public ClassMember(string name, ITypeDef typeDef, IExpr initializer, bool isGetonly)
{
this.name = name;
this.typeDef = typeDef;
this.initializer = initializer;
this.isGetonly = isGetonly;
}
// Returns true if it succeeds, false if there was a name conflict.
public bool AddMember(string name, ITypeDef typeDef, IExpr initializer = null, bool isStatic = false, bool isFunctionVariable = false, bool isGetonly = false)
{
// Fail if a member with that name already exists.
if (DoesFieldExist(name, SEARCH.EITHER))
{
return(false);
}
var member = new ClassMember(name, typeDef, initializer, isGetonly);
// This logic is weird but works because the language currently
// doesn't allow static member functions.
if (isStatic)
{
member.index = _statics.Add(member.name, member);
staticVars.Add(new Variable(member.name, typeDef, null));
}
else if (!isFunctionVariable && typeDef is TypeDef_Function)
{
member.index = _memberFuncs.Add(member.name, member);
}
else
{
member.index = _fields.Add(member.name, member);
}
return(true);
}
/// <summary>
/// Builds a new type from the provided list of properties. The new type implements IObjectAccessor interface
/// </summary>
/// <param name="typeDef">Type definition with list of property names and corresponding types.</param>
/// <returns>Newly created type</returns>
public static Type MakeType(ITypeDef typeDef)
{
if (typeDef == null)
{
throw new ArgumentNullException("typeDef");
}
string typeName = typeDef.Name;
if (string.IsNullOrEmpty(typeName))
{
typeName = MakeUniqueName();
}
s_lock.EnterWriteLock();
try
{
TypeBuilder tb = s_mb.DefineType(typeName, TypeAttributes.Public);
tb.SetParent(typeof(ObjectAccessorBase <>).MakeGenericType(tb));
int order = 0;
foreach (var fb in typeDef.PropertyDefList.Select(entry => tb.DefineField(entry.Key, entry.Value.ResolveType(), FieldAttributes.Public)))
{
AddOrderAttribute(fb, order++);
}
return(tb.CreateType());
}
finally
{
s_lock.ExitWriteLock();
}
}
// set uses this to 1) check to see if symbol already exists, and 2) caches the variable for use during evaluate
// set can also be used to set global variables.
// for uses this to 1) check to make sure symbol doesn't already exist, 2) push var on the stack for type checking
public VarStackRef CreateTemp(string symbol, ITypeDef type, bool global = false, bool doesntCollideWithGlobal = false, bool unique = false)
{
if (null != GetTypeByName(symbol))
{
return(new VarStackRef(VarStackRef.ErrorType.AlreadyExists));
}
if (Pb.reservedWords.Contains(symbol))
{
return(new VarStackRef(VarStackRef.ErrorType.ReservedSymbol));
}
// Unsure about this null
VarStackRef existingRef = stack.GetVarIndexByName(null, symbol, true);
if (existingRef.isValid)
{
if (!(doesntCollideWithGlobal && existingRef.isGlobal))
{
return(new VarStackRef(VarStackRef.ErrorType.AlreadyExists));
}
}
if (unique)
{
Variable var = new Variable(symbol, type, null);
return(stack.AddExistingVariable(symbol, global, var));
}
else
{
return(stack.AddVariable(symbol, global, type, null));
}
}
/* Todo, perhaps: Add function which allows C# to add static functions later. Could help C#-Pebble communication.
* public Variable AddStaticLiteralAfterFinalization(ExecContext context, string name, ITypeDef typeDef, object value) {
* Variable variable = new Variable(name, typeDef);
* staticVars.Add(variable);
* variable.value = value;
* return variable;
* }
*/
// Use to add an override of a member function.
// Caller is responsible for checking that...
// 1) we have a parent
// 2) it has a function with this name.
public void AddFunctionOverride(string name, ITypeDef typeDef, IExpr initializer = null)
{
var member = new ClassMember(name, typeDef, initializer, false);
//var mr = GetMemberRef(name);
member.index = _memberFuncs.Set(name, member);
}
public virtual bool CanStoreValue(ExecContext context, ITypeDef valueType)
{
//if (valueType is TypeDef) {
// return null == (valueType as TypeDef).IsNull();
//}
if (valueType.IsNull())
{
return(true);
}
TypeDef_Function funcValueType = valueType as TypeDef_Function;
if (null == funcValueType)
{
return(false);
}
if (!retType.Equals(IntrinsicTypeDefs.VOID) && !retType.CanStoreValue(context, funcValueType.retType))
{
return(false);
}
if (null != classType)
{
if (null == funcValueType.classType || !classType.CanStoreValue(context, funcValueType.classType))
{
return(false);
}
// This is the point of isStatic in this class. This is saying, "I can save a reference to a class member function only if it is static."
