public bool TestUnderlyingType(Func <NIType, bool> underlyingTypePredicate, NIType expectedTypeExample)
{
if (!_terminalHasType)
{
return(false);
}
NIType underlyingType = _facadeVariable.Type.GetTypeOrReferentType();
if (!underlyingTypePredicate(underlyingType))
{
_terminal.SetDfirMessage(TerminalUserMessages.CreateTypeConflictMessage(underlyingType, expectedTypeExample));
return(false);
}
return(true);
}
public bool TestExpectedUnderlyingType(NIType expectedType)
{
if (!_terminalHasType)
{
return(false);
}
NIType underlyingType = _facadeVariable.Type.GetTypeOrReferentType();
if (underlyingType != expectedType)
{
_terminal.SetDfirMessage(TerminalUserMessages.CreateTypeConflictMessage(underlyingType, expectedType));
return(false);
}
return(true);
}
public void SetMessagesOnTerminal(Terminal terminal)
{
TerminalUnificationResult unificationResult;
if (!_unificationResults.TryGetValue(terminal, out unificationResult))
{
return;
}
if (unificationResult.TypeMismatch)
{
NIType expectedType = unificationResult.UnifyWith.RenderNIType();
NIType actualType = unificationResult.TerminalTypeVariable.RenderNIType();
terminal.SetDfirMessage(TerminalUserMessages.CreateTypeConflictMessage(actualType, expectedType));
}
if (unificationResult.ExpectedMutable)
{
terminal.SetDfirMessage(Messages.TerminalDoesNotAcceptImmutableType);
}
if (unificationResult.FailedConstraints != null)
{
foreach (var failedConstraint in unificationResult.FailedConstraints)
{
var traitConstraint = failedConstraint as TraitConstraint;
if (traitConstraint != null)
{
if (traitConstraint.TraitName == "Copy" && terminal.ParentNode is Wire)
{
terminal.ParentNode.SetDfirMessage(Messages.WireCannotFork);
}
else
{
terminal.SetDfirMessage(Messages.CreateTypeDoesNotHaveRequiredTraitMessage(((TraitConstraint)failedConstraint).TraitName));
}
}
else if (failedConstraint is OutlastsLifetimeGraphConstraint)
{
terminal.SetDfirMessage(Messages.WiredReferenceDoesNotLiveLongEnough);
}
else
{
throw new NotSupportedException("Don't know how to set a terminal DfirMessage for failed constraint " + failedConstraint.GetType().Name);
}
}
}
}
public void SetMessagesOnTerminal(Terminal terminal)
{
TerminalUnificationResult unificationResult;
if (!_unificationResults.TryGetValue(terminal, out unificationResult))
{
return;
}
if (unificationResult.TypeMismatch)
{
NIType expectedType = unificationResult.UnifyWith.RenderNIType();
NIType actualType = unificationResult.TerminalTypeVariable.RenderNIType();
terminal.SetDfirMessage(TerminalUserMessages.CreateTypeConflictMessage(actualType, expectedType));
}
if (unificationResult.ExpectedMutable)
{
terminal.SetDfirMessage(Messages.TerminalDoesNotAcceptImmutableType);
}
if (unificationResult.FailedConstraints != null)
{
if (unificationResult.FailedConstraints.OfType <CopyConstraint>().Any())
{
terminal.ParentNode.SetDfirMessage(Messages.WireCannotFork);
}
if (unificationResult.FailedConstraints.OfType <OutlastsLifetimeGraphConstraint>().Any())
{
terminal.SetDfirMessage(Messages.WiredReferenceDoesNotLiveLongEnough);
}
if (unificationResult.FailedConstraints.OfType <DisplayTraitConstraint>().Any() ||
unificationResult.FailedConstraints.OfType <IteratorTraitConstraint>().Any())
{
// TODO: customize message with name of missing trait
terminal.SetDfirMessage(Messages.TypeDoesNotHaveRequiredTrait);
}
}
}