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
157
158
159
160
161
162
163
164
|
/*
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/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* Solidity parser.
*/
#pragma once
#include <libsolidity/ast/AST.h>
#include <libsolidity/parsing/ParserBase.h>
namespace dev
{
namespace solidity
{
class Scanner;
class Parser: public ParserBase
{
public:
Parser(ErrorList& _errors): ParserBase(_errors) {}
ASTPointer<SourceUnit> parse(std::shared_ptr<Scanner> const& _scanner);
private:
class ASTNodeFactory;
struct VarDeclParserOptions
{
VarDeclParserOptions() {}
bool allowVar = false;
bool isStateVariable = false;
bool allowIndexed = false;
bool allowEmptyName = false;
bool allowInitialValue = false;
bool allowLocationSpecifier = false;
};
/// This struct is shared for parsing a function header and a function type.
struct FunctionHeaderParserResult
{
ASTPointer<ASTString> name;
ASTPointer<ParameterList> parameters;
ASTPointer<ParameterList> returnParameters;
Declaration::Visibility visibility = Declaration::Visibility::Default;
bool isDeclaredConst = false;
bool isPayable = false;
std::vector<ASTPointer<ModifierInvocation>> modifiers;
};
///@{
///@name Parsing functions for the AST nodes
ASTPointer<PragmaDirective> parsePragmaDirective();
ASTPointer<ImportDirective> parseImportDirective();
ASTPointer<ContractDefinition> parseContractDefinition(bool _isLibrary);
ASTPointer<InheritanceSpecifier> parseInheritanceSpecifier();
Declaration::Visibility parseVisibilitySpecifier(Token::Value _token);
FunctionHeaderParserResult parseFunctionHeader(bool _forceEmptyName, bool _allowModifiers);
ASTPointer<FunctionDefinition> parseFunctionDefinition(ASTString const* _contractName);
ASTPointer<StructDefinition> parseStructDefinition();
ASTPointer<EnumDefinition> parseEnumDefinition();
ASTPointer<EnumValue> parseEnumValue();
ASTPointer<VariableDeclaration> parseVariableDeclaration(
VarDeclParserOptions const& _options = VarDeclParserOptions(),
ASTPointer<TypeName> const& _lookAheadArrayType = ASTPointer<TypeName>()
);
ASTPointer<ModifierDefinition> parseModifierDefinition();
ASTPointer<EventDefinition> parseEventDefinition();
ASTPointer<UsingForDirective> parseUsingDirective();
ASTPointer<ModifierInvocation> parseModifierInvocation();
ASTPointer<Identifier> parseIdentifier();
ASTPointer<UserDefinedTypeName> parseUserDefinedTypeName();
ASTPointer<TypeName> parseTypeName(bool _allowVar);
ASTPointer<FunctionTypeName> parseFunctionType();
ASTPointer<Mapping> parseMapping();
ASTPointer<ParameterList> parseParameterList(
VarDeclParserOptions const& _options,
bool _allowEmpty = true
);
ASTPointer<Block> parseBlock(ASTPointer<ASTString> const& _docString = {});
ASTPointer<Statement> parseStatement();
ASTPointer<InlineAssembly> parseInlineAssembly(ASTPointer<ASTString> const& _docString = {});
ASTPointer<IfStatement> parseIfStatement(ASTPointer<ASTString> const& _docString);
ASTPointer<WhileStatement> parseWhileStatement(ASTPointer<ASTString> const& _docString);
ASTPointer<WhileStatement> parseDoWhileStatement(ASTPointer<ASTString> const& _docString);
ASTPointer<ForStatement> parseForStatement(ASTPointer<ASTString> const& _docString);
/// A "simple statement" can be a variable declaration statement or an expression statement.
ASTPointer<Statement> parseSimpleStatement(ASTPointer<ASTString> const& _docString);
ASTPointer<VariableDeclarationStatement> parseVariableDeclarationStatement(
ASTPointer<ASTString> const& _docString,
ASTPointer<TypeName> const& _lookAheadArrayType = ASTPointer<TypeName>()
);
ASTPointer<ExpressionStatement> parseExpressionStatement(
ASTPointer<ASTString> const& _docString,
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
);
ASTPointer<Expression> parseExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
);
ASTPointer<Expression> parseBinaryExpression(int _minPrecedence = 4,
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
);
ASTPointer<Expression> parseUnaryExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
);
ASTPointer<Expression> parseLeftHandSideExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
);
ASTPointer<Expression> parsePrimaryExpression();
std::vector<ASTPointer<Expression>> parseFunctionCallListArguments();
std::pair<std::vector<ASTPointer<Expression>>, std::vector<ASTPointer<ASTString>>> parseFunctionCallArguments();
///@}
///@{
///@name Helper functions
/// Used as return value of @see peekStatementType.
enum class LookAheadInfo
{
IndexAccessStructure, VariableDeclarationStatement, ExpressionStatement
};
/// Performs limited look-ahead to distinguish between variable declaration and expression statement.
/// For source code of the form "a[][8]" ("IndexAccessStructure"), this is not possible to
/// decide with constant look-ahead.
LookAheadInfo peekStatementType() const;
/// @returns a typename parsed in look-ahead fashion from something like "a.b[8][2**70]".
ASTPointer<TypeName> typeNameIndexAccessStructure(
std::vector<ASTPointer<PrimaryExpression>> const& _path,
std::vector<std::pair<ASTPointer<Expression>, SourceLocation>> const& _indices
);
/// @returns an expression parsed in look-ahead fashion from something like "a.b[8][2**70]".
ASTPointer<Expression> expressionFromIndexAccessStructure(
std::vector<ASTPointer<PrimaryExpression>> const& _path,
std::vector<std::pair<ASTPointer<Expression>, SourceLocation>> const& _indices
);
///@}
/// Creates an empty ParameterList at the current location (used if parameters can be omitted).
ASTPointer<ParameterList> createEmptyParameterList();
/// Flag that signifies whether '_' is parsed as a PlaceholderStatement or a regular identifier.
bool m_insideModifier = false;
};
}
}
|
