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);
}
internal override Expression ResolveNames(ParserContext parser)
{
if (this.Name == "$$$")
{
throw new ParserException(this.FirstToken, "Core function invocations cannot stand alone and must be immediately invoked.");
}
if (this.Name.StartsWith("$$"))
{
return(new LibraryFunctionReference(this.FirstToken, this.Name.Substring(2), this.Owner));
}
if (this.Name == "this" || this.Name == "base")
{
TopLevelConstruct container = parser.CurrentCodeContainer;
if (container is FunctionDefinition)
{
FunctionDefinition funcDef = (FunctionDefinition)this.Owner;
if (funcDef.IsStaticMethod)
{
throw new ParserException(this.FirstToken, "Cannot use '" + this.Name + "' in a static method");
}
if (funcDef.Owner == null)
{
throw new ParserException(this.FirstToken, "Cannot use '" + this.Name + "' in a function that isn't a class method.");
}
}
if (container is FieldDeclaration)
{
if (((FieldDeclaration)container).IsStaticField)
{
throw new ParserException(this.FirstToken, "Cannot use '" + this.Name + "' in a static field value.");
}
}
if (container is ConstructorDefinition)
{
ConstructorDefinition constructor = (ConstructorDefinition)container;
if (constructor == ((ClassDefinition)constructor.Owner).StaticConstructor) // TODO: This check is silly. Add an IsStatic field to ConstructorDefinition.
{
throw new ParserException(this.FirstToken, "Cannot use '" + this.Name + "' in a static constructor.");
}
}
if (this.Name == "this")
{
return(new ThisKeyword(this.FirstToken, this.Owner));
}
return(new BaseKeyword(this.FirstToken, this.Owner));
}
NamespaceReferenceTemplate nrt = this.Owner.FileScope.FileScopeEntityLookup.DoNamespaceLookup(this.Name, this.Owner);
if (nrt != null)
{
return(new NamespaceReference(this.FirstToken, this.Owner, nrt));
}
TopLevelConstruct exec = this.Owner.FileScope.FileScopeEntityLookup.DoEntityLookup(this.Name, this.Owner);
if (exec != null)
{
return(Resolver.ResolverPipeline.ConvertStaticReferenceToExpression(exec, this.FirstToken, this.Owner));
}
return(this);
}
internal override Expression ResolveTypes(ParserContext parser, TypeResolver typeResolver)
{
this.Root.ResolveTypes(parser, typeResolver);
string field = this.FieldToken.Value;
if (this.Root is EnumReference)
{
throw new System.NotImplementedException();
}
ResolvedType rootType = this.Root.ResolvedType;
// TODO: all of this needs to be localized.
switch (rootType.Category)
{
case ResolvedTypeCategory.NULL:
throw new ParserException(this.DotToken, "Cannot dereference a field from null.");
case ResolvedTypeCategory.ANY:
// ¯\_(ツ)_/¯
this.ResolvedType = ResolvedType.ANY;
return(this);
case ResolvedTypeCategory.INTEGER:
throw new ParserException(this.DotToken, "Integers do not have any fields.");
case ResolvedTypeCategory.FLOAT:
throw new ParserException(this.DotToken, "Floating point decimals do not have any fields.");
case ResolvedTypeCategory.BOOLEAN:
throw new ParserException(this.DotToken, "Booleans do not have any fields.");
case ResolvedTypeCategory.STRING:
switch (field)
{
case "length":
this.ResolvedType = ResolvedType.INTEGER;
if (this.Root is StringConstant)
{
return(new IntegerConstant(this.FirstToken, ((StringConstant)this.Root).Value.Length, this.Owner));
}
return(this);
case "contains": return(BuildPrimitiveMethod(ResolvedType.BOOLEAN, ResolvedType.STRING));
case "endsWith": return(BuildPrimitiveMethod(ResolvedType.BOOLEAN, ResolvedType.STRING));
case "indexOf": return(BuildPrimitiveMethod(ResolvedType.INTEGER, ResolvedType.STRING));
case "lower": return(BuildPrimitiveMethod(ResolvedType.STRING));
case "ltrim": return(BuildPrimitiveMethod(ResolvedType.STRING));
case "replace": return(BuildPrimitiveMethod(ResolvedType.STRING, ResolvedType.STRING, ResolvedType.STRING));
case "reverse": return(BuildPrimitiveMethod(ResolvedType.STRING));
case "rtrim": return(BuildPrimitiveMethod(ResolvedType.STRING));
