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Support for negative literals.

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This commit is contained in:
Christian
2014-11-06 02:44:43 +01:00
parent b5e77678c9
commit 627c80f0a8
3 changed files with 17 additions and 15 deletions
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Types.cpp
+5 -3
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@@ -89,10 +89,14 @@ shared_ptr<Type> Type::forLiteral(Literal const& _literal)
shared_ptr<IntegerType> IntegerType::smallestTypeForLiteral(string const& _literal)
{
bigint value(_literal);
bool isSigned = value < 0 || (!_literal.empty() && _literal.front() == '-');
if (isSigned)
// convert to positive number of same bit requirements
value = ((-value) - 1) << 1;
unsigned bytes = max(bytesRequired(value), 1u);
if (bytes > 32)
return shared_ptr<IntegerType>();
return make_shared<IntegerType>(bytes * 8, Modifier::UNSIGNED);
return make_shared<IntegerType>(bytes * 8, isSigned ? Modifier::SIGNED : Modifier::UNSIGNED);
}
IntegerType::IntegerType(int _bits, IntegerType::Modifier _modifier):
@@ -169,8 +173,6 @@ string IntegerType::toString() const
u256 IntegerType::literalValue(Literal const& _literal) const
{
bigint value(_literal.getValue());
//@todo check that the number is not too large
//@todo does this work for signed numbers?
return u256(value);
}