private AnnotationExpression(AnnotationExpressionKind kind, object value, Position position = default)
{
CheckValueType(kind, value);
Kind = kind;
Value = value;
Position = position;
}
private static void CheckValueType(AnnotationExpressionKind kind, object value)
{
if (value == null)
{
if (kind == AnnotationExpressionKind.Null)
{
return;
}
System.Diagnostics.Debug.Fail($"wrong value 'null' for Expression kind '{kind}' ");
}
var type = value.GetType();
switch (kind)
{
case AnnotationExpressionKind.Array:
if (typeof(IReadOnlyCollection <AnnotationExpression>).IsAssignableFrom(type))
{
return;
}
break;
case AnnotationExpressionKind.Object:
if (typeof(IReadOnlyCollection <ExpressionProperty>).IsAssignableFrom(type))
{
return;
}
break;
default:
if (_kinds.TryGetValue(kind, out var expected) && expected == Type.GetTypeCode(type))
{
return;
}
break;
}
System.Diagnostics.Debug.Fail($"value has wrong type '{type} for Expression kind '{kind}' ");
}
