private ElfClass LoadClass(ClassDef classDef)
{
// so far we assume a single global namespace for class names
var rtimpl = VM.Classes.SingleOrDefault(c => c.Name == classDef.Rtimpl);
if (rtimpl == null)
{
var exception = new ErroneousScriptLoaderException(Script, classDef, ElfExceptionType.ClassRtimplNotFound);
exception.ToString();
throw exception;
}
var @class = new ElfClass(classDef, classDef.Name, rtimpl);
var funcs = new Dictionary<String, NativeMethod>();
foreach (var funcDef in classDef.Funcs)
{
var func = LoadNativeFunc(@class, funcDef);
if (funcs.ContainsKey(func.Name))
{
throw new ErroneousScriptLoaderException(Script, funcDef, ElfExceptionType.DuplicateFuncLoaded);
}
else
{
funcs.Add(func.Name, func);
}
}
@class.Methods.AddRange(funcs.Values.Cast<ElfMethod>());
return @class;
}
protected ElfMethod(AstNode elfNode, ElfClass declaringType, string name, String[] args, bool varargs)
: base(elfNode)
{
DeclaringType = declaringType;
Name = name;
Args = args;
IsVarargs = varargs;
}
public static ElfMethod Resolve(VirtualMachine vm, String name, ElfClass thisClass, params ElfClass[] argClasses)
{
var firstArgClass = argClasses.Length == 0 ? new ElfClass(null, "aux", typeof(object)) : argClasses[0];
Func<ElfMethod, int> isStaticOrCtor = m =>
{
if (!(m is ClrMethod)) return 0;
if (m.DeclaringType != null && m.DeclaringType.Ctors.Contains((ClrMethod)m)) return 1;
if (((ClrMethod)m).Rtimpl.IsStatic) return 1;
return 0;
};
Func<ElfMethod, bool> argcOk = m =>
{
var sigArgs = m.DeclaringType == thisClass ? argClasses.Length : argClasses.Length + isStaticOrCtor(m) - 1;
return m.IsVarargs ? m.Argc <= sigArgs : m.Argc == sigArgs;
};
var methodsOfThis = thisClass.Methods.Where(m => m.Name == name && argcOk(m)).ToArray();
var ctorsOfName = vm.Classes.Where(c => c.Name == name).Select(c => c.Ctors.Where(m => argcOk(m))).Flatten().ToArray();
var methodsOfFirstArg = firstArgClass.Methods.Where(m => m.Name == name && argcOk(m)).ToArray();
var helperMethods = vm.HelperMethods.Where(m => m.Name == name && argcOk(m)).ToArray();
if (methodsOfThis.Length != 0)
{
return methodsOfThis.Single();
}
else if (ctorsOfName.Length != 0)
{
return ctorsOfName.Single();
}
else if (methodsOfFirstArg.Length != 0)
{
return methodsOfFirstArg.Single();
}
else if (helperMethods.Length != 0)
{
return helperMethods.Single();
}
else
{
return null;
}
}
public ElfClass(AstNode elfNode, String name, ElfClass rtimpl)
: this(elfNode, name, rtimpl.ClrType)
{
Rtimpl = rtimpl;
}
public ElfScriptDefinedClassInstance(ElfClass elfClass, Object clrInstance)
{
_type = elfClass;
ClrObject = clrInstance;
}
public void Load()
{
try
{
var classes = new Dictionary<String, ElfClass>();
foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies()
.Where(asm => asm.IsDefined(typeof(ElfDiscoverableAttribute), false)))
{
// n0te. this is useful for debugging so I didn't remove it
// var aname = String.Format("{0} at {1}", assembly.FullName, assembly.Location);
// Trace.WriteLine("======= asm: " + aname + "=======");
// var oldKeys = classes.Keys.ToArray();
foreach (var type in assembly.GetTypes())
{
if (type.IsRtimpl())
{
if (type.IsOpenGeneric())
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error loading RTIMPL type '{0}'. Reason: type is an open generic.", type));
}
// so far we assume a single global namespace for class names
var @class = new ElfClass(null, type.RtimplOf(), type);
// todo. before release we can add russian-names-only regex validator here
