public static CodeWriter WriteInitialization(this CodeWriter writer, ObjectType objectType, IEnumerable <ObjectPropertyInitializer> initializers)
{
ObjectPropertyInitializer?FindInitializerForParameter(ObjectTypeConstructor constructor, Parameter constructorParameter)
{
var property = constructor.FindPropertyInitializedByParameter(constructorParameter);
return(initializers.SingleOrDefault(i => i.Property == property));
}
// Checks if constructor parameters can be satisfied by the provided initializer list
List <ObjectPropertyInitializer>?TryGetParameters(ObjectTypeConstructor constructor)
{
List <ObjectPropertyInitializer> constructorInitializers = new List <ObjectPropertyInitializer>();
foreach (var constructorParameter in constructor.Parameters)
{
var objectPropertyInitializer = FindInitializerForParameter(constructor, constructorParameter);
if (objectPropertyInitializer == null)
{
return(null);
}
constructorInitializers.Add(objectPropertyInitializer);
}
return(constructorInitializers);
}
// Find longest satisfiable ctor
List <ObjectPropertyInitializer>?selectedCtorInitializers = null;
foreach (var constructor in objectType.Constructors)
{
var newInitializers = TryGetParameters(constructor);
if (newInitializers != null &&
newInitializers.Count > (selectedCtorInitializers?.Count ?? -1))
{
selectedCtorInitializers = newInitializers;
}
}
Debug.Assert(selectedCtorInitializers != null);
writer.Append($"new {objectType.Type}(");
foreach (var initializer in selectedCtorInitializers)
{
writer.WriteReferenceOrConstant(initializer.Value);
writer.WriteConversion(initializer.Value.Type, initializer.Property.Declaration.Type);
writer.Append($", ");
}
writer.RemoveTrailingComma();
writer.Append($")");
// Find properties that would have to be initialized via property initializers
var restOfInitializers = initializers.Except(selectedCtorInitializers).ToArray();
if (restOfInitializers.Any())
{
using (writer.Scope($"", newLine: false))
{
foreach (var propertyInitializer in restOfInitializers)
{
writer.Append($"{propertyInitializer.Property.Declaration.Name} = ")
.WriteReferenceOrConstant(propertyInitializer.Value);
writer.WriteConversion(propertyInitializer.Value.Type, propertyInitializer.Property.Declaration.Type);
writer.Line($",");
}
writer.RemoveTrailingComma();
}
}
return(writer);
}
