libsolidity/analysis/SyntaxChecker.cpp


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

/*
    This file is part of cpp-ethereum.

    cpp-ethereum 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.

    cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <memory>
#include <libsolidity/ast/AST.h>
#include <libsolidity/analysis/SyntaxChecker.h>

using namespace std;
using namespace dev;
using namespace dev::solidity;


bool SyntaxChecker::checkSyntax(SourceUnit const& _sourceUnit)
{
    _sourceUnit.accept(*this);
    return m_errors.empty();
}

void SyntaxChecker::syntaxError(SourceLocation const& _location, std::string const& _description)
{
    auto err = make_shared<Error>(Error::Type::SyntaxError);
    *err <<
        errinfo_sourceLocation(_location) <<
        errinfo_comment(_description);

    m_errors.push_back(err);
}

bool SyntaxChecker::visit(WhileStatement const&)
{
    m_inLoopDepth++;
    return true;
}

void SyntaxChecker::endVisit(WhileStatement const&)
{
    m_inLoopDepth--;
}

bool SyntaxChecker::visit(ForStatement const&)
{
    m_inLoopDepth++;
    return true;
}

void SyntaxChecker::endVisit(ForStatement const&)
{
    m_inLoopDepth--;
}

bool SyntaxChecker::visit(Continue const& _continueStatement)
{
    if (m_inLoopDepth <= 0)
        // we're not in a for/while loop, report syntax error
        syntaxError(_continueStatement.location(), "\"continue\" has to be in a \"for\" or \"while\" loop.");
    return true;
}

bool SyntaxChecker::visit(Break const& _breakStatement)
{
    if (m_inLoopDepth <= 0)
        // we're not in a for/while loop, report syntax error
        syntaxError(_breakStatement.location(), "\"break\" has to be in a \"for\" or \"while\" loop.");
    return true;
}