protected virtual TResult Transform(Expression expression)
{
return(expression switch
{
CallExpression call => Transform(call),
ConstantExpression constant => Transform(constant),
AccessorExpression accessor => Transform(accessor),
AmbientPropertyExpression property => Transform(property),
LambdaExpression lambda => Transform(lambda),
ParameterExpression parameter => Transform(parameter),
IndexerWildcardExpression wildcard => Transform(wildcard),
ArrayExpression array => Transform(array),
ObjectExpression obj => Transform(obj),
IndexerExpression indexer => Transform(indexer),
IndexOfMatchExpression match => Transform(match),
null => throw new ArgumentNullException(nameof(expression)),
// Non-exhaustive because `InternalsVisibleTo` is applied to the assembly.
_ => throw new NotSupportedException($"{expression} is not supported.")
});
protected override ExpressionBody Transform(AmbientPropertyExpression px)
{
if (px.IsBuiltIn)
{
if (px.PropertyName == BuiltInProperty.Level)
{
return(Splice(context => new ScalarValue(context.Level)));
}
if (px.PropertyName == BuiltInProperty.Message)
{
return(Splice(context => new ScalarValue(Intrinsics.RenderMessage(context))));
}
if (px.PropertyName == BuiltInProperty.Exception)
{
return(Splice(context => context.Exception == null ? null : new ScalarValue(context.Exception)));
}
if (px.PropertyName == BuiltInProperty.Timestamp)
{
return(Splice(context => new ScalarValue(context.Timestamp)));
}
if (px.PropertyName == BuiltInProperty.MessageTemplate)
{
return(Splice(context => new ScalarValue(context.MessageTemplate.Text)));
}
if (px.PropertyName == BuiltInProperty.Properties)
{
return(Splice(context => new StructureValue(context.Properties.Select(kvp => new LogEventProperty(kvp.Key, kvp.Value)), null)));
}
return(LX.Constant(null, typeof(LogEventPropertyValue)));
}
var propertyName = px.PropertyName;
return(Splice(context => Intrinsics.GetPropertyValue(context, propertyName)));
}
protected override Expression Transform(AmbientPropertyExpression px)
{
return(px);
}
protected override IndexerExpression?Transform(AmbientPropertyExpression px)
{
return(null);
}
