scoping_analysis.h 1.62 KB
Newer Older
Kevin Modzelewski's avatar
Kevin Modzelewski committed
1
// Copyright (c) 2014 Dropbox, Inc.
Kevin Modzelewski's avatar
Kevin Modzelewski committed
2
//
Kevin Modzelewski's avatar
Kevin Modzelewski committed
3 4 5
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
Kevin Modzelewski's avatar
Kevin Modzelewski committed
6
//
Kevin Modzelewski's avatar
Kevin Modzelewski committed
7
//    http://www.apache.org/licenses/LICENSE-2.0
Kevin Modzelewski's avatar
Kevin Modzelewski committed
8
//
Kevin Modzelewski's avatar
Kevin Modzelewski committed
9 10 11 12 13 14 15 16 17 18 19 20 21
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef PYSTON_ANALYSIS_SCOPINGANALYSIS_H
#define PYSTON_ANALYSIS_SCOPINGANALYSIS_H

#include "core/common.h"

namespace pyston {

22
class AST;
Kevin Modzelewski's avatar
Kevin Modzelewski committed
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
class AST_Module;

class ScopeInfo {
    public:
        virtual ~ScopeInfo() {}
        virtual ScopeInfo* getParent() = 0;

        virtual bool createsClosure() = 0;
        virtual bool takesClosure() = 0;

        virtual bool refersToGlobal(const std::string &name) = 0;
        virtual bool refersToClosure(const std::string name) = 0;
        virtual bool saveInClosure(const std::string name) = 0;
};

class ScopingAnalysis {
    public:
        struct ScopeNameUsage;
        typedef std::unordered_map<AST*, ScopeNameUsage*> NameUsageMap;

    private:

        std::unordered_map<AST*, ScopeInfo*> scopes;
        AST_Module* parent_module;

        ScopeInfo* analyzeSubtree(AST* node);
        void processNameUsages(NameUsageMap* usages);

    public:
        ScopingAnalysis(AST_Module *m);
        ScopeInfo* getScopeInfoForNode(AST* node);
};

ScopingAnalysis* runScopingAnalysis(AST_Module* m);

}

#endif