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Warn deprecated usage of parameter names in function types

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This commit is contained in:
Federico Bond 2017-06-24 14:09:19 -03:00
parent bffb8c404f
commit 70fd5c1770
4 changed files with 36 additions and 2 deletions
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4
docs/types.rst
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@ -387,10 +387,10 @@ Example that shows how to use internal function types::
} }
function reduce( function reduce(
uint[] memory self, uint[] memory self,
function (uint x, uint y) returns (uint) f function (uint, uint) returns (uint) f
) )
internal internal
returns (uint r) returns (uint)
{ {
r = self[0]; r = self[0];
for (uint i = 1; i < self.length; i++) { for (uint i = 1; i < self.length; i++) {

12
libsolidity/analysis/SyntaxChecker.cpp
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@ -148,3 +148,15 @@ bool SyntaxChecker::visit(PlaceholderStatement const&)
return true; return true;
} }
bool SyntaxChecker::visit(FunctionTypeName const& _node)
{
for (auto const& decl: _node.parameterTypeList()->parameters())
if (!decl->name().empty())
m_errorReporter.warning(decl->location(), "Naming function type parameters is deprecated.");
for (auto const& decl: _node.returnParameterTypeList()->parameters())
if (!decl->name().empty())
m_errorReporter.warning(decl->location(), "Naming function type return parameters is deprecated.");
return true;
}

2
libsolidity/analysis/SyntaxChecker.h
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@ -63,6 +63,8 @@ private:
virtual bool visit(PlaceholderStatement const& _placeholderStatement) override; virtual bool visit(PlaceholderStatement const& _placeholderStatement) override;
virtual bool visit(FunctionTypeName const& _node) override;
ErrorReporter& m_errorReporter; ErrorReporter& m_errorReporter;
/// Flag that indicates whether a function modifier actually contains '_'. /// Flag that indicates whether a function modifier actually contains '_'.

20
test/libsolidity/SolidityNameAndTypeResolution.cpp
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@ -5022,6 +5022,26 @@ BOOST_AUTO_TEST_CASE(external_function_type_to_uint)
CHECK_ERROR(text, TypeError, "Explicit type conversion not allowed"); CHECK_ERROR(text, TypeError, "Explicit type conversion not allowed");
} }
BOOST_AUTO_TEST_CASE(warn_function_type_parameters_with_names)
{
char const* text = R"(
contract C {
function(uint a) f;
}
)";
CHECK_WARNING(text, "Naming function type parameters is deprecated.");
}
BOOST_AUTO_TEST_CASE(warn_function_type_return_parameters_with_names)
{
char const* text = R"(
contract C {
function(uint) returns(bool ret) f;
}
)";
CHECK_WARNING(text, "Naming function type return parameters is deprecated.");
}
BOOST_AUTO_TEST_CASE(shift_constant_left_negative_rvalue) BOOST_AUTO_TEST_CASE(shift_constant_left_negative_rvalue)
{ {
char const* text = R"( char const* text = R"(