case "split": return(BuildPrimitiveMethod(ResolvedType.ListOrArrayOf(ResolvedType.STRING), ResolvedType.STRING));
case "startsWith": return(BuildPrimitiveMethod(ResolvedType.BOOLEAN, ResolvedType.STRING));
case "trim": return(BuildPrimitiveMethod(ResolvedType.STRING));
case "upper": return(BuildPrimitiveMethod(ResolvedType.STRING));
// common mistakes
case "join":
throw new ParserException(this.DotToken, "Strings do not have a .join(list) method. Did you mean to do list.join(string)?");
case "size":
throw new ParserException(this.DotToken, "Strings do not have a .size() method. Did you mean to use .length?");
default:
throw new ParserException(this.DotToken, "Strings do not have that method.");
}
case ResolvedTypeCategory.LIST:
ResolvedType itemType = rootType.ListItemType;
switch (field)
{
case "length":
this.ResolvedType = ResolvedType.INTEGER;
return(this);
case "filter":
case "map":
if (this.CompilationScope.IsStaticallyTyped)
{
// TODO: for Acrylic, this needs to have a way to indicate that resolution should be attempted
// again once the function return type is known.
throw new System.NotImplementedException();
}
this.ResolvedType = ResolvedType.ANY;
return(this);
case "add": return(BuildPrimitiveMethod(ResolvedType.VOID, itemType));
case "choice": return(BuildPrimitiveMethod(ResolvedType.VOID));
case "clear": return(BuildPrimitiveMethod(ResolvedType.VOID));
case "clone": return(BuildPrimitiveMethod(rootType));
case "concat": return(BuildPrimitiveMethod(rootType, rootType));
case "contains": return(BuildPrimitiveMethod(ResolvedType.BOOLEAN, itemType));
case "insert": return(BuildPrimitiveMethod(ResolvedType.VOID, ResolvedType.INTEGER, itemType));
case "join": return(BuildPrimitiveMethodWithOptionalArgs(ResolvedType.STRING, 1, ResolvedType.STRING));
case "pop": return(BuildPrimitiveMethod(itemType));
case "remove": return(BuildPrimitiveMethod(ResolvedType.VOID, ResolvedType.INTEGER));
case "reverse": return(BuildPrimitiveMethod(ResolvedType.VOID));
case "shuffle": return(BuildPrimitiveMethod(ResolvedType.VOID));
case "sort": return(BuildPrimitiveMethod(ResolvedType.VOID));
// common mistakes
case "count":
case "size":
throw new ParserException(this.DotToken, "Lists do not have a ." + this.FieldToken.Value + "() method. Did you mean to use .length?");
default:
throw new ParserException(this.DotToken, "Lists do not have that method.");
}
case ResolvedTypeCategory.DICTIONARY:
ResolvedType keyType = rootType.DictionaryKeyType;
ResolvedType valueType = rootType.DictionaryValueType;
switch (field)
{
case "length":
this.ResolvedType = ResolvedType.INTEGER;
return(this);
case "clear": return(BuildPrimitiveMethod(ResolvedType.VOID));
case "clone": return(BuildPrimitiveMethod(rootType));
case "contains": return(BuildPrimitiveMethod(ResolvedType.BOOLEAN, keyType));
case "get": return(BuildPrimitiveMethodWithOptionalArgs(valueType, 1, keyType, valueType));
case "keys": return(BuildPrimitiveMethod(ResolvedType.ListOrArrayOf(keyType)));
case "merge": return(BuildPrimitiveMethod(ResolvedType.VOID, rootType));
case "remove": return(BuildPrimitiveMethod(ResolvedType.VOID, keyType));
case "values": return(BuildPrimitiveMethod(ResolvedType.ListOrArrayOf(valueType)));
default:
throw new ParserException(this.DotToken, "Dictionaries do not have that field.");
}
case ResolvedTypeCategory.CLASS_DEFINITION:
throw new ParserException(this.DotToken, "Class definitions do not have that field.");
case ResolvedTypeCategory.FUNCTION_POINTER:
switch (field)
{
case "invoke":
return(BuildPrimitiveMethod(ResolvedType.ANY, ResolvedType.ListOrArrayOf(ResolvedType.ANY)));
default:
throw new ParserException(this.DotToken, "Fucntions do not have that field.");
}
case ResolvedTypeCategory.INSTANCE:
FieldDefinition fieldDef = rootType.ClassTypeOrReference.GetField(field, true);
if (fieldDef != null)
{
