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// 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-compile-base.h"
#include "rust-hir-visitor.h"
namespace Rust {
namespace Compile {
class CompilePatternCheckExpr : public HIRCompileBase,
public HIR::HIRPatternVisitor
{
public:
static tree Compile (HIR::Pattern &pattern, tree match_scrutinee_expr,
Context *ctx)
{
CompilePatternCheckExpr compiler (ctx, match_scrutinee_expr);
pattern.accept_vis (compiler);
rust_assert (compiler.check_expr);
return compiler.check_expr;
}
void visit (HIR::PathInExpression &pattern) override;
void visit (HIR::LiteralPattern &) override;
void visit (HIR::RangePattern &pattern) override;
void visit (HIR::ReferencePattern &) override;
void visit (HIR::AltPattern &) override;
void visit (HIR::StructPattern &) override;
void visit (HIR::TupleStructPattern &) override;
void visit (HIR::TuplePattern &) override;
// Always succeeds
void visit (HIR::IdentifierPattern &) override
{
check_expr = boolean_true_node;
}
void visit (HIR::WildcardPattern &) override
{
check_expr = boolean_true_node;
}
// Empty visit for unused Pattern HIR nodes.
void visit (HIR::QualifiedPathInExpression &) override {}
void visit (HIR::SlicePattern &) override {}
CompilePatternCheckExpr (Context *ctx, tree match_scrutinee_expr)
: HIRCompileBase (ctx), match_scrutinee_expr (match_scrutinee_expr),
check_expr (NULL_TREE)
{}
tree match_scrutinee_expr;
tree check_expr;
};
class CompilePatternBindings : public HIRCompileBase,
public HIR::HIRPatternVisitor
{
public:
static void Compile (HIR::Pattern &pattern, tree match_scrutinee_expr,
Context *ctx)
{
CompilePatternBindings compiler (ctx, match_scrutinee_expr);
pattern.accept_vis (compiler);
}
void visit (HIR::StructPattern &pattern) override;
void visit (HIR::TupleStructPattern &pattern) override;
void visit (HIR::ReferencePattern &pattern) override;
void visit (HIR::IdentifierPattern &) override;
void visit (HIR::TuplePattern &pattern) override;
// Empty visit for unused Pattern HIR nodes.
void visit (HIR::AltPattern &) override {}
void visit (HIR::LiteralPattern &) override {}
void visit (HIR::PathInExpression &) override {}
void visit (HIR::QualifiedPathInExpression &) override {}
void visit (HIR::RangePattern &) override {}
void visit (HIR::SlicePattern &) override {}
void visit (HIR::WildcardPattern &) override {}
protected:
CompilePatternBindings (Context *ctx, tree match_scrutinee_expr)
: HIRCompileBase (ctx), match_scrutinee_expr (match_scrutinee_expr)
{}
tree match_scrutinee_expr;
};
class CompilePatternLet : public HIRCompileBase, public HIR::HIRPatternVisitor
{
public:
static void Compile (HIR::Pattern *pattern, tree init_expr,
TyTy::BaseType *ty, location_t rval_locus, Context *ctx)
{
CompilePatternLet compiler (ctx, init_expr, ty, rval_locus);
pattern->accept_vis (compiler);
}
void visit (HIR::IdentifierPattern &) override;
void visit (HIR::WildcardPattern &) override;
void visit (HIR::TuplePattern &) override;
// check for unimplemented Pattern HIR nodes.
void visit (HIR::AltPattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"alternate pattern let statements not supported");
}
void visit (HIR::LiteralPattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"literal pattern let statements not supported");
}
void visit (HIR::PathInExpression &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"path-in-expression pattern let statements not supported");
}
void visit (HIR::QualifiedPathInExpression &pattern) override
{
rust_sorry_at (
pattern.get_locus (),
"qualified-path-in-expression pattern let statements not supported");
}
void visit (HIR::RangePattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"range pattern let statements not supported");
}
void visit (HIR::ReferencePattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"reference pattern let statements not supported");
}
void visit (HIR::SlicePattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"slice pattern let statements not supported");
}
void visit (HIR::StructPattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"struct pattern let statements not supported");
}
void visit (HIR::TupleStructPattern &pattern) override
{
rust_sorry_at (pattern.get_locus (),
"tuple-struct pattern let statements not supported");
}
protected:
CompilePatternLet (Context *ctx, tree init_expr, TyTy::BaseType *ty,
location_t rval_locus)
: HIRCompileBase (ctx), init_expr (init_expr), ty (ty),
rval_locus (rval_locus)
{}
tree init_expr;
TyTy::BaseType *ty;
location_t rval_locus;
};
} // namespace Compile
} // namespace Rust
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