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/* NSC -- new scala compiler
* Copyright 2004-2009 LAMP/EPFL
*/
// $Id$
package scala.tools.nsc.symtab.clr
import java.io.IOException
import ch.epfl.lamp.compiler.msil.{Type => MSILType, Attribute => MSILAttribute, _}
import scala.collection.mutable.{HashMap, HashSet}
import scala.tools.nsc.util.{Position, NoPosition}
import classfile.UnPickler
/**
* @author Nikolay Mihaylov
*/
abstract class TypeParser {
val global: Global
import global.loaders.clrTypes
import clrTypes.global._
//##########################################################################
private var clazz: Symbol = _
private var instanceDefs: Scope = _ // was members
private var staticModule: Symbol = _ // was staticsClass
private var staticDefs: Scope = _ // was statics
protected def statics: Symbol = staticModule.moduleClass
protected var busy: Boolean = false // lock to detect recursive reads
private object unpickler extends UnPickler {
val global: TypeParser.this.global.type = TypeParser.this.global
}
def parse(typ: MSILType, root: Symbol) {
def handleError(e: Exception) = {
if (settings.debug.value) e.printStackTrace() //debug
throw new IOException("type '" + typ.FullName + "' is broken\n(" + e.getMessage() + ")")
}
assert(!busy)
busy = true
if (root.isModule) {
this.clazz = root.linkedClassOfModule
this.staticModule = root
} else {
this.clazz = root
this.staticModule = root.linkedModuleOfClass
}
try {
parseClass(typ)
} catch {
case e: FatalError => handleError(e)
case e: RuntimeException => handleError(e)
}
busy = false
}
private def parseClass(typ: MSILType) {
clrTypes.types(clazz) = typ
clrTypes.sym2type(typ) = clazz
if (typ.IsDefined(clrTypes.SCALA_SYMTAB_ATTR, false)) {
val attrs = typ.GetCustomAttributes(clrTypes.SCALA_SYMTAB_ATTR, false);
assert (attrs.length == 1, attrs.length);
val a = attrs(0).asInstanceOf[MSILAttribute];
assert (a.getConstructor() == clrTypes.SYMTAB_CONSTR);
val symtab = a.getConstructorArguments()(0).asInstanceOf[Array[Byte]]
unpickler.unpickle(symtab, 0, clazz.asInstanceOf[unpickler.global.Symbol],
staticModule.asInstanceOf[unpickler.global.Symbol], typ.FullName);
val mClass = clrTypes.getType(typ.FullName + "$");
if (mClass != null) {
clrTypes.types(statics) = mClass;
val moduleInstance = mClass.GetField("MODULE$");
assert (moduleInstance != null, mClass);
clrTypes.fields(statics) = moduleInstance;
}
return
}
val flags = translateAttributes(typ)
val ifaces: Array[MSILType] = typ.getInterfaces()
val superType = if (typ.BaseType() != null) getCLRType(typ.BaseType())
else if (typ.IsInterface()) definitions.ObjectClass.tpe
else definitions.AnyClass.tpe; // this is System.Object
val parents = superType :: ifaces.map(getCLRType).toList
instanceDefs = newClassScope(clazz)
staticDefs = newClassScope(staticModule)
val classInfo = ClassInfoType(parents, instanceDefs, clazz)
val staticInfo = ClassInfoType(List(), staticDefs, statics)
clazz.setFlag(flags)
clazz.setInfo(classInfo)
statics.setFlag(Flags.JAVA)
statics.setInfo(staticInfo)
staticModule.setFlag(Flags.JAVA)
staticModule.setInfo(statics.tpe)
// import nested types
for (ntype <- typ.getNestedTypes() if !(ntype.IsNestedPrivate
|| ntype.IsNestedAssembly
|| ntype.IsNestedFamANDAssem)
|| ntype.IsInterface)
{
val loader = new global.loaders.MSILTypeLoader(ntype)
val nclazz = statics.newClass(NoPosition, ntype.Name.toTypeName)
val nmodule = statics.newModule(NoPosition, ntype.Name)
nclazz.setInfo(loader)
nmodule.setInfo(loader)
staticDefs.enter(nclazz)
staticDefs.enter(nmodule)
assert(nclazz.linkedModuleOfClass == nmodule, nmodule)
assert(nmodule.linkedClassOfModule == nclazz, nclazz)
}
val fields = typ.getFields()
for (field <- fields if !(field.IsPrivate() || field.IsAssembly() || field.IsFamilyAndAssembly)) {
val flags = translateAttributes(field);
val name = newTermName(field.Name);
val fieldType =
if (field.IsLiteral && !field.FieldType.IsEnum)
ConstantType(getConstant(getCLRType(field.FieldType), field.getValue))
else getCLRType(field.FieldType);
val owner = if (field.IsStatic()) statics else clazz;
val sym = owner.newValue(NoPosition, name).setFlag(flags).setInfo(fieldType);
// TODO: set private within!!! -> look at typechecker/Namers.scala
(if (field.IsStatic()) staticDefs else instanceDefs).enter(sym);
clrTypes.fields(sym) = field;
}
for (constr <- typ.getConstructors() if !constr.IsStatic() && !constr.IsPrivate() &&
!constr.IsAssembly() && !constr.IsFamilyAndAssembly())
createMethod(constr);
// initially also contains getters an setters of properties.