if (!Node.IsAccessAllowed(this, fieldDef))
{
ClassDefinition cd = fieldDef.ClassOwner;
throw new ParserException(FieldToken, "The field '" + cd.NameToken.Value + "." + this.FieldToken.Value + "' is not accessible from here due to its access scope.");
}
this.ResolvedType = fieldDef.ResolvedFieldType;
return(this);
}
FunctionDefinition funcDef = rootType.ClassTypeOrReference.GetMethod(field, true);
if (funcDef != null)
{
this.ResolvedType = ResolvedType.GetFunctionType(funcDef);
return(this);
}
throw new ParserException(this.DotToken, "The class '" + rootType.ClassTypeOrReference.NameToken.Value + "' does not have a field called '" + field + "'.");
default:
throw new ParserException(this.DotToken, "This field does not exist.");
}
}
internal override Expression ResolveNames(
ParserContext parser)
{
FunctionDefinition funcDef; // used in multiple places.
FieldDeclaration fieldDec;
this.Root = this.Root.ResolveNames(parser);
Expression root = this.Root;
string field = this.StepToken.Value;
if (root is NamespaceReference)
{
// already a fully qualified namespace, therefore imports don't matter.
string fullyQualifiedName = ((NamespaceReference)root).Template.Name + "." + field;
TopLevelConstruct 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.FirstToken, "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.IsStaticMethod)
{
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.");
}
return(new FunctionReference(this.FirstToken, funcDef, this.Owner));
}
fieldDec = cd.GetField(field, false);
if (fieldDec != null)
{
if (!fieldDec.IsStaticField)
{
throw new ParserException(this.DotToken, "Cannot make a static reference to a non-static field.");
}
return(new FieldReference(this.FirstToken, fieldDec, this.Owner));
}
if (field == "class")
{
return(new ClassReferenceLiteral(this.FirstToken, cd, this.Owner));
}
// TODO: nested classes, enums, constants
// TODO: show spelling suggestions.
throw new ParserException(this.StepToken, "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.FirstToken, "'base' keyword can only be used inside classes.");
}
ClassDefinition cd = thisClass.BaseClass;
if (cd == null)
{
throw new ParserException(root.FirstToken, "'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.IsStaticMethod)
{
throw new ParserException(this.DotToken, "Cannot reference static methods using 'base' keyword.");
}
return(new BaseMethodReference(this.FirstToken, this.DotToken, this.StepToken, this.Owner));
}
if (root is ThisKeyword)
{
ClassDefinition cd = null;
if (this.Owner != null)
{
if (this.Owner is FunctionDefinition)
{
funcDef = this.Owner as FunctionDefinition;
if (funcDef.IsStaticMethod)
{
throw new ParserException(this.Root.FirstToken, "'this' keyword cannot be used in static methods.");
}
cd = funcDef.Owner as ClassDefinition;
if (cd == null)
{
throw new ParserException(this.Root.FirstToken, "'this' keyword must be used inside a class.");
}
}
else if (this.Owner is ClassDefinition)
{
cd = (ClassDefinition)this.Owner;
}
}
if (cd == null)
{
throw new ParserException(this.Root.FirstToken, "'this' keyword is not allowed here.");
}
funcDef = cd.GetMethod(field, true);
if (funcDef != null)
{
if (funcDef.IsStaticMethod)
{
throw new ParserException(this.DotToken, "This method is static and must be referenced by the class name, not 'this'.");
}
return(new FunctionReference(this.FirstToken, funcDef, this.Owner));
}
FieldDeclaration fieldDef = cd.GetField(field, true);
if (fieldDef != null)
{
if (fieldDef.IsStaticField)
{
throw new ParserException(this.DotToken, "This field is static and must be referenced by the class name, not 'this'.");
}
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.StepToken, "The class '" + cd.NameToken.Value + "' does not have a field named '" + field + "'.");
}
// This is done here in the resolver instead of the parser because some unallowed
// field names (such as .class) are valid.
