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Support shifting constants

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RJ 2016-05-17 10:04:10 -05:00 committed by Alex Beregszaszi
parent 2bb37f8203
commit 48f2028911
1 changed files with 22 additions and 0 deletions
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22
libsolidity/ast/Types.cpp
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@ -705,6 +705,28 @@ TypePointer RationalNumberType::binaryOperatorResult(Token::Value _operator, Typ
value = rational(denominator, numerator);
break;
}
case Token::SHL:
{
using boost::multiprecision::pow;
if (fractional)
return TypePointer();
else if (abs(other.m_value) > numeric_limits<uint32_t>::max())
return TypePointer();
uint32_t exponent = abs(other.m_value).numerator().convert_to<uint32_t>();
value = m_value.numerator() * pow(bigint(2), exponent);
break;
}
case Token::SHR:
{
using boost::multiprecision::pow;
if (fractional)
return TypePointer();
else if (abs(other.m_value) > numeric_limits<uint32_t>::max())
return TypePointer();
uint32_t exponent = abs(other.m_value).numerator().convert_to<uint32_t>();
value = rational(m_value.numerator() / pow(bigint(2), exponent), 1);
break;
}
default:
return TypePointer();
}