public void Execute(GeneratorExecutionContext context)
{
try
{
var receiver = context.SyntaxReceiver as SyntaxReceiver;
if (receiver == null)
{
return;
}
foreach (var targetType in receiver.Targets)
{
var typeSymbol = context.Compilation.GetSemanticModel(targetType.SyntaxTree).GetDeclaredSymbol(targetType);
if (typeSymbol == null)
{
throw new Exception("can not get typeSymbol.");
}
var identifiers =
targetType.Members
.Where(x => x
.AttributeLists
.SelectMany(attribute => attribute.Attributes)
.Any(attribute => attribute.Name.ToString() is "Identifier" or "IdentifierAttribute"))
.ToArray();
// Identifierが複数していされた場合、エラーとするがエラーはSourceAnalyzerで処理するため
// こちらではIdentifierが一つしか存在しなかった場合のみ処理する。
if (identifiers.Length == 1)
{
var identifySymbol = context.Compilation.GetSemanticModel(identifiers[0].SyntaxTree).GetDeclaredSymbol(identifiers[0]);
var equalsTemplate = new EqualsTemplate
{
Namespace = typeSymbol.ContainingNamespace.ToDisplayString(),
TypeName = typeSymbol.Name,
PropertyName = identifySymbol?.Name
};
context.AddSource($"{equalsTemplate.Namespace}.{equalsTemplate.TypeName}.Partial.cs", GenerateSource(equalsTemplate));
// context.AddSource($"{equalsTemplate.Namespace}.{equalsTemplate.TypeName}.Partial.cs", equalsTemplate.TransformText());
}
}
}
catch (Exception e)
{
System.Diagnostics.Trace.WriteLine(e.ToString());
}
}
private string GenerateSource(EqualsTemplate equalsTemplate)
{
var stringBuilder = new StringBuilder();
stringBuilder.Append(@"namespace ");
stringBuilder.Append(equalsTemplate.Namespace);
stringBuilder.Append(@"
{
public partial class ");
stringBuilder.Append(equalsTemplate.TypeName);
stringBuilder.Append(@"
{
public override bool Equals(object other)
{
if(other is ");
stringBuilder.Append(equalsTemplate.TypeName);
stringBuilder.Append(" ");
stringBuilder.Append(equalsTemplate.TypeName.ToLower());
stringBuilder.Append(@")
{
return ");
stringBuilder.Append(equalsTemplate.PropertyName);
stringBuilder.Append(".Equals(");
stringBuilder.Append(equalsTemplate.TypeName.ToLower());
stringBuilder.Append(".");
stringBuilder.Append(equalsTemplate.PropertyName);
stringBuilder.Append(@");
}
return false;
}
}
}
");
return(stringBuilder.ToString());
}