if (this.StepToken.Value == parser.Keywords.CLASS)
{
if (this.Root is Variable)
{
throw new ParserException(this.Root.FirstToken, "'" + ((Variable)this.Root).Name + "' is not a class.");
}
throw new ParserException(this.DotToken, ".class can only be applied to class names.");
}
parser.VerifyIdentifier(this.StepToken);
return(this);
}
public FunctionReference(Token token, FunctionDefinition funcDef, TopLevelConstruct owner)
: base(token, owner)
{
this.FunctionDefinition = funcDef;
}
private void EnsureModifiersAndTypeSignatureConsistencyForClassMethods()
{
ClassDefinition classDef = (ClassDefinition)this.Owner;
ClassDefinition baseClass = classDef.BaseClass;
bool hasBaseClass = baseClass != null;
if (hasBaseClass)
{
FieldDefinition hiddenField = baseClass.GetField(this.NameToken.Value, true);
if (hiddenField != null)
{
throw new ParserException(this, "This function definition hides a field from a parent class.");
}
}
if (!hasBaseClass)
{
if (this.Modifiers.HasOverride)
{
throw new ParserException(this, "Cannot mark a method as 'override' if it has no base class.");
}
}
else
{
FunctionDefinition overriddenFunction = baseClass.GetMethod(this.NameToken.Value, true);
if (overriddenFunction != null)
{
if (!this.Modifiers.HasOverride)
{
if (this.CompilationScope.IsCrayon)
{
// TODO: just warn if not present
}
else
{
throw new ParserException(this, "This function hides another function from a parent class. If overriding is intentional, use the 'override' keyword.");
}
}
if (overriddenFunction.Modifiers.HasStatic)
{
throw new ParserException(this, "Cannot override a static method.");
}
if (overriddenFunction.Modifiers.AccessModifierType != this.Modifiers.AccessModifierType)
{
throw new ParserException(this, "This method defines a different access modifier than its overridden parent.");
}
if (overriddenFunction.Modifiers.AccessModifierType == AccessModifierType.PRIVATE)
{
throw new ParserException(this, "Cannot override a private method.");
}
if (overriddenFunction.Modifiers.HasInternal &&
overriddenFunction.CompilationScope != this.CompilationScope)
{
throw new ParserException(this, "Cannot override this method. It is marked as internal and is located in a different assembly.");
}
if (overriddenFunction.ResolvedReturnType != this.ResolvedReturnType)
{
if (overriddenFunction.ResolvedReturnType == ResolvedType.ANY &&
this.ResolvedReturnType == ResolvedType.OBJECT)
{
// This is fine.
}
else
{
throw new ParserException(this, "This function returns a different type than its overridden parent.");
}
}
if (overriddenFunction.ArgTypes.Length != this.ArgTypes.Length)
{
throw new ParserException(this, "This function has a different number of arguments than its overridden parent.");
}
if (overriddenFunction.MinArgCount != this.MinArgCount)
{
throw new ParserException(this, "This function has a different number of optional arguments than its overridden parent.");
}
// TODO: if you are overridding a function between a statically and dynamically typed languagte,
// the dynamic language should pick up the types from the statically typed language or the
// statically typed language should require "object" types in its signature for the other direction.
