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// Copyright (C) 2020-2023 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_UNIFY
#define RUST_UNIFY
#include "rust-tyty-util.h"
#include "rust-hir-type-check.h"
namespace Rust {
namespace Resolver {
class UnifyRules
{
public:
static TyTy::BaseType *Resolve (TyTy::TyWithLocation lhs,
TyTy::TyWithLocation rhs, Location locus,
bool commit_flag, bool emit_error);
protected:
TyTy::BaseType *expect_inference_variable (TyTy::InferType *ltype,
TyTy::BaseType *rtype);
TyTy::BaseType *expect_adt (TyTy::ADTType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_str (TyTy::StrType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_reference (TyTy::ReferenceType *ltype,
TyTy::BaseType *rtype);
TyTy::BaseType *expect_pointer (TyTy::PointerType *ltype,
TyTy::BaseType *rtype);
TyTy::BaseType *expect_param (TyTy::ParamType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_array (TyTy::ArrayType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_slice (TyTy::SliceType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_fndef (TyTy::FnType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_fnptr (TyTy::FnPtr *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_tuple (TyTy::TupleType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_bool (TyTy::BoolType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_char (TyTy::CharType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_int (TyTy::IntType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_uint (TyTy::UintType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_float (TyTy::FloatType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_isize (TyTy::ISizeType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_usize (TyTy::USizeType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_never (TyTy::NeverType *ltype, TyTy::BaseType *rtype);
TyTy::BaseType *expect_placeholder (TyTy::PlaceholderType *ltype,
TyTy::BaseType *rtype);
TyTy::BaseType *expect_projection (TyTy::ProjectionType *ltype,
TyTy::BaseType *rtype);
TyTy::BaseType *expect_dyn (TyTy::DynamicObjectType *ltype,
TyTy::BaseType *rtype);
TyTy::BaseType *expect_closure (TyTy::ClosureType *ltype,
TyTy::BaseType *rtype);
private:
UnifyRules (TyTy::TyWithLocation lhs, TyTy::TyWithLocation rhs,
Location locus, bool commit_flag, bool emit_error);
void emit_type_mismatch () const;
void commit (TyTy::BaseType *resolved);
TyTy::BaseType *go ();
TyTy::BaseType *get_base ();
TyTy::BaseType *get_other ();
TyTy::TyWithLocation lhs;
TyTy::TyWithLocation rhs;
Location locus;
bool commit_flag;
bool emit_error;
Analysis::Mappings &mappings;
TypeCheckContext &context;
};
} // namespace Resolver
} // namespace Rust
#endif // RUST_UNIFY
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