}
else if (null != funcValueType.classType && !funcValueType.isStaticMember)
{
return(false);
}
// Mismatch if other's max args exceeds our max args.
if (argTypes.Count > funcValueType.argTypes.Count)
{
return(false);
}
// Mismatch if we have fewer min args than they do.
// (Meaning we could be called with fewer arguments than they have default values for.)
if (minArgs < funcValueType.minArgs)
{
return(false);
}
// Make sure that for every argument WE have, THEIR argument's type matches.
for (int ii = 0; ii < argTypes.Count; ++ii)
{
if (!funcValueType.argTypes[ii].CanStoreValue(context, argTypes[ii]))
{
return(false);
}
}
return(true);
}
// NOTE: isStatic = true has never been tested. Library functions are static but are neither flagged as static nor as class members,
// so references can be saved to them by users already.
public FunctionValue_Host(ITypeDef _retType, List <ITypeDef> _argTypes, EvaluateDelegate _Evaluate, bool _varargs = false, TypeDef_Class classType = null, bool isStatic = false, List <Expr_Literal> defaultArgVals = null)
{
argDefaultValues = defaultArgVals;
BuildArgHasDefaults(_argTypes.Count);
valType = TypeFactory.GetTypeDef_Function(_retType, _argTypes, minArgs, _varargs, classType, true, isStatic);
Evaluate = _Evaluate;
}
public override bool CanStoreValue(ExecContext context, ITypeDef valueType)
{
if (valueType is TypeDef_Enum)
{
return(((TypeDef_Enum)valueType).className == className);
}
return(false);
}
// ***************************************************************************
// Type functions.
// ***************************************************************************
public bool CreateAlias(string alias, ITypeDef typeDefIn)
{
if (_types.ContainsKey(alias))
{
return(false);
}
_types.Add(alias, typeDefIn);
return(true);
}
public bool UpdateAlias(string alias, ITypeDef typeDefIn)
{
if (!_types.ContainsKey(alias))
{
return(false);
}
_types[alias] = typeDefIn;
return(true);
}
public Variable Set(string nameIn, ITypeDef typeIn, object valueIn = null)
{
Pb.Assert(null != typeIn, "Can't have a variable without a type.");
name = nameIn;
type = typeIn;
value = valueIn;
unique = false;
return(this);
}
// Use this one for class members, both regular and static.
// Note: statics could be stored as uniques, but everything works
// atm. If it aint broke, don't fix it.
public VarStackRef(ITypeDef typeDefIn, int callIx, MemberRef memRef)
{
errorType = ErrorType.None;
typeDef = typeDefIn;
callIndexOffset = callIx;
varIndex = -1;
memberRef = memRef;
isGlobal = false;
variable = null;
}
// Convenience function for registering a List<> with a given type, because this gets done a number of times.
public ClassDef RegisterIfUnregisteredList(ITypeDef valueType)
{
List <ITypeDef> genericTypes = new List <ITypeDef>();
genericTypes.Add(valueType);
TypeDef_Class listTypeDef = TypeFactory.GetTypeDef_Class("List", genericTypes, false);
return(engine.defaultContext.RegisterIfUnregisteredTemplate(listTypeDef));
}
// Use this one for non-unique variables on the varStack.
public VarStackRef(ITypeDef typeDefIn, int callIx, int ix)
{
errorType = ErrorType.None;
typeDef = typeDefIn;
callIndexOffset = callIx;
varIndex = ix;
memberRef = MemberRef.invalid;
isGlobal = false;
variable = null;
}
// This is for uniques, both globals and those on the stack.
public VarStackRef(Variable uniqueVariable, bool global)
{
errorType = ErrorType.None;
callIndexOffset = -9000;
varIndex = -1;
isGlobal = global;
memberRef = MemberRef.invalid;
typeDef = uniqueVariable.type;
variable = uniqueVariable;
variable.unique = true;
}
// This creates an invalid VarStackRef.