for (int i = 0; i < this.ArgTypes.Length; ++i)
{
ResolvedType expected = overriddenFunction.ResolvedArgTypes[i];
ResolvedType actual = this.ResolvedArgTypes[i];
if (actual != expected &&
!(actual == ResolvedType.OBJECT && expected == ResolvedType.ANY))
{
throw new ParserException(this, "This function has arguments that are different types than its overridden parent.");
}
}
}
else
{
if (this.Modifiers.HasOverride)
{
throw new ParserException(this, "This function is marked as 'override', but there is no method in a parent class with the same name.");
}
}
}
}
private IConstantValue SimplifyFunctionCall(FunctionDefinition func, Expression[] args)
{
if (args.Length == 0)
{
return(null);
}
for (int i = 0; i < args.Length; ++i)
{
if (!(args[i] is IConstantValue))
{
return(null);
}
}
int iValue = 0;
double fValue = 0.0;
bool bValue = false;
double output = 0.0;
string lib = func.Assembly.CanonicalKey;
string name = func.NameToken.Value;
Expression winner;
switch (lib)
{
case "en:Core":
switch (this.Args.Length + ":" + name)
{
// TODO: implement these...
case "1:chr":
case "1:ord":
case "1:parseFloat":
case "1:parseInt":
case "1:typeof":
return(null);
case "1:isString":
case "1:isNumber":
if (this.Args[0] is StringConstant && name == "isString")
{
bValue = true;
}
else if (this.Args[0] is IntegerConstant || this.Args[0] is FloatConstant && name == "isNumber")
{
bValue = true;
}
return(new BooleanConstant(this.FirstToken, bValue, this.Owner));
}
break;
case "en:Math":
double[] nums = new double[this.Args.Length];
// Make sure we're only dealing with numbers.
for (int i = 0; i < this.Args.Length; ++i)
{
if (this.Args[i] is IntegerConstant)
{
nums[i] = ((IntegerConstant)this.Args[i]).Value;
}
else if (this.Args[i] is FloatConstant)
{
nums[i] = ((FloatConstant)this.Args[i]).Value;
}
else
{
throw new ParserException(this.Args[i], "This is not a valid input for " + name + ".");
}
}
switch (this.Args.Length + ":" + name)
{
case "3:ensureRange":
double value = nums[0];
double r1 = nums[1];
double r2 = nums[2];
if (r1 > r2) // swap the values if given in wrong order
{
winner = value <r2 ? args[2] : value> r1 ? args[1] : args[0];
}
else
{
winner = value <r1 ? args[1] : value> r2 ? args[2] : args[0];
}
if (winner is IntegerConstant)
{
return(new IntegerConstant(this.FirstToken, ((IntegerConstant)winner).Value, this.Owner));
}
return(new FloatConstant(this.FirstToken, ((FloatConstant)winner).Value, this.Owner));
case "1:abs":
if (args[0] is IntegerConstant)
{
iValue = ((IntegerConstant)args[0]).Value;
return(new IntegerConstant(this.FirstToken, iValue < 0 ? -iValue : iValue, this.Owner));
}
fValue = nums[0];
return(new FloatConstant(this.FirstToken, fValue < 0 ? -fValue : fValue, this.Owner));
case "2:arctan":
case "2:min":
case "2:max":
double arg1 = nums[0];
double arg2 = nums[1];
if (name == "arctan")
{
output = System.Math.Atan2(arg1, arg2);
if (output < 0)
{
output += TWO_PI;
}
return(new FloatConstant(this.FirstToken, output, this.Owner));
}
winner = (arg1 == arg2)
? args[0]
: name == "min"
? (arg1 < arg2 ? args[0] : args[1])
: (arg1 < arg2 ? args[1] : args[0]);
if (winner is IntegerConstant)
{
return(new IntegerConstant(this.FirstToken, ((IntegerConstant)winner).Value, this.Owner));
}
return(new FloatConstant(this.FirstToken, ((FloatConstant)winner).Value, this.Owner));
case "1:arctan":
case "1:arcsin":
case "1:arccos":
case "1:floor":
case "1:cos":
case "1:log2":
case "1:log10":
case "1:sign":
case "1:sin":
case "1:tan":
case "1:ln":
if (args.Length != 1)
{
return(null);
}
double input = nums[0];
switch (name)
{
case "floor":
return(new IntegerConstant(this.FirstToken, (int)System.Math.Floor(input), this.Owner));
