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Refactor function override check to remove duplicate logic

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This commit is contained in:
Federico Bond 2017-07-19 14:32:26 -03:00 committed by Alex Beregszaszi
parent f0dc572055
commit a6949851f3
2 changed files with 50 additions and 47 deletions
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92
libsolidity/analysis/TypeChecker.cpp
View File

@ -277,21 +277,10 @@ void TypeChecker::checkContractIllegalOverrides(ContractDefinition const& _contr
string const& name = function->name();
if (modifiers.count(name))
m_errorReporter.typeError(modifiers[name]->location(), "Override changes function to modifier.");
FunctionType functionType(*function);
// function should not change the return type
for (FunctionDefinition const* overriding: functions[name])
{
FunctionType overridingType(*overriding);
if (!overridingType.hasEqualArgumentTypes(functionType))
continue;
if (
overriding->visibility() != function->visibility() ||
overriding->isDeclaredConst() != function->isDeclaredConst() ||
overriding->isPayable() != function->isPayable() ||
overridingType != functionType
)
overrideTypeError(*overriding, *function);
}
checkFunctionOverride(*overriding, *function);
functions[name].push_back(function);
}
for (ModifierDefinition const* modifier: contract->functionModifiers())
@ -308,6 +297,51 @@ void TypeChecker::checkContractIllegalOverrides(ContractDefinition const& _contr
}
}
void TypeChecker::checkFunctionOverride(FunctionDefinition const& function, FunctionDefinition const& super)
{
FunctionType functionType(function);
FunctionType superType(super);
if (!functionType.hasEqualArgumentTypes(superType))
return;
if (function.visibility() != super.visibility())
m_errorReporter.typeError(
function.location(),
"Overriding function visibility differs from " + super.fullyQualifiedName() + "."
);
if (function.isDeclaredConst() && !super.isDeclaredConst())
m_errorReporter.typeError(
function.location(),
"Overriding function should not be declared constant."
);
if (!function.isDeclaredConst() && super.isDeclaredConst())
m_errorReporter.typeError(
function.location(),
"Overriding function should be declared constant."
);
if (function.isPayable() && !super.isPayable())
m_errorReporter.typeError(
function.location(),
"Overriding function should not be declared payable."
);
if (!function.isPayable() && super.isPayable())
m_errorReporter.typeError(
function.location(),
"Overriding function should be declared payable."
);
if (functionType != superType)
m_errorReporter.typeError(
function.location(),
"Overriding function return types differ from " + super.fullyQualifiedName() + "."
);
}
void TypeChecker::checkContractExternalTypeClashes(ContractDefinition const& _contract)
{
map<string, vector<pair<Declaration const*, FunctionTypePointer>>> externalDeclarations;
@ -1949,33 +1983,3 @@ void TypeChecker::requireLValue(Expression const& _expression)
else if (!_expression.annotation().isLValue)
m_errorReporter.typeError(_expression.location(), "Expression has to be an lvalue.");
}
void TypeChecker::overrideTypeError(FunctionDefinition const& function, FunctionDefinition const& super)
{
string message;
if (function.visibility() != super.visibility())
message = "Overriding function visibility differs from " + super.fullyQualifiedName() + ".";
else if (function.isDeclaredConst() && !super.isDeclaredConst())
message = "Overriding function should not be declared constant.";
else if (!function.isDeclaredConst() && super.isDeclaredConst())
message = "Overriding function should be declared constant.";
else if (function.isPayable() && !super.isPayable())
message = "Overriding function should not be declared payable.";
else if (!function.isPayable() && super.isPayable())
message = "Overriding function should be declared payable.";
if (message.empty())
{
FunctionType functionType(function);
FunctionType superType(super);
if (functionType != superType)
message = "Overriding function return types differ from " + super.fullyQualifiedName() + ".";
}
if (message.empty())
message = "Overriding function signature differs from " + super.fullyQualifiedName() + ".";
m_errorReporter.typeError(function.location(), message);
}

5
libsolidity/analysis/TypeChecker.h
View File

@ -62,6 +62,8 @@ private:
/// arguments and that there is at most one constructor.
void checkContractDuplicateFunctions(ContractDefinition const& _contract);
void checkContractIllegalOverrides(ContractDefinition const& _contract);
/// Reports a type error with an appropiate message if overriden function signature differs.
void checkFunctionOverride(FunctionDefinition const& function, FunctionDefinition const& super);
void checkContractAbstractFunctions(ContractDefinition const& _contract);
void checkContractAbstractConstructors(ContractDefinition const& _contract);
/// Checks that different functions with external visibility end up having different
@ -120,9 +122,6 @@ private:
/// Runs type checks on @a _expression to infer its type and then checks that it is an LValue.
void requireLValue(Expression const& _expression);
/// Reports a type error with an appropiate message when overriden function signature differs.
void overrideTypeError(FunctionDefinition const& function, FunctionDefinition const& super);
ContractDefinition const* m_scope = nullptr;
ErrorReporter& m_errorReporter;