aboutsummaryrefslogtreecommitdiffstats
path: root/libsolidity/analysis/ReferencesResolver.h
blob: caa3a78fc8ff57f1c4b1a30a26294dec4dc46f55 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
/*
    This file is part of solidity.

    solidity 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 of the License, or
    (at your option) any later version.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Christian <c@ethdev.com>
 * @date 2014
 * Component that resolves type names to types and annotates the AST accordingly.
 */

#pragma once

#include <map>
#include <list>
#include <boost/noncopyable.hpp>
#include <libsolidity/ast/ASTVisitor.h>
#include <libsolidity/ast/ASTAnnotations.h>

namespace dev
{
namespace solidity
{

class NameAndTypeResolver;

/**
 * Resolves references to declarations (of variables and types) and also establishes the link
 * between a return statement and the return parameter list.
 */
class ReferencesResolver: private ASTConstVisitor
{
public:
    ReferencesResolver(
        ErrorList& _errors,
        NameAndTypeResolver& _resolver,
        ParameterList const* _returnParameters,
        bool _resolveInsideCode = false
    ):
        m_errors(_errors),
        m_resolver(_resolver),
        m_returnParameters(_returnParameters),
        m_resolveInsideCode(_resolveInsideCode)
    {}

    /// @returns true if no errors during resolving
    bool resolve(ASTNode const& _root);

private:
    virtual bool visit(Block const&) override { return m_resolveInsideCode; }
    virtual bool visit(Identifier const& _identifier) override;
    virtual bool visit(ElementaryTypeName const& _typeName) override;
    virtual void endVisit(UserDefinedTypeName const& _typeName) override;
    virtual void endVisit(FunctionTypeName const& _typeName) override;
    virtual void endVisit(Mapping const& _typeName) override;
    virtual void endVisit(ArrayTypeName const& _typeName) override;
    virtual bool visit(InlineAssembly const& _inlineAssembly) override;
    virtual bool visit(Return const& _return) override;
    virtual void endVisit(VariableDeclaration const& _variable) override;

    /// Adds a new error to the list of errors.
    void typeError(SourceLocation const& _location, std::string const& _description);

    /// Adds a new error to the list of errors and throws to abort type checking.
    void fatalTypeError(SourceLocation const& _location, std::string const& _description);

    /// Adds a new error to the list of errors.
    void declarationError(const SourceLocation& _location, std::string const& _description);

    /// Adds a new error to the list of errors and throws to abort type checking.
    void fatalDeclarationError(const SourceLocation& _location, std::string const& _description);

    ErrorList& m_errors;
    NameAndTypeResolver& m_resolver;
    ParameterList const* m_returnParameters;
    bool const m_resolveInsideCode;
    bool m_errorOccurred = false;
};

}
}