public VarStackRef(ErrorType error)
{
Pb.Assert(error != ErrorType.None);
errorType = error;
callIndexOffset = -9000;
varIndex = -1;
isGlobal = false;
memberRef = MemberRef.invalid;
typeDef = null;
variable = null;
}
public static TypeDef_Function GetTypeDef_Function(ITypeDef retType, List <ITypeDef> argTypes, int minArgs, bool _varargs, TypeDef_Class classType, bool isConst, bool isStatic)
{
if (minArgs < 0)
{
minArgs = argTypes.Count;
}
string args = "";
for (int ii = 0; ii < argTypes.Count; ++ii)
{
string defaultValueString = "";
if (ii >= minArgs)
{
defaultValueString = " ?";
}
args += (ii == 0 ? "" : ", ") + argTypes[ii] + defaultValueString;
}
string classPart = "";
if (null != classType)
{
classPart = ":" + classType.className;
}
string name = "function" + classPart + "<" + retType + "(" + args + ")>";
if (_varargs)
{
name = name + " varargs";
}
if (isStatic)
{
name = name + " static";
}
if (isConst)
{
name = name + " const";
}
if (_typeRegistry.ContainsKey(name))
{
return(_typeRegistry[name] as TypeDef_Function);
}
TypeDef_Function newDef = new TypeDef_Function(retType, argTypes, minArgs, _varargs, classType, isConst, isStatic);
#if PEBBLE_TRACETYPES
Console.WriteLine("Registering new function type: " + name);
#endif
_typeRegistry.Add(name, newDef);
return(newDef);
}
internal TypeDef_Function(ITypeDef _retType, List <ITypeDef> _argTypes, int _minArgs, bool _varargs, TypeDef_Class classTypeIn, bool _isConst, bool _isStaticFunction)
{
retType = _retType;
argTypes = _argTypes;
minArgs = _minArgs;
varargs = _varargs;
isConst = _isConst;
classType = classTypeIn;
isStaticMember = _isStaticFunction;
Pb.Assert(!_varargs || minArgs == _argTypes.Count, "internal error: function cannot be both varArgs and have arguments with default values.");
}
public bool CreateGlobal(string symbol, ITypeDef type, object value = null)
{
Variable existing = stack.GetGlobalVariable(symbol); // existence check
if (null != existing)
{
return(false);
}
VarStackRef vsr = stack.AddVariable(symbol, true, type, value);
return(null != stack.GetVarAtIndex(vsr)); // DoesVarExist
}
//public override bool Equals(object obj) {
// throw new InvalidProgramException("INTERNAL ERROR: Attempt to use type before it has been evaluated. (Equals)");
//}
public override ITypeDef Resolve(ExecContext context, ref bool error)
{
if (name == "void")
{
return(IntrinsicTypeDefs.VOID);
}
ITypeDef def = context.GetTypeByName(name);
if (null == def)
{
context.engine.LogCompileError(ParseErrorType.TypeNotFound, "Type '" + name + "' not found.");
error = true;
return(null);
}
if (null == _templateTypes)
{
if (_isConst && !def.IsConst())
{
return(def.Clone(true));
}
return(def);
}
// If we have template types, then we must be a TypeDef_Class.
