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
|
// Copyright (C) 2020-2022 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/>.
#ifndef RUST_COMPILE_STMT
#define RUST_COMPILE_STMT
#include "rust-compile-base.h"
#include "rust-compile-tyty.h"
#include "rust-compile-expr.h"
namespace Rust {
namespace Compile {
class CompileStmt : public HIRCompileBase, public HIR::HIRStmtVisitor
{
public:
static tree Compile (HIR::Stmt *stmt, Context *ctx)
{
CompileStmt compiler (ctx);
stmt->accept_vis (compiler);
return compiler.translated;
}
void visit (HIR::ExprStmtWithBlock &stmt) override
{
translated = CompileExpr::Compile (stmt.get_expr (), ctx);
}
void visit (HIR::ExprStmtWithoutBlock &stmt) override
{
translated = CompileExpr::Compile (stmt.get_expr (), ctx);
}
void visit (HIR::LetStmt &stmt) override
{
// nothing to do
if (!stmt.has_init_expr ())
return;
TyTy::BaseType *ty = nullptr;
if (!ctx->get_tyctx ()->lookup_type (stmt.get_mappings ().get_hirid (),
&ty))
{
// FIXME this should be an assertion instead
rust_fatal_error (stmt.get_locus (),
"failed to lookup variable declaration type");
return;
}
Bvariable *var = nullptr;
if (!ctx->lookup_var_decl (stmt.get_mappings ().get_hirid (), &var))
{
// FIXME this should be an assertion instead and use error mark node
rust_fatal_error (stmt.get_locus (),
"failed to lookup compiled variable declaration");
return;
}
tree init = CompileExpr::Compile (stmt.get_init_expr (), ctx);
// FIXME use error_mark_node, check that CompileExpr returns error_mark_node
// on failure and make this an assertion
if (init == nullptr)
return;
TyTy::BaseType *actual = nullptr;
bool ok = ctx->get_tyctx ()->lookup_type (
stmt.get_init_expr ()->get_mappings ().get_hirid (), &actual);
rust_assert (ok);
Location lvalue_locus = stmt.get_pattern ()->get_locus ();
Location rvalue_locus = stmt.get_init_expr ()->get_locus ();
TyTy::BaseType *expected = ty;
init = coercion_site (init, actual, expected, lvalue_locus, rvalue_locus);
auto fnctx = ctx->peek_fn ();
if (ty->is_unit ())
{
tree expr_stmt
= ctx->get_backend ()->expression_statement (fnctx.fndecl, init);
ctx->add_statement (expr_stmt);
}
else
{
auto s = ctx->get_backend ()->init_statement (fnctx.fndecl, var, init);
ctx->add_statement (s);
}
}
// Empty visit for unused Stmt HIR nodes.
void visit (HIR::TupleStruct &) override {}
void visit (HIR::EnumItem &) override {}
void visit (HIR::EnumItemTuple &) override {}
void visit (HIR::EnumItemStruct &) override {}
void visit (HIR::EnumItemDiscriminant &) override {}
void visit (HIR::TypePathSegmentFunction &) override {}
void visit (HIR::TypePath &) override {}
void visit (HIR::QualifiedPathInType &) override {}
void visit (HIR::Module &) override {}
void visit (HIR::ExternCrate &) override {}
void visit (HIR::UseDeclaration &) override {}
void visit (HIR::Function &) override {}
void visit (HIR::TypeAlias &) override {}
void visit (HIR::StructStruct &) override {}
void visit (HIR::Enum &) override {}
void visit (HIR::Union &) override {}
void visit (HIR::ConstantItem &) override {}
void visit (HIR::StaticItem &) override {}
void visit (HIR::Trait &) override {}
void visit (HIR::ImplBlock &) override {}
void visit (HIR::ExternBlock &) override {}
void visit (HIR::EmptyStmt &) override {}
private:
CompileStmt (Context *ctx) : HIRCompileBase (ctx), translated (nullptr) {}
tree translated;
};
} // namespace Compile
} // namespace Rust
#endif // RUST_COMPILE_STMT
|
