public static void Go(ScalaWriter writer, MethodDeclarationSyntax method)
{
if (method.Modifiers.Any(SyntaxKind.PartialKeyword) && method.Body == null)
{
//We only want to render out one of the two partial methods. If there's another, skip this one.
if (TypeState.Instance.Partials.SelectMany(o => o.Syntax.As <ClassDeclarationSyntax>().Members)
.OfType <MethodDeclarationSyntax>()
.Except(method)
.Where(o => o.Identifier.ValueText == method.Identifier.ValueText)
.Any())
{
return;
}
}
var methodSymbol = Program.GetModel(method).GetDeclaredSymbol(method);
if (method.Identifier.ValueText == "GetEnumerator")
{
WriteGetEnumeratorFunction(writer, method, methodSymbol);
return;
}
writer.WriteIndent();
if (ShouldUseOverrideKeyword(method, methodSymbol))
{
writer.Write("override ");
}
if (method.Modifiers.Any(SyntaxKind.PrivateKeyword))
{
writer.Write("private ");
}
writer.Write("def ");
var methodName = OverloadResolver.MethodName(methodSymbol);
if (methodName == "ToString")
{
methodName = "toString";
}
else if (methodName == "Equals")
{
methodName = "equals";
}
else if (methodName == "GetHashCode")
{
methodName = "hashCode";
}
else if (methodName == "Main")
{
methodName = "main";
}
writer.Write(methodName);
if (method.TypeParameterList != null)
{
writer.Write("[");
writer.Write(string.Join(", ", method.TypeParameterList.Parameters.Select(o => TypeParameter(o, methodSymbol, method))));
writer.Write("]");
}
writer.Write("(");
var firstParam = true;
foreach (var parameter in method.ParameterList.Parameters)
{
bool isRef = parameter.Modifiers.Any(SyntaxKind.OutKeyword) || parameter.Modifiers.Any(SyntaxKind.RefKeyword);
if (firstParam)
{
firstParam = false;
}
else
{
writer.Write(", ");
}
writer.Write(WriteIdentifierName.TransformIdentifier(parameter.Identifier.ValueText));
if (isRef)
{
writer.Write(":CsRef[");
writer.Write(TypeProcessor.ConvertType(parameter.Type));
writer.Write("]");
Program.RefOutSymbols.TryAdd(Program.GetModel(method).GetDeclaredSymbol(parameter), null);
}
else
{
writer.Write(TypeProcessor.ConvertTypeWithColon(parameter.Type));
}
if (parameter.Default != null)
{
writer.Write(" = ");
Core.Write(writer, parameter.Default.Value);
}
}
writer.Write(")");
bool returnsVoid = method.ReturnType.ToString() == "void";
if (!returnsVoid)
{
writer.Write(TypeProcessor.ConvertTypeWithColon(method.ReturnType));
}
if (method.Modifiers.Any(SyntaxKind.AbstractKeyword) || method.Parent is InterfaceDeclarationSyntax)
{
writer.Write(";\r\n");
}
else
{
if (!returnsVoid)
{
writer.Write(" =");
}
writer.Write("\r\n");
writer.WriteOpenBrace();
if (method.Body != null)
{
foreach (var statement in method.Body.Statements)
{
Core.Write(writer, statement);
}
TriviaProcessor.ProcessTrivias(writer, method.Body.DescendantTrivia());
}
writer.WriteCloseBrace();
}
}
public static void Go(ScalaWriter writer, InvocationExpressionSyntax invocationExpression)
{
var model = Program.GetModel(invocationExpression);
var symbolInfo = model.GetSymbolInfo(invocationExpression);
var expressionSymbol = model.GetSymbolInfo(invocationExpression.Expression);
if (symbolInfo.Symbol == null)
{
throw new Exception("symbolInfo.Symbol null at " + Utility.Descriptor(invocationExpression));
}
if (symbolInfo.Symbol.OriginalDefinition == null)
{
throw new Exception("symbolInfo.Symbol.OriginalDefinition null at " + Utility.Descriptor(invocationExpression));
}
var methodSymbol = symbolInfo.Symbol.OriginalDefinition.As <IMethodSymbol>().UnReduce();
var translateOpt = MethodTranslation.Get(symbolInfo.Symbol.As <IMethodSymbol>());
var memberReferenceExpressionOpt = invocationExpression.Expression as MemberAccessExpressionSyntax;
var firstParameter = true;
var extensionNamespace = methodSymbol.IsExtensionMethod ? methodSymbol.ContainingNamespace.FullNameWithDot() + methodSymbol.ContainingType.Name : null; //null means it's not an extension method, non-null means it is
