assignment.h

//===-- lib/Semantics/assignment.h ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef FORTRAN_SEMANTICS_ASSIGNMENT_H_
#define FORTRAN_SEMANTICS_ASSIGNMENT_H_
 
#include "flang/Common/indirection.h"
#include "flang/Evaluate/expression.h"
#include "flang/Semantics/semantics.h"
 
namespace Fortran::parser {
class ContextualMessages;
struct AssignmentStmt;
struct EndWhereStmt;
struct MaskedElsewhereStmt;
struct PointerAssignmentStmt;
struct WhereConstructStmt;
struct WhereStmt;
} // namespace Fortran::parser
 
namespace Fortran::semantics {
 
class AssignmentContext;
class Scope;
class Symbol;
 
// Applies checks from C1594(5-6) on copying pointers in pure subprograms
bool CheckCopyabilityInPureScope(parser::ContextualMessages &,
    const evaluate::Expr<evaluate::SomeType> &, const Scope &);
 
class AssignmentChecker : public virtual BaseChecker {
public:
  explicit AssignmentChecker(SemanticsContext &);
  ~AssignmentChecker();
  void Enter(const parser::AssignmentStmt &);
  void Enter(const parser::PointerAssignmentStmt &);
  void Enter(const parser::WhereStmt &);
  void Leave(const parser::WhereStmt &);
  void Enter(const parser::WhereConstructStmt &);
  void Leave(const parser::EndWhereStmt &);
  void Enter(const parser::MaskedElsewhereStmt &);
  void Leave(const parser::MaskedElsewhereStmt &);
 
private:
  common::Indirection<AssignmentContext> context_;
};
 
} // namespace Fortran::semantics
 
extern template class Fortran::common::Indirection<
    Fortran::semantics::AssignmentContext>;
#endif // FORTRAN_SEMANTICS_ASSIGNMENT_H_