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
|
/**
* A scoped C++ namespace symbol
*
* D supports the following syntax to declare symbol(s) as being part of a
* C++ namespace:
* ---
* extern (C++, "myNamespace") { /+ Symbols +/ } // String variant
* extern (C++, SomeNamespace) { /+ Other symbols +/ } // Identifier variant
* ---
* The first form is an attribute and only affects mangling, and is implemented
* in `dmd.attrib`.
* The second form introduces a named scope and allows symbols to be refered
* to with or without the namespace name, much like a named template mixin,
* and is implemented in this module.
* ---
* extern (C++, Basket)
* {
* struct StrawBerry;
* void swapFood (Strawberry* f1, Strawberry* f2);
* }
* void main ()
* {
* Basket.StrawBerry fruit1;
* StrawBerry fruit2;
* Basket.swapFood(fruit1, fruit2);
* swapFood(fruit1, fruit2);
* }
* ---
* Hence the `Nspace` symbol implements the usual `ScopeDsymbol` semantics.
*
* Note that it implies `extern(C++)` so it cannot be used as a generic
* named scope. Additionally, `Nspace` with the same `Identifier` can be
* defined in different module (as C++ allows a namespace to be spread accross
* translation units), but symbols in it should be considered
* part of the same scope. Lastly, not all possible C++ namespace names
* are valid D identifier.
*
* See_Also: https://github.com/dlang/dmd/pull/10031
* Copyright: Copyright (C) 1999-2023 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 https://www.digitalmars.com, Walter Bright)
* License: $(LINK2 https://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/nspace.d, _nspace.d)
* Documentation: https://dlang.org/phobos/dmd_nspace.html
* Coverage: https://codecov.io/gh/dlang/dmd/src/master/src/dmd/nspace.d
*/
module dmd.nspace;
import dmd.aggregate;
import dmd.arraytypes;
import dmd.astenums;
import dmd.dscope;
import dmd.dsymbol;
import dmd.dsymbolsem;
import dmd.expression;
import dmd.globals;
import dmd.identifier;
import dmd.location;
import dmd.visitor;
import core.stdc.stdio;
private enum LOG = false;
/// Ditto
extern (C++) final class Nspace : ScopeDsymbol
{
/**
* Namespace identifier resolved during semantic.
*/
Expression identExp;
extern (D) this(const ref Loc loc, Identifier ident, Expression identExp, Dsymbols* members)
{
super(loc, ident);
//printf("Nspace::Nspace(ident = %s)\n", ident.toChars());
this.members = members;
this.identExp = identExp;
}
override Nspace syntaxCopy(Dsymbol s)
{
auto ns = new Nspace(loc, ident, identExp, null);
ScopeDsymbol.syntaxCopy(ns);
return ns;
}
override void addMember(Scope* sc, ScopeDsymbol sds)
{
ScopeDsymbol.addMember(sc, sds);
if (members)
{
if (!symtab)
symtab = new DsymbolTable();
// The namespace becomes 'imported' into the enclosing scope
for (Scope* sce = sc; 1; sce = sce.enclosing)
{
ScopeDsymbol sds2 = sce.scopesym;
if (sds2)
{
sds2.importScope(this, Visibility(Visibility.Kind.public_));
break;
}
}
assert(sc);
sc = sc.push(this);
sc.linkage = LINK.cpp; // namespaces default to C++ linkage
sc.parent = this;
members.foreachDsymbol(s => s.addMember(sc, this));
sc.pop();
}
}
override void setScope(Scope* sc)
{
ScopeDsymbol.setScope(sc);
if (members)
{
assert(sc);
sc = sc.push(this);
sc.linkage = LINK.cpp; // namespaces default to C++ linkage
sc.parent = this;
members.foreachDsymbol(s => s.setScope(sc));
sc.pop();
}
}
override Dsymbol search(const ref Loc loc, Identifier ident, int flags = SearchLocalsOnly)
{
//printf("%s.Nspace.search('%s')\n", toChars(), ident.toChars());
if (_scope && !symtab)
dsymbolSemantic(this, _scope);
if (!members || !symtab) // opaque or semantic() is not yet called
{
if (!(flags & IgnoreErrors))
error("is forward referenced when looking for `%s`", ident.toChars());
return null;
}
return ScopeDsymbol.search(loc, ident, flags);
}
override bool hasPointers()
{
//printf("Nspace::hasPointers() %s\n", toChars());
return members.foreachDsymbol( (s) { return s.hasPointers(); } ) != 0;
}
override void setFieldOffset(AggregateDeclaration ad, ref FieldState fieldState, bool isunion)
{
//printf("Nspace::setFieldOffset() %s\n", toChars());
if (_scope) // if fwd reference
dsymbolSemantic(this, null); // try to resolve it
members.foreachDsymbol( s => s.setFieldOffset(ad, fieldState, isunion) );
}
override const(char)* kind() const
{
return "namespace";
}
override inout(Nspace) isNspace() inout
{
return this;
}
override void accept(Visitor v)
{
v.visit(this);
}
}
|
