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Refactor expression parser.

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This commit is contained in:
chriseth 2018-04-28 00:17:35 +02:00
parent 1e95335589
commit 86b7adc18f
2 changed files with 21 additions and 21 deletions
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32
libsolidity/parsing/Parser.cpp
View File

@ -1178,20 +1178,20 @@ ASTPointer<VariableDeclarationStatement> Parser::parseVariableDeclarationStateme
ASTPointer<ExpressionStatement> Parser::parseExpressionStatement(
ASTPointer<ASTString> const& _docString,
ASTPointer<Expression> const& _lookAheadIndexAccessStructure
ASTPointer<Expression> const& _partialParserResult
)
{
RecursionGuard recursionGuard(*this);
ASTPointer<Expression> expression = parseExpression(_lookAheadIndexAccessStructure);
ASTPointer<Expression> expression = parseExpression(_partialParserResult);
return ASTNodeFactory(*this, expression).createNode<ExpressionStatement>(_docString, expression);
}
ASTPointer<Expression> Parser::parseExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure
ASTPointer<Expression> const& _partiallyParsedExpression
)
{
RecursionGuard recursionGuard(*this);
ASTPointer<Expression> expression = parseBinaryExpression(4, _lookAheadIndexAccessStructure);
ASTPointer<Expression> expression = parseBinaryExpression(4, _partiallyParsedExpression);
if (Token::isAssignmentOp(m_scanner->currentToken()))
{
Token::Value assignmentOperator = m_scanner->currentToken();
@ -1217,11 +1217,11 @@ ASTPointer<Expression> Parser::parseExpression(
ASTPointer<Expression> Parser::parseBinaryExpression(
int _minPrecedence,
ASTPointer<Expression> const& _lookAheadIndexAccessStructure
ASTPointer<Expression> const& _partiallyParsedExpression
)
{
RecursionGuard recursionGuard(*this);
ASTPointer<Expression> expression = parseUnaryExpression(_lookAheadIndexAccessStructure);
ASTPointer<Expression> expression = parseUnaryExpression(_partiallyParsedExpression);
ASTNodeFactory nodeFactory(*this, expression);
int precedence = Token::precedence(m_scanner->currentToken());
for (; precedence >= _minPrecedence; --precedence)
@ -1237,14 +1237,14 @@ ASTPointer<Expression> Parser::parseBinaryExpression(
}
ASTPointer<Expression> Parser::parseUnaryExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure
ASTPointer<Expression> const& _partiallyParsedExpression
)
{
RecursionGuard recursionGuard(*this);
ASTNodeFactory nodeFactory = _lookAheadIndexAccessStructure ?
ASTNodeFactory(*this, _lookAheadIndexAccessStructure) : ASTNodeFactory(*this);
ASTNodeFactory nodeFactory = _partiallyParsedExpression ?
ASTNodeFactory(*this, _partiallyParsedExpression) : ASTNodeFactory(*this);
Token::Value token = m_scanner->currentToken();
if (!_lookAheadIndexAccessStructure && (Token::isUnaryOp(token) || Token::isCountOp(token)))
if (!_partiallyParsedExpression && (Token::isUnaryOp(token) || Token::isCountOp(token)))
{
// prefix expression
m_scanner->next();
@ -1255,7 +1255,7 @@ ASTPointer<Expression> Parser::parseUnaryExpression(
else
{
// potential postfix expression
ASTPointer<Expression> subExpression = parseLeftHandSideExpression(_lookAheadIndexAccessStructure);
ASTPointer<Expression> subExpression = parseLeftHandSideExpression(_partiallyParsedExpression);
token = m_scanner->currentToken();
if (!Token::isCountOp(token))
return subExpression;
@ -1266,16 +1266,16 @@ ASTPointer<Expression> Parser::parseUnaryExpression(
}
ASTPointer<Expression> Parser::parseLeftHandSideExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure
ASTPointer<Expression> const& _partiallyParsedExpression
)
{
RecursionGuard recursionGuard(*this);
ASTNodeFactory nodeFactory = _lookAheadIndexAccessStructure ?
ASTNodeFactory(*this, _lookAheadIndexAccessStructure) : ASTNodeFactory(*this);
ASTNodeFactory nodeFactory = _partiallyParsedExpression ?
ASTNodeFactory(*this, _partiallyParsedExpression) : ASTNodeFactory(*this);
ASTPointer<Expression> expression;
if (_lookAheadIndexAccessStructure)
expression = _lookAheadIndexAccessStructure;
if (_partiallyParsedExpression)
expression = _partiallyParsedExpression;
else if (m_scanner->currentToken() == Token::New)
{
expectToken(Token::New);

10
libsolidity/parsing/Parser.h
View File

@ -118,19 +118,19 @@ private:
);
ASTPointer<ExpressionStatement> parseExpressionStatement(
ASTPointer<ASTString> const& _docString,
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
ASTPointer<Expression> const& _partiallyParsedExpression = ASTPointer<Expression>()
);
ASTPointer<Expression> parseExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
ASTPointer<Expression> const& _partiallyParsedExpression = ASTPointer<Expression>()
);
ASTPointer<Expression> parseBinaryExpression(int _minPrecedence = 4,
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
ASTPointer<Expression> const& _partiallyParsedExpression = ASTPointer<Expression>()
);
ASTPointer<Expression> parseUnaryExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
ASTPointer<Expression> const& _partiallyParsedExpression = ASTPointer<Expression>()
);
ASTPointer<Expression> parseLeftHandSideExpression(
ASTPointer<Expression> const& _lookAheadIndexAccessStructure = ASTPointer<Expression>()
ASTPointer<Expression> const& _partiallyParsedExpression = ASTPointer<Expression>()
);
ASTPointer<Expression> parsePrimaryExpression();
std::vector<ASTPointer<Expression>> parseFunctionCallListArguments();