case "arctan":
output = System.Math.Atan(input);
if (output < 0)
{
output += TWO_PI;
}
break;
case "cos": output = System.Math.Cos(input); break;
case "sin": output = System.Math.Sin(input); break;
case "arccos":
case "arcsin":
if (input < -1 || input > 1)
{
throw new ParserException(
this,
"Cannot calculate " + name + " of a value outside of the range of -1 and 1");
}
output = name == "arccos"
? System.Math.Acos(input)
: System.Math.Asin(input);
if (output < 0)
{
output += TWO_PI;
}
break;
case "sign":
return(new IntegerConstant(
this.FirstToken,
input < 0 ? -1 : input > 0 ? 1 : 0,
this.Owner));
case "tan":
try
{
output = System.Math.Tan(input);
}
catch (System.Exception)
{
throw new ParserException(this, "Cannot calculate tan of this value. tan produces undefined results.");
}
break;
case "log10":
case "log2":
case "ln":
if (input < 0)
{
throw new ParserException(this, "Cannot calculate the log of a negative number.");
}
output = name == "log10"
? CalculateLogWithIntegerBase(input, 10)
: name == "log2"
? CalculateLogWithIntegerBase(input, 2)
: System.Math.Log(input);
break;
}
return(new FloatConstant(this.FirstToken, output, this.Owner));
}
break;
}
return(null);
}
internal override Expression ResolveTypes(ParserContext parser, TypeResolver typeResolver)
{
this.Root = this.Root.ResolveTypes(parser, typeResolver);
for (int i = 0; i < this.Args.Length; ++i)
{
this.Args[i] = this.Args[i].ResolveTypes(parser, typeResolver);
}
ResolvedType rootType = this.Root.ResolvedType;
if (rootType == ResolvedType.ANY)
{
this.ResolvedType = ResolvedType.ANY;
return(this);
}
if (rootType.Category == ResolvedTypeCategory.FUNCTION_POINTER)
{
int maxArgCount = rootType.FunctionArgs.Length;
int minArgCount = maxArgCount - rootType.FunctionOptionalArgCount;
if (this.Args.Length < minArgCount || this.Args.Length > maxArgCount)
{
throw new ParserException(this.ParenToken, "This function has the incorrect number of arguments.");
}
for (int i = 0; i < this.Args.Length; ++i)
{
if (!this.Args[i].ResolvedType.CanAssignToA(rootType.FunctionArgs[i]))
{
throw new ParserException(this.Args[i], "Incorrect argument type.");
}
}
this.ResolvedType = rootType.FunctionReturnType;
if (!this.CompilationScope.IsStaticallyTyped && this.Root is FunctionReference)
{
FunctionDefinition fn = ((FunctionReference)this.Root).FunctionDefinition;
if (fn.CompilationScope.IsStaticallyTyped)
{
for (int i = 0; i < this.Args.Length; ++i)
{
ResolvedType actualType = this.Args[i].ResolvedType;
ResolvedType expectedType = fn.ResolvedArgTypes[i];
if (expectedType != ResolvedType.OBJECT && actualType == ResolvedType.ANY)
{
this.Args[i] = new Cast(this.Args[i].FirstToken, expectedType, this.Args[i], this.Owner, false);
}
}
}
}
// TODO: this is temporary until the Math library is converted to Acrylic
if (this.ResolvedType == ResolvedType.ANY &&
this.Root is FunctionReference &&
((FunctionReference)this.Root).FunctionDefinition.CompilationScope.Metadata.ID == "Math")
{
FunctionReference func = (FunctionReference)this.Root;
switch (func.FunctionDefinition.NameToken.Value)
{
case "abs":
case "min":
case "max":
case "ensureRange":
if (this.Args.Count(ex => ex.ResolvedType == ResolvedType.FLOAT) > 0)
{
this.ResolvedType = ResolvedType.FLOAT;
}
else
{
this.ResolvedType = ResolvedType.INTEGER;
}
break;
case "floor":
case "sign":
this.ResolvedType = ResolvedType.INTEGER;
break;
default:
this.ResolvedType = ResolvedType.FLOAT;
break;
}
}
if (this.ResolvedType == ResolvedType.ANY &&
this.CompilationScope.IsStaticallyTyped)
{
// ANY types are not allowed in statically typed compilation scopes.
