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[Sol2Yul] Implements function-to-function cast.

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This commit is contained in:
Christian Parpart
2020-03-09 10:40:57 +01:00
parent c8cbb98002
commit e210026e74
2 changed files with 52 additions and 0 deletions
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libsolidity/codegen/YulUtilFunctions.cpp
+29
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@@ -1333,6 +1333,35 @@ string YulUtilFunctions::allocateMemoryArrayFunction(ArrayType const& _type)
string YulUtilFunctions::conversionFunction(Type const& _from, Type const& _to)
{
if (_from.category() == Type::Category::Function)
{
solAssert(_to.category() == Type::Category::Function, "");
FunctionType const& fromType = dynamic_cast<FunctionType const&>(_from);
FunctionType const& targetType = dynamic_cast<FunctionType const&>(_to);
solAssert(
fromType.isImplicitlyConvertibleTo(targetType) &&
fromType.sizeOnStack() == targetType.sizeOnStack() &&
(fromType.kind() == FunctionType::Kind::Internal || fromType.kind() == FunctionType::Kind::External) &&
fromType.kind() == targetType.kind(),
"Invalid function type conversion requested."
);
string const functionName =
"convert_" +
_from.identifier() +
"_to_" +
_to.identifier();
return m_functionCollector->createFunction(functionName, [&]() {
return Whiskers(R"(
function <functionName>(addr, functionId) -> outAddr, outFunctionId {
outAddr := addr
outFunctionId := functionId
}
)")
("functionName", functionName)
.render();
});
}
if (_from.sizeOnStack() != 1 || _to.sizeOnStack() != 1)
return conversionFunctionSpecial(_from, _to);