blob: ebb2b934203036188eff08c778eb0f37f05563e9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// SDLang-D
// Written in the D programming language.
module sdlang.symbol;
import std.algorithm;
static immutable validSymbolNames = [
"Error",
"EOF",
"EOL",
":",
"=",
"{",
"}",
"Ident",
"Value",
];
/// Use this to create a Symbol. Ex: symbol!"Value" or symbol!"="
/// Invalid names (such as symbol!"FooBar") are rejected at compile-time.
template symbol(string name)
{
static assert(validSymbolNames.find(name), "Invalid Symbol: '"~name~"'");
immutable symbol = _symbol(name);
}
private Symbol _symbol(string name)
{
return Symbol(name);
}
/// Symbol is essentially the "type" of a Token.
/// Token is like an instance of a Symbol.
///
/// This only represents terminals. Nonterminal tokens aren't
/// constructed since the AST is built directly during parsing.
///
/// You can't create a Symbol directly. Instead, use the `symbol`
/// template.
struct Symbol
{
private string _name;
@property string name()
{
return _name;
}
@disable this();
private this(string name)
{
this._name = name;
}
string toString()
{
return _name;
}
}
|
