/
identifier.d
210 lines (185 loc) · 5.23 KB
/
identifier.d
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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (c) 1999-2017 by Digital Mars, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/ddmd/identifier.d, _identifier.d)
*/
module ddmd.identifier;
// Online documentation: https://dlang.org/phobos/ddmd_identifier.html
import core.stdc.ctype;
import core.stdc.stdio;
import core.stdc.string;
import ddmd.globals;
import ddmd.id;
import ddmd.root.outbuffer;
import ddmd.root.rootobject;
import ddmd.root.stringtable;
import ddmd.tokens;
import ddmd.utf;
/***********************************************************
*/
extern (C++) final class Identifier : RootObject
{
private:
const int value;
const char* string;
const size_t len;
public:
extern (D) this(const(char)* string, size_t length, int value)
{
//printf("Identifier('%s', %d)\n", string, value);
this.string = string;
this.value = value;
this.len = length;
}
extern (D) this(const(char)* string)
{
//printf("Identifier('%s', %d)\n", string, value);
this(string, strlen(string), TOKidentifier);
}
static Identifier create(const(char)* string)
{
return new Identifier(string);
}
override bool equals(RootObject o) const
{
return this == o || strncmp(string, o.toChars(), len + 1) == 0;
}
override int compare(RootObject o) const
{
return strncmp(string, o.toChars(), len + 1);
}
override void print() const
{
fprintf(stderr, "%s", string);
}
override const(char)* toChars() const
{
return string;
}
extern (D) final const(char)[] toString() const
{
return string[0 .. len];
}
final int getValue() const
{
return value;
}
const(char)* toHChars2() const
{
const(char)* p = null;
if (this == Id.ctor)
p = "this";
else if (this == Id.dtor)
p = "~this";
else if (this == Id.unitTest)
p = "unittest";
else if (this == Id.dollar)
p = "$";
else if (this == Id.withSym)
p = "with";
else if (this == Id.result)
p = "result";
else if (this == Id.returnLabel)
p = "return";
else
{
p = toChars();
if (*p == '_')
{
if (strncmp(p, "_staticCtor", 11) == 0)
p = "static this";
else if (strncmp(p, "_staticDtor", 11) == 0)
p = "static ~this";
else if (strncmp(p, "__invariant", 11) == 0)
p = "invariant";
}
}
return p;
}
override DYNCAST dyncast() const
{
return DYNCAST.identifier;
}
extern (C++) static __gshared StringTable stringtable;
static Identifier generateId(const(char)* prefix)
{
static __gshared size_t i;
return generateId(prefix, ++i);
}
static Identifier generateId(const(char)* prefix, size_t i)
{
OutBuffer buf;
buf.writestring(prefix);
buf.printf("%llu", cast(ulong)i);
return idPool(buf.peekSlice());
}
/********************************************
* Create an identifier in the string table.
*/
extern (D) static Identifier idPool(const(char)[] s)
{
return idPool(s.ptr, s.length);
}
static Identifier idPool(const(char)* s, size_t len)
{
StringValue* sv = stringtable.update(s, len);
Identifier id = cast(Identifier)sv.ptrvalue;
if (!id)
{
id = new Identifier(sv.toDchars(), len, TOKidentifier);
sv.ptrvalue = cast(char*)id;
}
return id;
}
extern (D) static Identifier idPool(const(char)* s, size_t len, int value)
{
auto sv = stringtable.insert(s, len, null);
assert(sv);
auto id = new Identifier(sv.toDchars(), len, value);
sv.ptrvalue = cast(char*)id;
return id;
}
/**********************************
* Determine if string is a valid Identifier.
* Returns:
* 0 invalid
*/
static bool isValidIdentifier(const(char)* p)
{
size_t len;
size_t idx;
if (!p || !*p)
goto Linvalid;
if (*p >= '0' && *p <= '9') // beware of isdigit() on signed chars
goto Linvalid;
len = strlen(p);
idx = 0;
while (p[idx])
{
dchar dc;
const q = utf_decodeChar(p, len, idx, dc);
if (q)
goto Linvalid;
if (!((dc >= 0x80 && isUniAlpha(dc)) || isalnum(dc) || dc == '_'))
goto Linvalid;
}
return true;
Linvalid:
return false;
}
static Identifier lookup(const(char)* s, size_t len)
{
auto sv = stringtable.lookup(s, len);
if (!sv)
return null;
return cast(Identifier)sv.ptrvalue;
}
static void initTable()
{
stringtable._init(28000);
}
}