',
-  'weak',
-  -- Other.
-  'as', 'base', 'break', 'case', 'catch', 'construct', 'continue', 'default',
-  'delete', 'do', 'else', 'ensures', 'finally', 'for', 'foreach', 'get', 'if',
-  'in', 'is', 'lock', 'new', 'requires', 'return', 'set', 'sizeof', 'switch',
-  'this', 'throw', 'throws', 'try', 'typeof', 'value', 'var', 'void', 'while',
-  -- Etc.
-  'null', 'true', 'false'
-})
-
--- Types.
-local type = token(l.TYPE, word_match{
-  'bool', 'char', 'double', 'float', 'int', 'int8', 'int16', 'int32', 'int64',
-  'long', 'short', 'size_t', 'ssize_t', 'string', 'uchar', 'uint', 'uint8',
-  'uint16', 'uint32', 'uint64', 'ulong', 'unichar', '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},
-  {'operator', operator},
-}
-
-M._foldsymbols = {
-  _patterns = {'[{}]', '/%*', '%*/', '//'},
-  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
-  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
-}
-
-return M