string methodName;
string typeParameters = null;
ExpressionSyntax subExpressionOpt;
if (methodSymbol.ContainingType.Name == "Enum")
{
if (methodSymbol.Name == "Parse")
{
WriteEnumParse(writer, invocationExpression);
return;
}
if (methodSymbol.Name == "TryParse")
{
WriteEnumTryParse(writer, invocationExpression);
return;
}
if (methodSymbol.Name == "GetValues")
{
WriteEnumGetValues(writer, invocationExpression);
return;
}
}
if (expressionSymbol.Symbol is IEventSymbol)
{
methodName = "Invoke"; //Would need to append the number of arguments to this to support events. However, events are not currently supported
}
else if (memberReferenceExpressionOpt != null && memberReferenceExpressionOpt.Expression is PredefinedTypeSyntax)
{
switch (methodSymbol.Name)
{
case "Parse":
if (invocationExpression.ArgumentList.Arguments.Count > 1)
{
throw new Exception("Multiple arguments to .Parse methods are not supported: " + Utility.Descriptor(invocationExpression));
}
Core.Write(writer, invocationExpression.ArgumentList.Arguments.Single().Expression);
writer.Write(".trim().to"); //we must trim strings before parsing them. In C#, a string like "4 " parses just fine, but if we don't trim this same string would false to parse in java
writer.Write(TypeProcessor.ConvertType(methodSymbol.ReturnType));
return;
case "TryParse":
methodName = "TryParse" + TypeProcessor.ConvertType(methodSymbol.Parameters[1].Type);
extensionNamespace = "CsScala";
break;
default:
methodName = methodSymbol.Name;
extensionNamespace = "CsScala";
break;
}
}
else if (translateOpt != null && translateOpt.ReplaceWith != null)
{
methodName = translateOpt.ReplaceWith;
}
else if (methodSymbol.MethodKind == MethodKind.DelegateInvoke)
{
methodName = null;
}
else
{
methodName = OverloadResolver.MethodName(methodSymbol);
}
if (translateOpt != null && translateOpt.HasComplexReplaceWith)
{
translateOpt.DoComplexReplaceWith(writer, memberReferenceExpressionOpt);
return;
}
if (translateOpt != null && translateOpt.SkipExtensionParameter)
{
subExpressionOpt = null;
}
else if (methodSymbol.MethodKind == MethodKind.DelegateInvoke)
{
subExpressionOpt = invocationExpression.Expression;
}
else if (memberReferenceExpressionOpt != null)
{
if (memberReferenceExpressionOpt.Expression is PredefinedTypeSyntax)
{
subExpressionOpt = null;
}
else
{
subExpressionOpt = memberReferenceExpressionOpt.Expression;
}
}
else
{
subExpressionOpt = null;
}
//When the code specifically names generic arguments, include them in the method name
var genNameExpression = invocationExpression.Expression as GenericNameSyntax;
if (genNameExpression == null && memberReferenceExpressionOpt != null)
{
genNameExpression = memberReferenceExpressionOpt.Name as GenericNameSyntax;
}
if (genNameExpression != null && genNameExpression.TypeArgumentList.Arguments.Count > 0)
{
typeParameters = "[" + string.Join(", ", genNameExpression.TypeArgumentList.Arguments.Select(TypeProcessor.ConvertType)) + "]";
}
//Determine if it's an extension method called in a non-extension way. In this case, just pretend it's not an extension method
if (extensionNamespace != null && subExpressionOpt != null && model.GetTypeInfo(subExpressionOpt).ConvertedType.ToString() == methodSymbol.ContainingNamespace + "." + methodSymbol.ContainingType.Name)
{
extensionNamespace = null;
}
if (translateOpt != null && !string.IsNullOrEmpty(translateOpt.ExtensionNamespace))
{
extensionNamespace = translateOpt.ExtensionNamespace;
}
else if (translateOpt != null && translateOpt.ExtensionNamespace == "")
{
extensionNamespace = null;
}
var memberType = memberReferenceExpressionOpt == null ? null : model.GetTypeInfo(memberReferenceExpressionOpt.Expression).Type;
var isNullableEnum = memberType != null && (memberType.Name == "Nullable" && memberType.ContainingNamespace.FullName() == "System") && memberType.As <INamedTypeSymbol>().TypeArguments.Single().TypeKind == TypeKind.Enum;