// Convert this into an object and require the user to perform any specific casts.
this.ResolvedType = ResolvedType.OBJECT;
}
return(this);
}
throw new System.NotImplementedException();
}
internal override Expression Resolve(ParserContext parser)
{
for (int i = 0; i < this.Args.Length; ++i)
{
this.Args[i] = this.Args[i].Resolve(parser);
}
if (this.Root is Variable)
{
string varName = ((Variable)this.Root).Name;
if (parser.GetClass(varName) != null)
{
throw new ParserException(this.ParenToken, "Cannot invoke a class like a function. To construct a new class, the \"new\" keyword must be used.");
}
}
this.Root = this.Root.Resolve(parser);
// TODO: this is hardcoded just for Math.floor(numeric constant). Eventually, it'd be nice
// for a few common functions to have a compile-time codepath here.
// e.g. Core.parseInt, Math.sin, etc.
if (this.Root is FunctionReference && this.Args.Length == 1)
{
FunctionDefinition funcDef = ((FunctionReference)this.Root).FunctionDefinition;
if (funcDef.Library != null &&
funcDef.Library.CanonicalKey == "en:Math" &&
funcDef.NameToken.Value == "floor")
{
Expression arg0 = this.Args[0];
if (arg0 is IntegerConstant)
{
int integerValue = ((IntegerConstant)arg0).Value;
return(new IntegerConstant(this.FirstToken, integerValue, this.Owner));
}
if (arg0 is FloatConstant)
{
double floatValue = ((FloatConstant)arg0).Value;
int integerValue = (int)floatValue;
return(new IntegerConstant(this.FirstToken, integerValue, this.Owner));
}
}
}
if (this.Root is SpecialEntity)
{
if (this.Root is SpecialEntity.EnumMaxFunction)
{
int max = ((SpecialEntity.EnumMaxFunction) this.Root).GetMax();
return(new IntegerConstant(this.Root.FirstToken, max, this.Owner));
}
if (this.Root is SpecialEntity.EnumValuesFunction)
{
int[] rawValues = ((SpecialEntity.EnumValuesFunction) this.Root).GetValues();
List <Expression> values = new List <Expression>();
foreach (int rawValue in rawValues)
{
values.Add(new IntegerConstant(this.Root.FirstToken, rawValue, this.Owner));
}
return(new ListDefinition(this.FirstToken, values, this.Owner));
}
}
return(this);
}
internal override void Resolve(ParserContext parser)
{
for (int i = 0; i < this.Fields.Length; ++i)
{
FieldDefinition field = this.Fields[i];
field.Resolve(parser);
this.Fields[i] = field;
}
for (int i = 0; i < this.Methods.Length; ++i)
{
FunctionDefinition funcDef = this.Methods[i];
funcDef.Resolve(parser);
this.Methods[i] = funcDef;
}
this.Constructor.Resolve(parser);
if (this.StaticConstructor != null)
{
this.StaticConstructor.Resolve(parser);
}
bool hasABaseClass = this.BaseClass != null;
bool callsBaseConstructor = this.Constructor.BaseToken != null;
if (hasABaseClass && callsBaseConstructor)
{
Expression[] defaultValues = this.BaseClass.Constructor.DefaultValues;
int maxValues = defaultValues.Length;
int minValues = 0;
for (int i = 0; i < maxValues; ++i)
{
if (defaultValues[i] == null)
{
minValues++;
}
else
{
break;
}
}
int baseArgs = this.Constructor.BaseArgs.Length;
if (baseArgs < minValues || baseArgs > maxValues)
{
throw new ParserException(this.Constructor.BaseToken, "Invalid number of arguments passed to base constructor.");
}
}
else if (hasABaseClass && !callsBaseConstructor)
{
if (this.BaseClass.Constructor != null)
{
if (this.BaseClass.Constructor.MinArgCount > 0)
{
throw new ParserException(this, "The base class of this class has a constructor which must be called.");
}
}
}
else if (!hasABaseClass && callsBaseConstructor)
{
throw new ParserException(this.Constructor.BaseToken, "Cannot call base constructor without a base class.");
}
else // (!hasABaseClass && !callsBaseConstructor)
{
// yeah, that's fine.
}
}