StatementSyntax GeneratePropertySetterAssignment(GClass cl, GProperty prop, bool isObject, bool isNullable)
{
var code = @$ "
// Update the backing value
{PropertyBackingFieldName(prop)} = value;
// Register object for serialization in the next batch
{ChangedFieldsFieldName(cl)} |= {ChangedFieldsTypeName(cl)}.{prop.Name};
ExpressionSyntax ClientProperty(GClass c, GProperty p) => MemberAccess(ServerName(c.Name), CompositionPropertyField(p));
string CompositionPropertyField(GProperty prop) => "s_IdOf" + prop.Name + "Property";
string PropertyBackingFieldName(GProperty prop) => "_" + prop.Name.WithLowerFirst();
private ClassDeclarationSyntax GenerateClientProperty(ClassDeclarationSyntax client, GClass cl, GProperty prop,
TypeSyntax propType, bool isObject, bool isNullable)
{
var fieldName = PropertyBackingFieldName(prop);
return(client
.AddMembers(DeclareField(prop.Type, fieldName))
.AddMembers(PropertyDeclaration(propType, prop.Name)
.AddModifiers(prop.Internal ? SyntaxKind.InternalKeyword : SyntaxKind.PublicKeyword)
.AddAccessorListAccessors(
AccessorDeclaration(SyntaxKind.GetAccessorDeclaration,
Block(ReturnStatement(IdentifierName(fieldName)))),
AccessorDeclaration(SyntaxKind.SetAccessorDeclaration,
Block(
ParseStatement("var changed = false;"),
IfStatement(BinaryExpression(SyntaxKind.NotEqualsExpression,
IdentifierName(fieldName),
IdentifierName("value")),
Block(
ParseStatement("On" + prop.Name + "Changing();"),
ParseStatement("changed = true;"),
GeneratePropertySetterAssignment(cl, prop, isObject, isNullable))
),
ExpressionStatement(AssignmentExpression(SyntaxKind.SimpleAssignmentExpression,
IdentifierName(fieldName), IdentifierName("value"))),
ParseStatement($"if(changed) On" + prop.Name + "Changed();")
)).WithModifiers(TokenList(prop.InternalSet ? new[] { Token(SyntaxKind.InternalKeyword) } : Array.Empty <SyntaxToken>()))
))
.AddMembers(MethodDeclaration(ParseTypeName("void"), "On" + prop.Name + "Changed")
.AddModifiers(SyntaxKind.PartialKeyword).WithSemicolonToken(Semicolon()))
.AddMembers(MethodDeclaration(ParseTypeName("void"), "On" + prop.Name + "Changing")
.AddModifiers(SyntaxKind.PartialKeyword).WithSemicolonToken(Semicolon())));
}
