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, 76 deletions

diff --git a/lexers/fsharp.lua b/lexers/fsharp.lua
deleted file mode 100644
index 383ab6a..0000000
--- a/lexers/fsharp.lua
+++ /dev/null
@@ -1,76 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- F# 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 = 'fsharp'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local line_comment = P('//') * l.nonnewline^0
-local block_comment = l.nested_pair('(*', '*)')
-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 string = token(l.STRING, sq_str + dq_str)
-
--- Numbers.
-local number = token(l.NUMBER, (l.float + l.integer * S('uUlL')^-1))
-
--- Preprocessor.
-local preproc_word = word_match{
-  'ifndef', 'ifdef', 'if', 'else', 'endif', 'light', '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{
-  'abstract', 'and', 'as', 'assert', 'asr', 'begin', 'class', 'default',
-  'delegate', 'do', 'done', 'downcast', 'downto', 'else', 'end', 'enum',
-  'exception', 'false', 'finaly', 'for', 'fun', 'function', 'if', 'in',
-  'iherit', 'interface', 'land', 'lazy', 'let', 'lor', 'lsl', 'lsr', 'lxor',
-  'match', 'member', 'mod', 'module', 'mutable', 'namespace', 'new', 'null',
-  'of', 'open', 'or', 'override', 'sig', 'static', 'struct', 'then', 'to',
-  'true', 'try', 'type', 'val', 'when', 'inline', 'upcast', 'while', 'with',
-  'async', 'atomic', 'break', 'checked', 'component', 'const', 'constructor',
-  'continue', 'eager', 'event', 'external', 'fixed', 'functor', 'include',
-  'method', 'mixin', 'process', 'property', 'protected', 'public', 'pure',
-  'readonly', 'return', 'sealed', 'switch', 'virtual', 'void', 'volatile',
-  'where',
-  -- Booleans.
-  'true', 'false'
-})
-
--- Types.
-local type = token(l.TYPE, word_match{
-  'bool', 'byte', 'sbyte', 'int16', 'uint16', 'int', 'uint32', 'int64',
-  'uint64', 'nativeint', 'unativeint', 'char', 'string', 'decimal', 'unit',
-  'void', 'float32', 'single', 'float', 'double'
-})
-
--- 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},
-}
-
-return M