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, 83 deletions

diff --git a/lexers/caml.lua b/lexers/caml.lua
deleted file mode 100644
index be0f241..0000000
--- a/lexers/caml.lua
+++ /dev/null
@@ -1,83 +0,0 @@
--- Copyright 2006-2016 Mitchell mitchell.att.foicica.com. See LICENSE.
--- OCaml 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 = 'caml'}
-
--- Whitespace.
-local ws = token(l.WHITESPACE, l.space^1)
-
--- Comments.
-local comment = token(l.COMMENT, l.nested_pair('(*', '*)'))
-
--- 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)
-
--- Keywords.
-local keyword = token(l.KEYWORD, word_match{
-  'and', 'as', 'asr', 'begin', 'class', 'closed', 'constraint', 'do', 'done',
-  'downto', 'else', 'end', 'exception', 'external', 'failwith', 'false',
-  'flush', 'for', 'fun', 'function', 'functor', 'if', 'in', 'include',
-  'inherit',  'incr', 'land', 'let', 'load', 'los', 'lsl', 'lsr', 'lxor',
-  'match', 'method', 'mod', 'module', 'mutable', 'new', 'not', 'of', 'open',
-  'option', 'or', 'parser', 'private', 'ref', 'rec', 'raise', 'regexp', 'sig',
-  'struct', 'stdout', 'stdin', 'stderr', 'then', 'to', 'true', 'try', 'type',
-  'val', 'virtual', 'when', 'while', 'with'
-})
-
--- Types.
-local type = token(l.TYPE, word_match{
-  'int', 'float', 'bool', 'char', 'string', 'unit'
-})
-
--- Functions.
-local func = token(l.FUNCTION, word_match{
-  'raise', 'invalid_arg', 'failwith', 'compare', 'min', 'max', 'succ', 'pred',
-  'mod', 'abs', 'max_int', 'min_int', 'sqrt', 'exp', 'log', 'log10', 'cos',
-  'sin', 'tan', 'acos', 'asin', 'atan', 'atan2', 'cosh', 'sinh', 'tanh', 'ceil',
-  'floor', 'abs_float', 'mod_float', 'frexp', 'ldexp', 'modf', 'float',
-  'float_of_int', 'truncate', 'int_of_float', 'infinity', 'nan', 'max_float',
-  'min_float', 'epsilon_float', 'classify_float', 'int_of_char', 'char_of_int',
-  'ignore', 'string_of_bool', 'bool_of_string', 'string_of_int',
-  'int_of_string', 'string_of_float', 'float_of_string', 'fst', 'snd', 'stdin',
-  'stdout', 'stderr', 'print_char', 'print_string', 'print_int', 'print_float',
-  'print_endline', 'print_newline', 'prerr_char', 'prerr_string', 'prerr_int',
-  'prerr_float', 'prerr_endline', 'prerr_newline', 'read_line', 'read_int',
-  'read_float', 'open_out', 'open_out_bin', 'open_out_gen', 'flush',
-  'flush_all', 'output_char', 'output_string', 'output', 'output_byte',
-  'output_binary_int', 'output_value', 'seek_out', 'pos_out',
-  'out_channel_length', 'close_out', 'close_out_noerr', 'set_binary_mode_out',
-  'open_in', 'open_in_bin', 'open_in_gen', 'input_char', 'input_line', 'input',
-  'really_input', 'input_byte', 'input_binary_int', 'input_value', 'seek_in',
-  'pos_in', 'in_channel_length', 'close_in', 'close_in_noerr',
-  'set_binary_mode_in', 'incr', 'decr', 'string_of_format', 'format_of_string',
-  'exit', 'at_exit'
-})
-
--- Identifiers.
-local identifier = token(l.IDENTIFIER, l.word)
-
--- Operators.
-local operator = token(l.OPERATOR, S('=<>+-*/.,:;~!#%^&|?[](){}'))
-
-M._rules = {
-  {'whitespace', ws},
-  {'keyword', keyword},
-  {'type', type},
-  {'function', func},
-  {'identifier', identifier},
-  {'string', string},
-  {'comment', comment},
-  {'number', number},
-  {'operator', operator},
-}
-
-return M