cerc-io/solidity
11
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[SMTChecker] Support type(T).min and type(T).max

Browse Source
This commit is contained in:
Alex Beregszaszi
2020-09-11 21:37:51 +01:00
parent 72f8a753a9
commit 961a199cf5
4 changed files with 122 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libsolidity/formal/SMTEncoder.cpp
+18 -3
View File
@@ -881,16 +881,31 @@ bool SMTEncoder::visit(MemberAccess const& _memberAccess)
auto identifier = dynamic_cast<Identifier const*>(&_memberAccess.expression());
if (exprType->category() == Type::Category::Magic)
{
string accessedName;
if (identifier)
accessedName = identifier->name();
defineGlobalVariable(identifier->name() + "." + _memberAccess.memberName(), _memberAccess);
else if (auto magicType = dynamic_cast<MagicType const*>(exprType); magicType->kind() == MagicType::Kind::MetaType)
{
auto const& memberName = _memberAccess.memberName();
if (memberName == "min" || memberName == "max")
{
IntegerType const& integerType = dynamic_cast<IntegerType const&>(*magicType->typeArgument());
defineExpr(_memberAccess, memberName == "min" ? integerType.minValue() : integerType.maxValue());
}
else
// NOTE: supporting name, creationCode, runtimeCode would be easy enough, but the bytes/string they return are not
// at all useable in the SMT checker currently
m_errorReporter.warning(
7507_error,
_memberAccess.location(),
"Assertion checker does not yet support this expression."
);
}
else
m_errorReporter.warning(
9551_error,
_memberAccess.location(),
"Assertion checker does not yet support this expression."
);
defineGlobalVariable(accessedName + "." + _memberAccess.memberName(), _memberAccess);
return false;
}
else if (smt::isNonRecursiveStruct(*exprType))