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
|
// Copyright (C) 2020-2025 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include "rust-ast-validation.h"
#include "rust-common.h"
#include "rust-diagnostics.h"
#include "rust-item.h"
#include "rust-keyword-values.h"
namespace Rust {
void
ASTValidation::visit (AST::Lifetime &lifetime)
{
auto name = lifetime.get_lifetime_name ();
auto valid = std::set<std::string>{"static", "_"};
auto &keywords = Values::Keywords::keywords;
if (valid.find (name) == valid.end ()
&& keywords.find (name) != keywords.end ())
rust_error_at (lifetime.get_locus (), "lifetimes cannot use keyword names");
AST::ContextualASTVisitor::visit (lifetime);
}
void
ASTValidation::visit (AST::LoopLabel &label)
{
auto name = label.get_lifetime ().get_lifetime_name ();
auto lifetime_name = '\'' + name;
auto &keywords = Values::Keywords::keywords;
if (keywords.find (name) != keywords.end ())
rust_error_at (label.get_lifetime ().get_locus (), "invalid label name %qs",
lifetime_name.c_str ());
// WARNING: Do not call ContextualASTVisitor, we don't want to visit the
// lifetime
// Maybe we should refactor LoopLabel instead ?
}
void
ASTValidation::visit (AST::ConstantItem &const_item)
{
if (!const_item.has_expr () && context.back () != Context::TRAIT_IMPL)
{
rust_error_at (const_item.get_locus (),
"associated constant in %<impl%> without body");
}
AST::ContextualASTVisitor::visit (const_item);
}
void
ASTValidation::visit (AST::Union &item)
{
if (item.get_variants ().empty ())
rust_error_at (item.get_locus (), "unions cannot have zero fields");
AST::ContextualASTVisitor::visit (item);
}
void
ASTValidation::visit (AST::Function &function)
{
const auto &qualifiers = function.get_qualifiers ();
if (qualifiers.is_async () && qualifiers.is_const ())
rust_error_at (function.get_locus (),
"functions cannot be both %<const%> and %<async%>");
if (qualifiers.is_const ()
&& (context.back () == Context::TRAIT_IMPL
|| context.back () == Context::TRAIT))
rust_error_at (function.get_locus (), ErrorCode::E0379,
"functions in traits cannot be declared %<const%>");
// may change soon
if (qualifiers.is_async ()
&& (context.back () == Context::TRAIT_IMPL
|| context.back () == Context::TRAIT))
rust_error_at (function.get_locus (), ErrorCode::E0706,
"functions in traits cannot be declared %<async%>");
// if not an associated function but has a self parameter
if (context.back () != Context::TRAIT
&& context.back () != Context::TRAIT_IMPL
&& context.back () != Context::INHERENT_IMPL
&& function.has_self_param ())
rust_error_at (
function.get_self_param ().get_locus (),
"%<self%> parameter is only allowed in associated functions");
if (function.is_external ())
{
if (function.has_body ())
rust_error_at (function.get_locus (), "cannot have a body");
auto ¶ms = function.get_function_params ();
if (params.size () == 1 && function.is_variadic ())
rust_error_at (function.get_locus (),
"C-variadic function must be declared with at least one "
"named argument");
for (auto it = params.begin (); it != params.end (); it++)
{
if (it->get ()->is_variadic () && it + 1 != params.end ())
rust_error_at (
it->get ()->get_locus (),
"%<...%> must be the last argument of a C-variadic function");
// if functional parameter
if (!it->get ()->is_self () && !it->get ()->is_variadic ())
{
auto ¶m = static_cast<AST::FunctionParam &> (**it);
auto kind = param.get_pattern ().get_pattern_kind ();
if (kind != AST::Pattern::Kind::Identifier
&& kind != AST::Pattern::Kind::Wildcard)
rust_error_at (it->get ()->get_locus (), ErrorCode::E0130,
"pattern not allowed in foreign function");
}
}
}
else
{
if (!function.has_body ())
{
if (context.back () == Context::INHERENT_IMPL
|| context.back () == Context::TRAIT_IMPL)
rust_error_at (function.get_locus (),
"associated function in %<impl%> without body");
else if (context.back () != Context::TRAIT)
rust_error_at (function.get_locus (),
"free function without a body");
}
auto &function_params = function.get_function_params ();
for (auto it = function_params.begin (); it != function_params.end ();
it++)
{
if (it->get ()->is_variadic ())
rust_error_at (
it->get ()->get_locus (),
"only foreign or %<unsafe extern \"C\"%> functions may "
"be C-variadic");
}
}
AST::ContextualASTVisitor::visit (function);
}
void
ASTValidation::visit (AST::Trait &trait)
{
if (trait.is_auto ())
{
if (trait.has_generics ())
rust_error_at (trait.get_generic_params ()[0]->get_locus (),
ErrorCode::E0567,
"auto traits cannot have generic parameters");
if (trait.has_type_param_bounds ())
rust_error_at (trait.get_type_param_bounds ()[0]->get_locus (),
ErrorCode::E0568,
"auto traits cannot have super traits");
if (trait.has_trait_items ())
{
rust_error_at (trait.get_identifier ().get_locus (), ErrorCode::E0380,
"auto traits cannot have methods or associated items");
for (const auto &item : trait.get_trait_items ())
Error::Hint (item->get_locus (), "remove this item").emit ();
}
}
AST::ContextualASTVisitor::visit (trait);
}
void
ASTValidation::visit (AST::Module &module)
{
if (module.get_unsafety () == Unsafety::Unsafe)
rust_error_at (module.get_locus (), "module cannot be declared unsafe");
AST::ContextualASTVisitor::visit (module);
}
} // namespace Rust
|
