source: src/ResolvExpr/FindOpenVars.cc @ 5186775

//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// FindOpenVars.cc --
//
// Author           : Richard C. Bilson
// Created On       : Sun May 17 09:42:48 2015
// Last Modified By : Andrew
// Last Modified On : Fri Jul 12 14:18:00 2019
// Update Count     : 4
//

#include "FindOpenVars.h"

#include <list>                   // for _List_const_iterator, list<>::const...
#include <map>                    // for map<>::mapped_type

#include "AST/Pass.hpp"
#include "AST/Type.hpp"
#include "AST/TypeEnvironment.hpp"
#include "Common/PassVisitor.h"
#include "SynTree/Declaration.h"  // for TypeDecl, DeclarationWithType (ptr ...
#include "SynTree/Type.h"         // for Type, Type::ForallList, ArrayType

#include <iostream>

namespace ResolvExpr {
        struct FindOpenVars_old : public WithGuards {
                FindOpenVars_old( OpenVarSet &openVars, OpenVarSet &closedVars, AssertionSet &needAssertions, AssertionSet &haveAssertions, bool firstIsOpen );

                void previsit( const PointerType * pointerType );
                void previsit( const ArrayType * arrayType );
                void previsit( const FunctionType * functionType );
                void previsit( const TupleType * tupleType );

                void common_action( const Type *type );

                OpenVarSet &openVars, &closedVars;
                AssertionSet &needAssertions, &haveAssertions;
                bool nextIsOpen;
        };

        void findOpenVars( const Type *type, OpenVarSet &openVars, OpenVarSet &closedVars, AssertionSet &needAssertions, AssertionSet &haveAssertions, bool firstIsOpen ) {
                PassVisitor<FindOpenVars_old> finder( openVars, closedVars, needAssertions, haveAssertions, firstIsOpen );
                type->accept( finder );
        }

        FindOpenVars_old::FindOpenVars_old( OpenVarSet &openVars, OpenVarSet &closedVars, AssertionSet &needAssertions, AssertionSet &haveAssertions, bool firstIsOpen )
                : openVars( openVars ), closedVars( closedVars ), needAssertions( needAssertions ), haveAssertions( haveAssertions ), nextIsOpen( firstIsOpen ) {
        }

        void FindOpenVars_old::common_action( const Type * type ) {
                if ( nextIsOpen ) {
                        for ( Type::ForallList::const_iterator i = type->forall.begin(); i != type->forall.end(); ++i ) {
                                openVars[ (*i)->get_name() ] = TypeDecl::Data{ (*i) };
                                for ( std::list< DeclarationWithType* >::const_iterator assert = (*i)->get_assertions().begin(); assert != (*i)->get_assertions().end(); ++assert ) {
                                        needAssertions[ *assert ].isUsed = false;
                                }
///       cloneAll( (*i)->get_assertions(), needAssertions );
///       needAssertions.insert( needAssertions.end(), (*i)->get_assertions().begin(), (*i)->get_assertions().end() );
                        }
                } else {
                        for ( Type::ForallList::const_iterator i = type->forall.begin(); i != type->forall.end(); ++i ) {
                                closedVars[ (*i)->get_name() ] = TypeDecl::Data{ (*i) };
                                for ( std::list< DeclarationWithType* >::const_iterator assert = (*i)->get_assertions().begin(); assert != (*i)->get_assertions().end(); ++assert ) {
                                        haveAssertions[ *assert ].isUsed = false;
                                }
///       cloneAll( (*i)->get_assertions(), haveAssertions );
///       haveAssertions.insert( haveAssertions.end(), (*i)->get_assertions().begin(), (*i)->get_assertions().end() );
                        } // for
                } // if
///   std::cerr << "type is ";
///   type->print( std::cerr );
///   std::cerr << std::endl << "need is" << std::endl;
///   printAssertionSet( needAssertions, std::cerr );
///   std::cerr << std::endl << "have is" << std::endl;
///   printAssertionSet( haveAssertions, std::cerr );
        }

        void FindOpenVars_old::previsit(const PointerType * pointerType) {
                common_action( pointerType );
        }

        void FindOpenVars_old::previsit(const ArrayType * arrayType) {
                common_action( arrayType );
        }

        void FindOpenVars_old::previsit(const FunctionType * functionType) {
                common_action( functionType );
                nextIsOpen = ! nextIsOpen;
                GuardAction( [this](){ nextIsOpen = ! nextIsOpen; } );
        }

        void FindOpenVars_old::previsit(const TupleType * tupleType) {
                common_action( tupleType );
        }

        namespace {
                struct FindOpenVars_new final : public ast::WithGuards {
                        ast::OpenVarSet & open;
                        ast::OpenVarSet & closed;
                        ast::AssertionSet & need;
                        ast::AssertionSet & have;
                        ast::TypeEnvironment & env;
                        bool nextIsOpen;

                        FindOpenVars_new(
                                ast::OpenVarSet & o, ast::OpenVarSet & c, ast::AssertionSet & n,
                                ast::AssertionSet & h, ast::TypeEnvironment & env, FirstMode firstIsOpen )
                        : open( o ), closed( c ), need( n ), have( h ), env (env), nextIsOpen( firstIsOpen ) {}

                        void previsit( const ast::FunctionType * type ) {
                                // mark open/closed variables
                                if ( nextIsOpen ) {
                                        // trying to remove this from resolver.
                                        // occasionally used in other parts so not deleting right now.

                                        // insert open variables unbound to environment.
                                        env.add(type->forall);

                                        for ( auto & decl : type->forall ) {
                                                open[ *decl ] = ast::TypeData{ decl->base };
                                        }
                                        for ( auto & assert : type->assertions ) {
                                                need[ assert ].isUsed = false;
                                        }
                                } else {
                                        for ( auto & decl : type->forall ) {
                                                closed[ *decl ] = ast::TypeData{ decl->base };
                                        }
                                        for ( auto & assert : type->assertions ) {
                                                have[ assert ].isUsed = false;
                                        }
                                }

                                // flip open variables for contained function types
                                nextIsOpen = ! nextIsOpen;
                                GuardAction( [this](){ nextIsOpen = ! nextIsOpen; } );
                        }

                };
        }

        void findOpenVars(
                        const ast::Type * type, ast::OpenVarSet & open, ast::OpenVarSet & closed,
                        ast::AssertionSet & need, ast::AssertionSet & have, ast::TypeEnvironment & env, FirstMode firstIsOpen ) {
                ast::Pass< FindOpenVars_new > finder{ open, closed, need, have, env, firstIsOpen };
                type->accept( finder );

                if (!closed.empty()) {
                        std::cerr << "closed: ";
                        for (auto& i : closed) {
                                std::cerr << i.first.base->location << ":" << i.first.base->name << ' ';
                        }
                        std::cerr << std::endl;
                }
        }
} // namespace ResolvExpr

// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //