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// Copyright (C) 2013, Gabriel Dos Reis.
// All rights reserved.
// Written by Gabriel Dos Reis.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
//
// - Neither the name of OpenAxiom. nor the names of its contributors
// may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef OPENAXIOM_TOKEN_included
#define OPENAXIOM_TOKEN_included
#include <stdint.h>
#include <open-axiom/Input>
namespace OpenAxiom {
namespace token {
// -- Underlying representation of a token class.
using class_type = uint32_t;
// -- 8-bit byte data type
using u8 = uint8_t;
// -- Number of bits per basic char value
constexpr auto char_bits = 8;
// -- Type of literal strings of given number of characters.
template<int N>
using text_chunk = const char(&)[N+1];
// -- Return the token value of certain literal strings.
constexpr class_type value(text_chunk<0>) { return u8(); }
constexpr class_type value(text_chunk<1> s) { return u8(s[0]); }
constexpr class_type value(text_chunk<2> s) {
return (u8(s[0]) << char_bits) | u8(s[0]);
}
constexpr class_type value(text_chunk<3> s) {
return (u8(s[0]) << (2 * char_bits))
| (u8(s[1]) << char_bits)
| u8(s[2]);
}
// -- Abstract values of tokens.
enum Value {
unknown_tv = value(""),
bar_tv = value("|"),
dot_tv = value("."),
dot_dot_tv = value(".."),
colon_tv = value(":"),
colon_colon_tv = value("::"),
colon_dash_tv = value(":-"),
colon_eq_tv = value(":="),
at_tv = value("@"),
comma_tv = value(","),
semicolon_tv = value(";"),
star_tv = value("*"),
plus_tv = value("+"),
minus_tv = value("-"),
slash_tv = value("/"),
backslash_tv = value("\\"),
slash_slash_tv = value("//"),
backslash_backslash_tv = value("\\\\"),
backslash_slash_tv = value("\\/"),
slash_backslash_tv = value("/\\"),
less_tv = value("<"),
less_eq_tv = value("<="),
greater_tv = value(">"),
greater_eq_tv = value(">="),
eq_tv = value("="),
eq_eq_tv = value("=="),
tilde_tv = value("~"),
tilde_eq_tv = value("~="),
caret_tv = value("^"),
pound_tv = value("#"),
dollar_tv = value("$"),
ampersand_tv = value("&"),
open_paren_tv = value("("),
close_paren_tv = value(")"),
open_bracket_tv = value("["),
close_bracket_tv = value("]"),
open_brace_tv = value("{"),
close_brace_tv = value("}"),
open_meta_paren_tv = value("(|"),
close_meta_paren_tv = value("|)"),
open_meta_bracket_tv = value("[|"),
close_meta_bracket_tv = value("|]"),
open_meta_brace_tv = value("{|"),
close_meta_brace_tv = value("|}"),
apostrophe_tv = value("'"),
backquote_tv = value("`"),
star_star_tv = value("**"),
implies_tv = value("=>"),
right_arrow_tv = value("->"),
left_arrow_tv = value("<-"),
open_chevron_tv = value("<<"),
close_chevron_tv = value(">>"),
fat_arrow_tv = value("==>"),
equiv_tv = value("<=>"),
mapsto_tv = value("+->"),
add_tv = value("add"),
and_tv = value("and"),
by_tv = value("by"),
do_tv = value("do"),
for_tv = value("for"),
has_tv = value("has"),
if_tv = value("if"),
in_tv = value("in"),
is_tv = value("is"),
mod_tv = value("mod"),
of_tv = value("of"), // -- Boot only
or_tv = value("or"),
quo_tv = value("quo"),
rem_tv = value("rem"),
try_tv = value("try"),
last_trigraph_tv = value("\xff\xff\xff"),
assume_tv, // "assume"
break_tv, // "break"
case_tv, // "case"
catch_tv, // "catch"
cross_tv, // "cross"
else_tv, // "else"
exist_tv, // "exist"
finally_tv, // "finally"
from_tv, // "from"
forall_tv, // "forall"
function_tv, // "function" -- Boot only
import_tv, // "import"
inline_tv, // "inline"
isnt_tv, // "isnt"
iterate_tv, // "iterate"
leave_tv, // "leave"
macro_tv, // "macro"
module_tv, // "module" -- Boot only
namespace_tv, // "namespace" -- Boot only
pretend_tv, // "pretend"
repeat_tv, // "repeat"
return_tv, // "return"
rule_tv, // "rule"
structure_tv, // "structure" -- Boot only
then_tv, // "then"
throw_tv, // "throw"
until_tv, // "until"
with_tv, // "with"
where_tv, // "where"
while_tv, // "while"
integer_literal_tv, // integer literal
string_literal_tv, // string literal
fp_literal_tv, // floating point literal
indent_tv, // new line indentation, greater than previous
unindent_tv, // new line indentation, less than previous
justify_tv, // align indentation with preceding line.
};
// -- Representation of a token
struct Rep {
Value value;
Input::Span span;
Input::Line line;
};
// -- Random access stream of tokens.
struct Stream : std::vector<Rep> {
Stream(Stream&&) = default;
Stream(const Stream&) = delete;
Stream& operator=(const Stream&) = delete;
};
// Inserting a token into a stream.
Stream& operator<<(Stream&, const Rep&);
}
}
#endif // OPENAXIOM_TOKEN_included
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