if (isNullableEnum && methodSymbol.Name == "ToString")
{
extensionNamespace = null; //override Translations.xml for nullable enums. We want them to convert to the enum's ToString method
methodName = "toString";
}
if (extensionNamespace != null)
{
writer.Write(extensionNamespace);
if (methodName != null)
{
writer.Write(".");
writer.Write(methodName);
}
WriteTypeParameters(writer, translateOpt, typeParameters, invocationExpression);
writer.Write("(");
if (subExpressionOpt != null)
{
firstParameter = false;
Core.Write(writer, subExpressionOpt);
}
}
else
{
if (memberReferenceExpressionOpt != null)
{
//Check against lowercase toString since it gets replaced with the lowered version before we get here
if (methodName == "toString")
{
if (memberType.TypeKind == TypeKind.Enum || isNullableEnum)
{
var enumType = memberType.TypeKind == TypeKind.Enum ? memberType : memberType.As <INamedTypeSymbol>().TypeArguments.Single();
//calling ToString() on an enum forwards to our enum's special ToString method
writer.Write(enumType.ContainingNamespace.FullNameWithDot());
writer.Write(WriteType.TypeName((INamedTypeSymbol)enumType));
writer.Write(".ToString(");
Core.Write(writer, memberReferenceExpressionOpt.Expression);
writer.Write(")");
if (invocationExpression.ArgumentList.Arguments.Count > 0)
{
throw new Exception("Enum's ToString detected with parameters. These are not supported " + Utility.Descriptor(invocationExpression));
}
return;
}
if (memberType.SpecialType == SpecialType.System_Byte)
{
//Calling ToString on a byte needs to take special care since it's signed in the JVM
writer.Write("System.CsScala.ByteToString(");
Core.Write(writer, memberReferenceExpressionOpt.Expression);
writer.Write(")");
if (invocationExpression.ArgumentList.Arguments.Count > 0)
{
throw new Exception("Byte's ToString detected with parameters. These are not supported " + Utility.Descriptor(invocationExpression));
}
return;
}
}
}
if (subExpressionOpt != null)
{
WriteMemberAccessExpression.WriteMember(writer, subExpressionOpt);
if (methodName != null)
{
writer.Write(".");
}
}
else if (methodSymbol.IsStatic && extensionNamespace == null)
{
writer.Write(methodSymbol.ContainingNamespace.FullNameWithDot());
writer.Write(WriteType.TypeName(methodSymbol.ContainingType));
writer.Write(".");
}
writer.Write(methodName);
WriteTypeParameters(writer, translateOpt, typeParameters, invocationExpression);
writer.Write("(");
}
bool inParams = false;
bool foundParamsArray = false;
foreach (var arg in TranslateParameters(translateOpt, invocationExpression.ArgumentList.Arguments, invocationExpression))
{
if (firstParameter)
{
firstParameter = false;
}
else
{
writer.Write(", ");
}
if (!inParams && IsParamsArgument(invocationExpression, arg.ArgumentOpt, methodSymbol))
{
foundParamsArray = true;
if (!TypeProcessor.ConvertType(model.GetTypeInfo(arg.ArgumentOpt.Expression).Type).StartsWith("Array["))
{
inParams = true;
writer.Write("Array(");
}
}
if (arg.ArgumentOpt != null &&
arg.ArgumentOpt.RefOrOutKeyword.Kind() != SyntaxKind.None &&
model.GetSymbolInfo(arg.ArgumentOpt.Expression).Symbol is IFieldSymbol)
{
throw new Exception("ref/out cannot reference fields, only local variables. Consider using ref/out on a local variable and then assigning it into the field. " + Utility.Descriptor(invocationExpression));
}
//When passing an argument by ref or out, leave off the .Value suffix
if (arg.ArgumentOpt != null && arg.ArgumentOpt.RefOrOutKeyword.Kind() != SyntaxKind.None)
{
WriteIdentifierName.Go(writer, arg.ArgumentOpt.Expression.As <IdentifierNameSyntax>(), true);
}
else
{
arg.Write(writer);
}
}
if (inParams)
{
writer.Write(")");
}
else if (!foundParamsArray && methodSymbol.Parameters.Any() && methodSymbol.Parameters.Last().IsParams)
{
writer.Write(", Array()"); //params method called without any params argument. Send an empty array.
}
writer.Write(")");
}