List <ITypeDef> genericTypes = new List <ITypeDef>();
for (int ii = 0; ii < _templateTypes.Count; ++ii)
{
genericTypes.Add(_templateTypes[ii].Resolve(context, ref error));
}
if (error)
{
return(null);
}
//TypeDef_Class result = new TypeDef_Class(name, genericTypes, _isConst);
TypeDef_Class result = TypeFactory.GetTypeDef_Class(name, genericTypes, _isConst);
if (null == context.RegisterIfUnregisteredTemplate(result))
{
error = true;
}
return(result);
}
public virtual ITypeDef ResolveTemplateTypes(List <ITypeDef> genericTypes, ref bool modified)
{
List <ITypeDef> args = new List <ITypeDef>();
for (int ii = 0; ii < argTypes.Count; ++ii)
{
args.Add(argTypes[ii].ResolveTemplateTypes(genericTypes, ref modified));
}
ITypeDef newRetType = retType.ResolveTemplateTypes(genericTypes, ref modified);
if (null != classType)
{
classType.ResolveTemplateTypes(genericTypes, ref modified);
}
return(TypeFactory.GetTypeDef_Function(newRetType, args, minArgs, varargs, classType, isConst, isStaticMember));
}
public bool Comparable(ExecContext context, ITypeDef other)
{
if (!(other is TypeDef_Class))
{
return(false);
}
if (Equals(other))
{
return(true);
}
TypeDef_Class otherClassType = other as TypeDef_Class;
return(null != context.DetermineAncestor(this, otherClassType));
}
public virtual bool CanStoreValue(ExecContext context, ITypeDef valueType)
{
if (valueType is TypeDef && null == ((TypeDef)valueType).GetHostType())
{
return(true);
}
TypeDef_Class classValueType = valueType as TypeDef_Class;
if (null == classValueType)
{
return(false);
}
if (!context.IsChildClass(context.GetClass(className), context.GetClass(classValueType.className)))
{
return(false);
}
// If neither has generic types, we match.
if (null == classValueType._genericTypes && null == _genericTypes)
{
return(true);
}
// If only one has generic types, we do not.
if (null == classValueType._genericTypes || null == _genericTypes)
{
return(false);
}
// If they don't have the same number, we do not.
if (classValueType._genericTypes.Count != _genericTypes.Count)
{
return(false);
}
for (int ii = 0; ii < _genericTypes.Count; ++ii)
{
if (_genericTypes[ii] != classValueType._genericTypes[ii])
{
return(false);
}
}
return(true);
}
// Only called by the context.
public void Initialize()
{
if (null != _fields)
{
return;
}
// 1) fields.
_fields = new MemberList();
if (null != parent)
{
for (int ii = 0; ii < parent._fields.Count; ++ii)
{
ClassMember member = parent._fields.Get(ii);
bool modified = false;
ITypeDef resolvedType = parent.IsGeneric() ? member.typeDef.ResolveTemplateTypes(typeDef.genericTypes, ref modified) : member.typeDef;
ClassMember newMember = new ClassMember(member.name, resolvedType, member.initializer, member.isGetonly);
newMember.index = _fields.Add(member.name, newMember);
}
}
// 2) Functions
_memberFuncs = new MemberList();
if (null != parent)
{
for (int ii = 0; ii < parent._memberFuncs.Count; ++ii)
{
ClassMember member = parent._memberFuncs.Get(ii);
bool modified = false;
ITypeDef resolvedType = parent.IsGeneric() ? member.typeDef.ResolveTemplateTypes(typeDef.genericTypes, ref modified) : member.typeDef;
ClassMember newMember = new ClassMember(member.name, resolvedType, member.initializer, member.isGetonly);
newMember.index = _memberFuncs.Add(member.name, newMember);
}
vftableVars = new List <Variable>(parent.vftableVars);
}
else
{
vftableVars = new List <Variable>();
}
// 3) Statics aren't copied.
_statics = new MemberList();
staticVars = new List <Variable>();
}
public static ITypeDef GetConstVersion(ITypeDef original)
{
if (original.IsConst())
{
return(original);
}
string constName = original.GetName() + " const";
if (_typeRegistry.ContainsKey(constName))
{
return(_typeRegistry[constName]);
}
ITypeDef result = original.Clone(true);
_typeRegistry.Add(constName, result);
return(result);
}
public string GetDebugString(string name)
{
string result = "";
result += retType.ToString() + " " + name + (null != classType ? ":" + classType.className : "") + "(";
for (int iArg = 0; iArg < argTypes.Count; ++iArg)
{
ITypeDef argdef = argTypes[iArg] as ITypeDef;
if (0 != iArg)
{
result += ", ";
}
result += argdef.ToString() + (iArg >= minArgs ? "?" : "");
}
if (varargs)
{
result += "[, ...]";
}
result += ");\n";
return(result);
}
public PebbleEnum(ExecContext context, string _enumName, ITypeDef valueTypeIn)
{
enumName = _enumName;
valueType = valueTypeIn;
// Apparently need to register non-const first.
