internal override Expression ResolveEntityNames(ParserContext parser)
{
this.BatchExpressionEntityNameResolver(parser, this.Args);
// TODO: localize or create a dummy stub in Core
if (this.Name == "List")
{
return(new ListDefinition(this.FirstToken, new List <Expression>(), this.Generics[0], this.Owner, false, null));
}
else if (this.Name == "Dictionary")
{
return(new DictionaryDefinition(
this.FirstToken,
this.Generics[0], this.Generics[1],
new List <Expression>(), new List <Expression>(),
this.Owner));
}
this.Class = this.FileScope.DoClassLookup(this.Owner, this.NameToken, this.Name);
if (this.Class == null)
{
throw new ParserException(this, "No class named '" + this.Name + "'");
}
if (this.Class.Modifiers.HasStatic)
{
throw new ParserException(this, "Cannot instantiate a static class.");
}
Node.EnsureAccessIsAllowed(this.FirstToken, this.Owner, this.Class);
if (!Node.IsAccessAllowed(this.Owner, this.Class.Constructor))
{
// TODO: word this better. Maybe just say "this class' constructor is marked as private/protected/etc"
throw new ParserException(this.FirstToken, "This class' constructor's access modifier does not allow it to be constructed here.");
}
this.ConstructorReference = this.Class.Constructor;
int minArgCount = 0;
int maxArgCount = 0;
bool isPrivate = false;
if (this.ConstructorReference != null)
{
minArgCount = this.ConstructorReference.MinArgCount;
maxArgCount = this.ConstructorReference.MaxArgCount;
isPrivate = this.ConstructorReference.Annotations.IsPrivate();
}
if (isPrivate)
{
bool isValidUsage =
this.Class == this.Owner || // used in a field where the owner is the class directly
this.Class == this.Owner.Owner; // used in a function where the owner is the method whose owner is the class.
if (!isValidUsage)
{
throw new ParserException(this, "The constructor for " + this.Class.NameToken.Value + " is private and cannot be invoked from outside the class.");
}
}
if (this.Args.Length < minArgCount ||
this.Args.Length > maxArgCount)
{
string message = "This constructor has the wrong number of arguments. ";
if (minArgCount == maxArgCount)
{
message += "Expected " + minArgCount + " but found " + this.Args.Length;
}
else if (this.Args.Length < minArgCount)
{
message += " At least " + minArgCount + " are required but found only " + this.Args.Length + ".";
}
else
{
message += " At most " + maxArgCount + " are allowed but found " + this.Args.Length + ".";
}
throw new ParserException(this, message);
}
return(this);
}
internal override Expression ResolveEntityNames(
ParserContext parser)
{
FunctionDefinition funcDef; // used in multiple places.
FieldDefinition fieldDec;
this.Root = this.Root.ResolveEntityNames(parser);
Expression root = this.Root;
string field = this.FieldToken.Value;
if (root is NamespaceReference)
{
// already a fully qualified namespace, therefore imports don't matter.
string fullyQualifiedName = ((NamespaceReference)root).Template.Name + "." + field;
TopLevelEntity entity = this.Owner.FileScope.FileScopeEntityLookup.DoEntityLookup(fullyQualifiedName, parser.CurrentCodeContainer);
if (entity != null)
{
return(ResolverPipeline.ConvertStaticReferenceToExpression(entity, this.FirstToken, this.Owner));
}
NamespaceReferenceTemplate nrt = this.Owner.FileScope.FileScopeEntityLookup.DoNamespaceLookup(fullyQualifiedName, parser.CurrentCodeContainer);
if (nrt != null)
{
return(new NamespaceReference(this.FirstToken, this.Owner, nrt));
}
throw new ParserException(this, "Could not find class or function by the name of: '" + fullyQualifiedName + "'");
}
if (root is ClassReference)
{
ClassDefinition cd = ((ClassReference)root).ClassDefinition;
funcDef = cd.GetMethod(field, false);
if (funcDef != null)
{
if (!funcDef.Modifiers.HasStatic)
{
string className = cd.NameToken.Value;
string functionName = funcDef.NameToken.Value;
throw new ParserException(this.DotToken, "'" + className + "." + functionName + "' is not a static method, but it is being used as though it is static.");
}
Node.EnsureAccessIsAllowed(this.FieldToken, this.Owner, funcDef);
return(new FunctionReference(this.FirstToken, funcDef, this.Owner));
}
fieldDec = cd.GetField(field, false);
if (fieldDec != null)
{
if (!fieldDec.Modifiers.HasStatic)
{
throw new ParserException(this.DotToken, "Cannot make a static reference to a non-static field.");
}
Node.EnsureAccessIsAllowed(this.FieldToken, this.Owner, fieldDec);
return(new FieldReference(this.FirstToken, fieldDec, this.Owner));
}
// TODO: typeof(class name) is less error prone with localization conflicts.
// However there's a Core.typeOf() method that sort of conflicts.
