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Merge pull request #6657 from ethereum/smt_tuple_multi_decl

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[SMTChecker] Support tuples as multi var decl
This commit is contained in:
chriseth
2019-05-07 17:55:36 +02:00
committed by GitHub
parent 7ab8cc60c9 3c7540ceb2
commit 6c9c54a657
10 changed files with 83 additions and 12 deletions
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libsolidity/formal/SMTChecker.cpp
+21 -6
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@@ -330,20 +330,35 @@ bool SMTChecker::visit(ForStatement const& _node)
void SMTChecker::endVisit(VariableDeclarationStatement const& _varDecl)
{
if (_varDecl.declarations().size() != 1)
m_errorReporter.warning(
_varDecl.location(),
"Assertion checker does not yet support such variable declarations."
);
else if (knownVariable(*_varDecl.declarations()[0]))
{
if (auto init = _varDecl.initialValue())
{
auto symbTuple = dynamic_pointer_cast<SymbolicTupleVariable>(m_expressions[init]);
/// symbTuple == nullptr if it is the return of a non-inlined function call.
if (symbTuple)
{
auto const& components = symbTuple->components();
auto const& declarations = _varDecl.declarations();
for (unsigned i = 0; i < declarations.size(); ++i)
{
solAssert(components.at(i), "");
if (declarations.at(i) && knownVariable(*declarations.at(i)))
assignment(*declarations.at(i), components.at(i)->currentValue(), declarations.at(i)->location());
}
}
}
}
else if (knownVariable(*_varDecl.declarations().front()))
{
if (_varDecl.initialValue())
assignment(*_varDecl.declarations()[0], *_varDecl.initialValue(), _varDecl.location());
assignment(*_varDecl.declarations().front(), *_varDecl.initialValue(), _varDecl.location());
}
else
m_errorReporter.warning(
_varDecl.location(),
"Assertion checker does not yet implement such variable declarations."
);
}
void SMTChecker::endVisit(Assignment const& _assignment)