//generation
private static bool isService(ClassDeclarationSyntax @class, ExcessCompilation compilation, Scope scope)
{
if (!isConcurrentClass(@class, compilation, scope))
{
var isFunctionClass = @class.Identifier.ToString() == "Functions" && Roslyn.IsStatic(@class);
if (isFunctionClass)
{
return(@class.ChildNodes()
.OfType <MethodDeclarationSyntax>()
.Any(method => method
.AttributeLists
.Any(attrList => attrList
.Attributes
.Any(attr => attr.Name.ToString() == "route"))));
}
return(false);
}
return(@class
.AttributeLists
.Any(attrList => attrList
.Attributes
.Any(attr => attr.Name.ToString() == "Service")));
}
public override SyntaxNode VisitMethodDeclaration(MethodDeclarationSyntax node)
{
if (_class.IsSignal(node))
{
_isStatic = Roslyn.IsStatic(node);
return(base.VisitMethodDeclaration(node));
}
return(node);
}
private static MethodDeclarationSyntax concurrentMethod(Class ctx, MethodDeclarationSyntax method, bool forever = false, bool asVirtual = false)
{
var name = method.Identifier.ToString();
var body = method.Body;
var returnStatements = body
.DescendantNodes()
.OfType <ReturnStatementSyntax>();
var lastReturn = body.Statements.LastOrDefault() as ReturnStatementSyntax;
if (returnStatements.Any())
{
body = body
.ReplaceNodes(returnStatements,
(on, nn) => Templates
.ExpressionReturn
.Get <StatementSyntax>(nn.Expression == null || nn.Expression.IsMissing
? Roslyn.@null
: nn.Expression,
Roslyn.Quoted(method.Identifier.ToString())));
}
if (forever)
{
body = CSharp.Block(
CSharp.ForStatement(body));
}
else if (lastReturn == null)
{
body = body.AddStatements(Templates
.ExpressionReturn
.Get <StatementSyntax>(
Roslyn.@null,
Roslyn.Quoted(method.Identifier.ToString())));
}
var result = Templates
.ConcurrentMethod
.Get <MethodDeclarationSyntax>("__concurrent" + name);
result = result
.WithParameterList(method
.ParameterList
.AddParameters(result
.ParameterList
.Parameters
.ToArray()))
.WithBody(body);
if (asVirtual)
{
result = result
.WithModifiers(CSharp.TokenList(
CSharp.Token(SyntaxKind.ProtectedKeyword),
CSharp.Token(SyntaxKind.VirtualKeyword)));
}
if (Roslyn.IsStatic(method))
{
result = result.AddModifiers(CSharp.Token(SyntaxKind.StaticKeyword));
}
ctx.AddMember(result);
return(result);
}
private static bool compileMethod(MethodDeclarationSyntax methodDeclaration, Class ctx, Scope scope, Options options, bool isSingleton)
{
var method = methodDeclaration;
var name = method.Identifier.ToString();
var isMain = name == "main";
var isProtected = method
.Modifiers
.Where(m => m.Kind() == SyntaxKind.ProtectedKeyword)
.Any();
var isVisible = isProtected || Roslyn.IsVisible(method);
var isStatic = Roslyn.IsStatic(method);
var hasReturnType = method.ReturnType.ToString() != "void";
var returnType = hasReturnType
? method.ReturnType
: Roslyn.boolean;
var isEmptySignal = method.Body == null ||
method.Body.IsMissing;
if (isEmptySignal)
{
if (method.ParameterList.Parameters.Count > 0)
{
scope.AddError("concurrent03", "empty signals cannot contain parameters", method);
}
if (method.ReturnType.ToString() != "void")
{
scope.AddError("concurrent04", "empty signals cannot return values", method);
}
method = method
.WithSemicolonToken(CSharp.MissingToken(SyntaxKind.SemicolonToken))
.WithBody(CSharp.Block());
}
var cc = parseConcurrentBlock(ctx, method.Body, scope, isStatic);
if (cc != null)
{
method = method.WithBody(cc);
}
//remove attributes, until needed
method = method.WithAttributeLists(CSharp.List <AttributeListSyntax>());
if (isMain)
{
if (ctx.HasMain)
{
scope.AddError("concurrent06", "multiple main methods", method);
return(false);
}
ctx.HasMain = true;
var statements = method.Body.Statements;
var isContinued = (cc == null) && checkContinued(statements);
if (isContinued)
{
method = method
.WithBody(CSharp.Block(statements
.Take(statements.Count - 1)));
}
var mainMethod = concurrentMethod(ctx, method);
//hook up our start method
int currentIndex = 0;
ctx.Replace(methodDeclaration, Templates
.StartObject
.Get <MethodDeclarationSyntax>(Templates
.ConcurrentMain
.Get <InvocationExpressionSyntax>()
.WithArgumentList(CSharp.ArgumentList(CSharp.SeparatedList(
mainMethod
.ParameterList
.Parameters
.Where(param => param.Identifier.ToString() != "__cancellation" &&
param.Identifier.ToString() != "__success" &&
param.Identifier.ToString() != "__failure")
.Select(param => CSharp.Argument(Templates
.StartObjectArgument
.Get <ExpressionSyntax>(
param.Type,
currentIndex++)))
.Union(new[] {
CSharp.Argument(Templates.NullCancelationToken),
CSharp.Argument(Roslyn.@null),
CSharp.Argument(Roslyn.@null),
}))))));
return(false);
}
if (isVisible)
{
if (isEmptySignal)
{
Debug.Assert(!isStatic); //td: error
ctx.AddMember(Templates
.EmptySignalMethod
.Get <MethodDeclarationSyntax>(
"__concurrent" + name,
Roslyn.Quoted(name),
isProtected ? Roslyn.@true : Roslyn.@false));
}
else
{
concurrentMethod(ctx, method, asVirtual: options.GenerateRemote);
}
}
else if (cc != null)
{
concurrentMethod(ctx, method);
}
else if (isEmptySignal)
{
ctx.AddMember(Templates
.EmptySignalMethod
.Get <MethodDeclarationSyntax>(
"__concurrent" + name,
Roslyn.Quoted(name),
isProtected? Roslyn.@true : Roslyn.@false));
}
else
{
return(false);
}
var signal = ctx.AddSignal(name, returnType, isVisible, isStatic);
if (isVisible)
{
method = createPublicSignals(ctx, method, signal, isSingleton);
if (isSingleton)
{
ctx.Replace(methodDeclaration, method);
}
}
else
{
ctx.Replace(methodDeclaration, method
.WithBody(CSharp.Block()
.WithStatements(CSharp.List(new[] {
isEmptySignal
? Templates.SignalDispatcher.Get <StatementSyntax>(Roslyn.Quoted(method.Identifier.ToString()))
: Templates.PrivateSignal
}))));
return(false);
}
return(true);
}
