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| author | RJ <catalanor0220@gmail.com> | 2016-05-17 23:04:10 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2016-10-20 07:03:09 +0800 |
| commit | 48f20289115183ce48bc2df8116069f7460fe9e8 (patch) | |
| tree | 8fb40c6ad1c648c787047184a3e1cd23d3f25e14 /libsolidity | |
| parent | 2bb37f8203d5b64f603d4c7c802407a5500429b5 (diff) | |
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Support shifting constants
Diffstat (limited to 'libsolidity')
| -rw-r--r-- | libsolidity/ast/Types.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/libsolidity/ast/Types.cpp b/libsolidity/ast/Types.cpp index 068cc138..a6c73953 100644 --- a/libsolidity/ast/Types.cpp +++ b/libsolidity/ast/Types.cpp @@ -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(); } |