Added optional Lua lexer support.

This support is disabled by default and must be enabled via compile-time option.

1 files changed, 62 insertions, 0 deletions

diff --git a/lexlua/caml.lua b/lexlua/caml.lua
new file mode 100644
index 000000000..10e308af0
--- /dev/null
+++ b/lexlua/caml.lua
@@ -0,0 +1,62 @@
+-- Copyright 2006-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- OCaml LPeg lexer.
+
+local lexer = require('lexer')
+local token, word_match = lexer.token, lexer.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local lex = lexer.new('caml')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.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 incr
+  inherit land let load los lsl lsr lxor match method mod module mutable new not
+  of open option or parser private raise rec ref regexp sig stderr stdin stdout
+  struct then to true try type val virtual when while with
+]]))
+
+-- Types.
+lex:add_rule('type', token(lexer.TYPE, word_match[[
+  bool char float int string unit
+]]))
+
+-- Functions.
+lex:add_rule('function', token(lexer.FUNCTION, word_match[[
+  abs abs_float acos asin atan atan2 at_exit bool_of_string ceil char_of_int
+  classify_float close_in close_in_noerr close_out close_out_noerr compare cos
+  cosh decr epsilon_float exit exp failwith float float_of_int float_of_string
+  floor flush flush_all format_of_string frexp fst ignore in_channel_length incr
+  infinity input input_binary_int input_byte input_char input_line input_value
+  int_of_char int_of_float int_of_string invalid_arg ldexp log log10 max
+  max_float max_int min min_float min_int mod modf mod_float nan open_in
+  open_in_bin open_in_gen open_out open_out_bin open_out_gen out_channel_length
+  output output_binary_int output_byte output_char output_string output_value
+  pos_in pos_out pred prerr_char prerr_endline prerr_float prerr_int
+  prerr_newline prerr_string print_char print_endline print_float print_int
+  print_newline print_string raise read_float read_int read_line really_input
+  seek_in seek_out set_binary_mode_in set_binary_mode_out sin sinh snd sqrt
+  stderr stdin stdout string_of_bool string_of_float string_of_format
+  string_of_int succ tan tanh truncate
+]]))
+
+-- Identifiers.
+lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING, lexer.delimited_range("'", true) +
+                                           lexer.delimited_range('"', true)))
+
+-- Comments.
+lex:add_rule('comment', token(lexer.COMMENT, lexer.nested_pair('(*', '*)')))
+
+-- Numbers.
+lex:add_rule('number', token(lexer.NUMBER, lexer.float + lexer.integer))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('=<>+-*/.,:;~!#%^&|?[](){}')))
+
+return lex