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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/*
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/>.
*/
#include <libsolidity/analysis/SyntaxChecker.h>
#include <memory>
#include <libsolidity/ast/AST.h>
#include <libsolidity/analysis/SemVerHandler.h>
#include <libsolidity/interface/Version.h>
using namespace std;
using namespace dev;
using namespace dev::solidity;
bool SyntaxChecker::checkSyntax(ASTNode const& _astRoot)
{
_astRoot.accept(*this);
return Error::containsOnlyWarnings(m_errors);
}
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(SourceUnit const&)
{
m_versionPragmaFound = false;
return true;
}
void SyntaxChecker::endVisit(SourceUnit const& _sourceUnit)
{
if (!m_versionPragmaFound)
{
string errorString("Source file does not specify required compiler version!");
SemVerVersion recommendedVersion{string(VersionString)};
if (!recommendedVersion.isPrerelease())
errorString +=
"Consider adding \"pragma solidity ^" +
to_string(recommendedVersion.major()) +
string(".") +
to_string(recommendedVersion.minor()) +
string(".") +
to_string(recommendedVersion.patch());
string(";\"");
auto err = make_shared<Error>(Error::Type::Warning);
*err <<
errinfo_sourceLocation(_sourceUnit.location()) <<
errinfo_comment(errorString);
m_errors.push_back(err);
}
}
bool SyntaxChecker::visit(PragmaDirective const& _pragma)
{
solAssert(!_pragma.tokens().empty(), "");
solAssert(_pragma.tokens().size() == _pragma.literals().size(), "");
if (_pragma.tokens()[0] != Token::Identifier || _pragma.literals()[0] != "solidity")
syntaxError(_pragma.location(), "Unknown pragma \"" + _pragma.literals()[0] + "\"");
else
{
vector<Token::Value> tokens(_pragma.tokens().begin() + 1, _pragma.tokens().end());
vector<string> literals(_pragma.literals().begin() + 1, _pragma.literals().end());
SemVerMatchExpressionParser parser(tokens, literals);
auto matchExpression = parser.parse();
SemVerVersion currentVersion{string(VersionString)};
if (!matchExpression.matches(currentVersion))
syntaxError(
_pragma.location(),
"Source file requires different compiler version (current compiler is " +
string(VersionString) + " - note that nightly builds are considered to be "
"strictly less than the released version"
);
m_versionPragmaFound = true;
}
return true;
}
bool SyntaxChecker::visit(ModifierDefinition const&)
{
m_placeholderFound = false;
return true;
}
void SyntaxChecker::endVisit(ModifierDefinition const& _modifier)
{
if (!m_placeholderFound)
syntaxError(_modifier.body().location(), "Modifier body does not contain '_'.");
m_placeholderFound = false;
}
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;
}
bool SyntaxChecker::visit(PlaceholderStatement const&)
{
m_placeholderFound = true;
return true;
}
|
