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// Copyright (C) 2020 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
{
using Rust::Compile::HIRCompileBase::visit;
public:
static Bexpression *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;
}
Bexpression *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);
TyTy::BaseType *expected = ty;
init = coercion_site (init, actual, expected, stmt.get_locus ());
auto fnctx = ctx->peek_fn ();
if (ty->is_unit ())
{
Bstatement *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);
}
}
private:
CompileStmt (Context *ctx) : HIRCompileBase (ctx), translated (nullptr) {}
Bexpression *translated;
};
} // namespace Compile
} // namespace Rust
#endif // RUST_COMPILE_STMT
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