private static IMethodSymbol FindSetPropertyMethod(this INamedTypeSymbol classSymbol, CommonCompilation compilation)
{
// Find SetProperty<T>(ref T, T, string) method.
var setPropertyMethod = classSymbol
.GetMembers("SetProperty")
.OfType <IMethodSymbol>()
.FirstOrDefault(m => m.Parameters.Count == 3 && m.TypeParameters.Count == 1);
if (setPropertyMethod != null)
{
var parameters = setPropertyMethod.Parameters;
var typeParameter = setPropertyMethod.TypeParameters[0];
var stringType = compilation.GetSpecialType(SpecialType.System_String);
if (setPropertyMethod.ReturnsVoid &&
parameters[0].RefKind == RefKind.Ref &&
parameters[0].Type.Equals(typeParameter) &&
parameters[1].Type.Equals(typeParameter) &&
parameters[2].Type.Equals(stringType))
{
return(setPropertyMethod);
}
}
return(null);
}
internal static IMethodSymbol GenerateSetPropertyMethod(CommonCompilation compilation)
{
var body = Syntax.ParseStatement(
@"if (!System.Collections.Generic.EqualityComparer<T>.Default.Equals(field, value))
{
field = value;
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new System.ComponentModel.PropertyChangedEventArgs(name));
}
}");
body = body.WithAdditionalAnnotations(CodeAnnotations.Simplify);
var stringType = compilation.GetSpecialType(SpecialType.System_String);
var voidType = compilation.GetSpecialType(SpecialType.System_Void);
var typeParameter = SymbolFactory.CreateTypeParameter("T");
var parameter1 = SymbolFactory.CreateParameter(
attributes: null,
refKind: RefKind.Ref,
isParams: false,
type: typeParameter,
name: "field");
var parameter2 = SymbolFactory.CreateParameter(typeParameter, "value");
var parameter3 = SymbolFactory.CreateParameter(stringType, "name");
return(SymbolFactory.CreateMethod(
attributes: null,
accessibility: CommonAccessibility.Private,
modifiers: new SymbolModifiers(),
returnType: voidType,
explicitInterfaceSymbolOpt: null,
name: "SetProperty",
typeParameters: new[] { typeParameter },
parameters: new[] { parameter1, parameter2, parameter3 },
statements: new[] { body }));
}
internal static IMethodSymbol GenerateSetPropertyMethod(CommonCompilation compilation)
{
var body = Syntax.ParseStatement(
@"if (!System.Collections.Generic.EqualityComparer<T>.Default.Equals(field, value))
{
field = value;
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new System.ComponentModel.PropertyChangedEventArgs(name));
}
}");
body = body.WithAdditionalAnnotations(CodeAnnotations.Simplify);
var stringType = compilation.GetSpecialType(SpecialType.System_String);
var voidType = compilation.GetSpecialType(SpecialType.System_Void);
var typeParameter = SymbolFactory.CreateTypeParameter("T");
var parameter1 = SymbolFactory.CreateParameter(
attributes: null,
refKind: RefKind.Ref,
isParams: false,
type: typeParameter,
name: "field");
var parameter2 = SymbolFactory.CreateParameter(typeParameter, "value");
var parameter3 = SymbolFactory.CreateParameter(stringType, "name");
return SymbolFactory.CreateMethod(
attributes: null,
accessibility: CommonAccessibility.Private,
modifiers: new SymbolModifiers(),
returnType: voidType,
explicitInterfaceSymbolOpt: null,
name: "SetProperty",
typeParameters: new[] { typeParameter },
parameters: new[] { parameter1, parameter2, parameter3 },
statements: new[] { body });
}
private static IMethodSymbol FindSetPropertyMethod(this INamedTypeSymbol classSymbol, CommonCompilation compilation)
{
// Find SetProperty<T>(ref T, T, string) method.
var setPropertyMethod = classSymbol
.GetMembers("SetProperty")
.OfType<IMethodSymbol>()
.FirstOrDefault(m => m.Parameters.Count == 3 && m.TypeParameters.Count == 1);
if (setPropertyMethod != null)
{
var parameters = setPropertyMethod.Parameters;
var typeParameter = setPropertyMethod.TypeParameters[0];
var stringType = compilation.GetSpecialType(SpecialType.System_String);
if (setPropertyMethod.ReturnsVoid &&
parameters[0].RefKind == RefKind.Ref &&
parameters[0].Type.Equals(typeParameter) &&
parameters[1].Type.Equals(typeParameter) &&
parameters[2].Type.Equals(stringType))
{
return setPropertyMethod;
}
}
return null;
}