if (@class.Name.IsNullOrEmpty())
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error loading RTIMPL type '{0}'. Reason: Elf class name is null or empty.", type));
}
if (classes.ContainsKey(@class.Name))
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error loading RTIMPL type '{0}'. Reason: duplicate Elf class name.", @class.Name));
}
else
{
classes.Add(@class.Name, @class);
}
foreach (var ctor in type.GetConstructors(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
.Where(ctor1 => ctor1.IsRtimpl()))
{
@class.Ctors.Add(new ClrMethod(null, @class, @class.Name, ctor));
}
foreach (var method in type.GetMethods(
BindingFlags.Instance | BindingFlags.Static | BindingFlags.FlattenHierarchy |
BindingFlags.Public | BindingFlags.NonPublic)
.Where(method1 => method1.IsRtimpl()))
{
@class.Methods.Add(new ClrMethod(null, @class, method.RtimplOf(), method));
}
VM.Classes.Add(@class);
}
if (type.IsElfSerializable())
{
var serializableAs = type.ElfSerializableAs();
if (serializableAs.IsNullOrEmpty())
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error registering type '{0}' as serializable. Reason: Type token is null or empty.", type));
}
if (!type.GetInterfaces().Any(iface => iface == typeof(IElfObject)))
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error registering type '{0}' as serializable. Reason: Type doesn't implement the IElfObject interface.", type));
}
var deserializer = type.ElfDeserializer();
if (deserializer == null)
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error registering type '{0}' as serializable. Reason: Type doesn't expose a static Parse method, neither it is convertible from string.", type));
}
VM.Deserializers.Add(serializableAs, deserializer);
}
if (type.IsRthelper())
{
foreach (var ctor in type.GetConstructors(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
.Where(ctor1 => ctor1.IsRtimpl()))
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error registering type '{0}' as RTHELPER. Reason: Rthelpers cannot define RTIMPL constructors.", type));
}
foreach (var ctor in type.GetMethods(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
.Where(ctor1 => ctor1.IsRtimpl()))
{
throw new UnexpectedLoaderException(String.Format(
"Fatal error registering type '{0}' as RTHELPER. Reason: Rthelpers cannot define RTIMPL instance methods.", type));
}
foreach (var method in type.GetMethods(
BindingFlags.Static | BindingFlags.FlattenHierarchy | BindingFlags.Public | BindingFlags.NonPublic)
.Where(method1 => method1.IsRtimpl()))
{
VM.HelperMethods.Add(new ClrMethod(method.RtimplOf(), method));
}
}
}
// n0te. this is useful for debugging so I didn't remove it
// classes.Keys.Except(oldKeys).ForEach(cls => Trace.WriteLine(cls + " " + classes[cls]));
}
}
catch (Exception e)
{
if (e is UnexpectedLoaderException) throw;
throw new UnexpectedLoaderException(e);
}
}
public NativeMethod(AstNode elfNode, ElfClass declaringType)
: base(elfNode, declaringType, ((FuncDef)elfNode).Name, ((FuncDef)elfNode).Args.ToArray(), false)
{
FuncDef = (FuncDef)elfNode;
}
private NativeMethod LoadNativeFunc(ElfClass @class, FuncDef funcDef)
{
var native = new NativeMethod(funcDef, @class);
native.Body = VM.Compiler.Compile(native.FuncDef);
return native;
}
public ClrMethod(AstNode elfNode, ElfClass declaringType, string name, MethodBase rtimpl)
: base(elfNode, declaringType, name, rtimpl.GetParameters().Select(pi => pi.Name).ToArray(), rtimpl.IsVarargs())
{
Rtimpl = rtimpl;
}