// TODO: if this notation is kept, then this needs to be split into two class keywords
// since they do different things.
if (field == parser.Keywords.CLASS)
{
return(new ClassReferenceLiteral(this.FirstToken, cd, this.Owner));
}
// TODO: nested classes, enums, constants
// TODO: show spelling suggestions.
throw new ParserException(this.FieldToken, "No static fields or methods named '" + field + "' on the class " + cd.NameToken.Value + ".");
}
if (root is BaseKeyword)
{
ClassDefinition thisClass = null;
if (this.Owner != null)
{
if (this.Owner is FunctionDefinition)
{
thisClass = this.Owner.Owner as ClassDefinition;
}
else
{
thisClass = this.Owner as ClassDefinition;
}
}
if (thisClass == null)
{
throw new ParserException(root, "'base' keyword can only be used inside classes.");
}
ClassDefinition cd = thisClass.BaseClass;
if (cd == null)
{
throw new ParserException(root, "'base' keyword can only be used inside classes that extend from another class.");
}
FunctionDefinition fd = cd.GetMethod(field, true);
if (fd == null)
{
throw new ParserException(this.DotToken, "Cannot find a method by that name in the base class chain.");
}
if (fd.Modifiers.HasStatic)
{
throw new ParserException(this.DotToken, "Cannot reference static methods using 'base' keyword.");
}
Node.EnsureAccessIsAllowed(this.DotToken, this.Owner, fd);
return(new BaseMethodReference(this.FirstToken, this.DotToken, this.FieldToken, this.Owner));
}
if (root is ThisKeyword)
{
ClassDefinition cd = null;
TopLevelEntity owner = this.TopLevelEntity;
if (owner is FunctionDefinition)
{
FunctionDefinition functionOwner = (FunctionDefinition)owner;
if (functionOwner.Modifiers.HasStatic)
{
throw new ParserException(this.Root, "'this' keyword cannot be used in static methods.");
}
if (!(functionOwner.Owner is ClassDefinition))
{
throw new ParserException(this.Root, "'this' keyword cannot be used in a function that isn't in a class.");
}
cd = (ClassDefinition)owner.Owner;
}
else if (owner is FieldDefinition)
{
if (((FieldDefinition)owner).Modifiers.HasStatic)
{
throw new ParserException(this.Root, "'this' keyword cannot be used in static fields.");
}
cd = (ClassDefinition)owner.Owner;
}
else if (owner is ConstructorDefinition)
{
if (((ConstructorDefinition)owner).Modifiers.HasStatic)
{
throw new ParserException(this.Root, "'this', keyword cannot be used in static constructors.");
}
cd = (ClassDefinition)owner.Owner;
}
else
{
throw new ParserException(this.Root, "'this' keyword must be used inside a class.");
}
funcDef = cd.GetMethod(field, true);
if (funcDef != null)
{
if (funcDef.Modifiers.HasStatic)
{
throw new ParserException(this.DotToken, "This method is static and must be referenced by the class name, not 'this'.");
}
Node.EnsureAccessIsAllowed(this.DotToken, this.Owner, funcDef);
return(new FunctionReference(this.FirstToken, funcDef, this.Owner));
}
FieldDefinition fieldDef = cd.GetField(field, true);
if (fieldDef != null)
{
if (fieldDef.Modifiers.HasStatic)
{
throw new ParserException(this.DotToken, "This field is static and must be referenced by the class name, not 'this'.");
}
Node.EnsureAccessIsAllowed(this.DotToken, this.Owner, fieldDef);
return(new FieldReference(this.FirstToken, fieldDef, this.Owner));
}
// TODO: show suggestions in the error message for anything close to what was typed.
throw new ParserException(this.FieldToken, "The class '" + cd.NameToken.Value + "' does not have a field named '" + field + "'.");
}
if (this.Root is EnumReference)
{
EnumDefinition enumDef = ((EnumReference)this.Root).EnumDefinition;
if (field == parser.Keywords.FIELD_ENUM_LENGTH)
{
return(new IntegerConstant(this.FirstToken, enumDef.Items.Length, this.Owner));
}
if (field == parser.Keywords.FIELD_ENUM_MAX)
{
return(new SpecialEntity.EnumMaxFunction(this.FirstToken, enumDef, this.Owner));
}
if (field == parser.Keywords.FIELD_ENUM_VALUES)
{
return(new SpecialEntity.EnumValuesFunction(this.FirstToken, enumDef, this.Owner));
}
return(new EnumFieldReference(this.FirstToken, enumDef, this.FieldToken, this.Owner));
}
// This is done here in the resolver instead of the parser because some unallowed
// field names (such as .class) are valid.
if (field == parser.Keywords.CLASS)
{
if (this.Root is Variable)
{
throw new ParserException(this.Root, "'" + ((Variable)this.Root).Name + "' is not a class.");
}
throw new ParserException(this.DotToken, ".class can only be applied to class names.");
}
parser.VerifyIdentifier(this.FieldToken);
return(this);
}