private ProgramState HandleReferenceEqualsCall(InvocationExpressionSyntax invocation, ProgramState programState)
{
SymbolicValue arg1;
SymbolicValue arg2;
var newProgramState = programState
.PopValue(out arg1)
.PopValue(out arg2)
.PopValue();
var refEquals = new ReferenceEqualsSymbolicValue(arg1, arg2);
newProgramState = newProgramState.PushValue(refEquals);
return(SetConstraintOnReferenceEquals(refEquals, invocation, arg1, arg2, newProgramState));
}
private ProgramState SetConstraintOnReferenceEquals(ReferenceEqualsSymbolicValue refEquals, InvocationExpressionSyntax invocation,
SymbolicValue arg1, SymbolicValue arg2, ProgramState programState)
{
if (AreBothArgumentsNull(arg1, arg2, programState))
{
return(refEquals.SetConstraint(BoolConstraint.True, programState));
}
if (IsAnyArgumentNonNullValueType(invocation, arg1, arg2, programState) ||
ArgumentsHaveDifferentNullability(arg1, arg2, programState))
{
return(refEquals.SetConstraint(BoolConstraint.False, programState));
}
if (arg1 == arg2)
{
return(refEquals.SetConstraint(BoolConstraint.True, programState));
}
return(programState);
}
private ProgramState HandleReferenceEqualsCall(InvocationExpressionSyntax invocation, ProgramState programState)
{
SymbolicValue arg1;
SymbolicValue arg2;
var newProgramState = programState
.PopValue(out arg1)
.PopValue(out arg2)
.PopValue();
var refEquals = new ReferenceEqualsSymbolicValue(arg1, arg2);
newProgramState = newProgramState.PushValue(refEquals);
return SetConstraintOnReferenceEquals(refEquals, invocation, arg1, arg2, newProgramState);
}
private ProgramState SetConstraintOnReferenceEquals(ReferenceEqualsSymbolicValue refEquals, InvocationExpressionSyntax invocation,
SymbolicValue arg1, SymbolicValue arg2, ProgramState programState)
{
if (AreBothArgumentsNull(arg1, arg2, programState))
{
return refEquals.SetConstraint(BoolConstraint.True, programState);
}
if (IsAnyArgumentNonNullValueType(invocation, arg1, arg2, programState) ||
ArgumentsHaveDifferentNullability(arg1, arg2, programState))
{
return refEquals.SetConstraint(BoolConstraint.False, programState);
}
if (arg1 == arg2)
{
return refEquals.SetConstraint(BoolConstraint.True, programState);
}
return programState;
}