ITypeDef nonConstEnumType = TypeFactory.GetTypeDef_Enum(_enumName, false);
enumType = (TypeDef_Enum)TypeFactory.GetConstVersion(nonConstEnumType);
_classDef = new ClassDef_Enum(this, _enumName, enumType);
context.RegisterClass(_classDef);
_classDef.childAllocator = () => {
return(new ClassValue_Enum());
};
_classDef.Initialize();
//don't think this is needed _classDef.AddMemberLiteral("enumName", IntrinsicTypeDefs.CONST_STRING, _enumName, false);
_classDef.AddMember("name", IntrinsicTypeDefs.CONST_STRING);
_classDef.AddMember("value", valueType.Clone(true), null, false, true);
{
FunctionValue_Host.EvaluateDelegate eval = (_context, args, thisScope) => {
ClassValue cv = thisScope as ClassValue;
return(enumName + "::" + cv.Get(mrName).value);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
}, eval, false, _classDef.typeDef);
_classDef.AddMemberLiteral("ThisToString", newValue.valType, newValue, false);
}
_classDef.FinalizeClass(context);
if (mrName.isInvalid)
{
mrName = _classDef.GetMemberRef(null, "name", ClassDef.SEARCH.NORMAL);
mrValue = _classDef.GetMemberRef(null, "value", ClassDef.SEARCH.NORMAL);
}
}
public VarStackRef AddVariable(string name, bool global, ITypeDef type, object value = null)
{
Variable var;
if (global)
{
var = new Variable(name, type, value);
_globals.Set(name, var);
return(new VarStackRef(var, true));
}
if (_varStack.Count == _varCount)
{
var = new Variable(name, type, value);
_varStack.Add(var);
}
else
{
var = _varStack[_varCount];
if (null == var)
{
var = new Variable(name, type, value);
_varStack[_varCount] = var;
}
else
{
var.Set(name, type, value);
}
}
++_varCount;
#if PEBBLE_TRACESTACK
TraceLog("AddVariable " + type.ToString() + " " + name + "[" + (_varCount - 1) + "] = <" + value + ">");
#endif
return(new VarStackRef(type, -1, _varCount - _callStack[_callCount - 1].varStackStart - 1));
}
// D B A
// G E B A
// This is specifically for the conditional operator.
// typeof(true?D:G) is B
public ITypeDef GetMostCommonType(ITypeDef typeA, ITypeDef typeB)
{
bool aIsClass = typeA is TypeDef_Class;
if (aIsClass)
{
bool bIsClass = typeB is TypeDef_Class;
if (bIsClass)
{
TypeDef_Class classTypeA = typeA as TypeDef_Class;
TypeDef_Class classTypeB = typeB as TypeDef_Class;
return(GetMostCommonType(classTypeA, classTypeB));
}
}
// If they aren't both classes then they must be equal or they
// have no commonality.
if (typeA.Equals(typeB))
{
return(typeA);
}
return(null);
}
/// <summary>
/// Builds a new type from the provided list of properties. The new type implements IObjectAccessor interface
/// </summary>
/// <param name="typeDef">Type definition with list of property names and corresponding types.</param>
/// <returns>Newly created type</returns>
public static Type MakeType(ITypeDef typeDef)
{
if (typeDef == null)
throw new ArgumentNullException("typeDef");
string typeName = typeDef.Name;
if (string.IsNullOrEmpty(typeName))
typeName = MakeUniqueName();
s_lock.EnterWriteLock();
try
{
TypeBuilder tb = s_mb.DefineType(typeName, TypeAttributes.Public);
tb.SetParent(typeof(ObjectAccessorBase<>).MakeGenericType(tb));
int order = 0;
foreach (var fb in typeDef.PropertyDefList.Select(entry => tb.DefineField(entry.Key, entry.Value.ResolveType(), FieldAttributes.Public)))
AddOrderAttribute(fb, order++);
return tb.CreateType();
}
finally
{
s_lock.ExitWriteLock();
}
}
public static Type ResolveTypeDef(ITypeDef td)
{
return GetType(td.Name) ?? MakeType(td);
}
// Call this one to create a variable *during execution*.
// Doesn't do error checking, doesn't care if variable already exists.
// If you aren't sure what you are doing, you probably want to use CreateGlobal.
public Variable CreateEval(string symbol, ITypeDef type, object value = null, bool isGlobal = false)
{
VarStackRef vsr = stack.AddVariable(symbol, isGlobal, type, value);
return(stack.GetVarAtIndex(vsr));
}