val methodsSet = new HashSet[MethodInfo]();
methodsSet ++= typ.getMethods();
for (prop <- typ.getProperties) {
val propType: Type = getCLSType(prop.PropertyType);
if (propType != null) {
val getter: MethodInfo = prop.GetGetMethod(true);
val setter: MethodInfo = prop.GetSetMethod(true);
var gparamsLength: Int = -1;
if (!(getter == null || getter.IsPrivate || getter.IsAssembly
|| getter.IsFamilyAndAssembly))
{
assert(prop.PropertyType == getter.ReturnType);
val gparams: Array[ParameterInfo] = getter.GetParameters();
gparamsLength = gparams.length;
val name: Name = if (gparamsLength == 0) prop.Name else nme.apply;
val flags = translateAttributes(getter);
val owner: Symbol = if (getter.IsStatic) statics else clazz;
val methodSym = owner.newMethod(NoPosition, name).setFlag(flags)
val mtype: Type = if (gparamsLength == 0) PolyType(List(), propType)
else methodType(getter, getter.ReturnType)(methodSym)
methodSym.setInfo(mtype);
methodSym.setFlag(Flags.ACCESSOR);
(if (getter.IsStatic) staticDefs else instanceDefs).enter(methodSym)
clrTypes.methods(methodSym) = getter;
methodsSet -= getter;
}
if (!(setter == null || setter.IsPrivate || setter.IsAssembly
|| setter.IsFamilyAndAssembly))
{
val sparams: Array[ParameterInfo] = setter.GetParameters()
if(getter != null)
assert(getter.IsStatic == setter.IsStatic);
assert(setter.ReturnType == clrTypes.VOID);
if(getter != null)
assert(sparams.length == gparamsLength + 1, "" + getter + "; " + setter);
val name: Name = if (gparamsLength == 0) nme.getterToSetter(prop.Name)
else nme.update;
val flags = translateAttributes(setter);
val mtype = methodType(setter, definitions.UnitClass.tpe);
val owner: Symbol = if (setter.IsStatic) statics else clazz;
val methodSym = owner.newMethod(NoPosition, name).setFlag(flags)
methodSym.setInfo(mtype(methodSym))
methodSym.setFlag(Flags.ACCESSOR);
(if (setter.IsStatic) staticDefs else instanceDefs).enter(methodSym);
clrTypes.methods(methodSym) = setter;
methodsSet -= setter;
}
}
}
/* for (event <- typ.GetEvents) {
// adding += and -= methods to add delegates to an event.
// raising the event ist not possible from outside the class (this is so
// generally in .net world)
val adder: MethodInfo = event.GetAddMethod();
val remover: MethodInfo = event.GetRemoveMethod();
if (!(adder == null || adder.IsPrivate || adder.IsAssembly
|| adder.IsFamilyAndAssembly))
{
assert(adder.ReturnType == clrTypes.VOID);
assert(adder.GetParameters().map(_.ParameterType).toList == List(event.EventHandlerType));
val name = encode("+=");
val flags = translateAttributes(adder);
val mtype: Type = methodType(adder, adder.ReturnType);
createMethod(name, flags, mtype, adder, adder.IsStatic)
methodsSet -= adder;
}
if (!(remover == null || remover.IsPrivate || remover.IsAssembly
|| remover.IsFamilyAndAssembly))
{
assert(remover.ReturnType == clrTypes.VOID);
assert(remover.GetParameters().map(_.ParameterType).toList == List(event.EventHandlerType));
val name = encode("-=");
val flags = translateAttributes(remover);
val mtype: Type = methodType(remover, remover.ReturnType);
createMethod(name, flags, mtype, remover, remover.IsStatic)
methodsSet -= remover;
}
} */
for (method <- methodsSet.iterator)
if (!method.IsPrivate() && !method.IsAssembly() && !method.IsFamilyAndAssembly())
createMethod(method);
// Create methods and views for delegate support
if (clrTypes.isDelegateType(typ)) {
createDelegateView(typ)
createDelegateChainers(typ)
}
// create the box/unbox methods for value types
if (typ.IsValueType) {
val box = statics.newMethod(NoPosition, nme.box)
box.setInfo(MethodType(box.newSyntheticValueParams(List(clazz.tpe)), definitions.ObjectClass.tpe))
definitions.boxMethod(clazz) = box
val unbox = statics.newMethod(NoPosition, nme.unbox)
unbox.setInfo(MethodType(unbox.newSyntheticValueParams(List(definitions.ObjectClass.tpe)), clazz.tpe))
definitions.unboxMethod(clazz) = unbox
//Console.println(typ.FullName + " : " + parents)
}
// for enumerations introduce comparison and bitwise logical operations;
// the backend should recognize and replace them with comparison or
// bitwise logical operations on the primitive underlying type
if (typ.IsEnum) {
val ENUM_CMP_NAMES = List(nme.EQ, nme.NE, nme.LT, nme.LE, nme.GT, nme.GE);
val ENUM_BIT_LOG_NAMES = List(nme.OR, nme.AND, nme.XOR);
val flags = Flags.JAVA | Flags.FINAL
for (cmpName <- ENUM_CMP_NAMES) {
val enumCmp = clazz.newMethod(NoPosition, cmpName)
val enumCmpType = JavaMethodType(enumCmp.newSyntheticValueParams(List(clazz.tpe)), definitions.BooleanClass.tpe)
enumCmp.setFlag(flags).setInfo(enumCmpType)
instanceDefs.enter(enumCmp)
}
for (bitLogName <- ENUM_BIT_LOG_NAMES) {
val enumBitLog = clazz.newMethod(NoPosition, bitLogName)
val enumBitLogType = JavaMethodType(enumBitLog.newSyntheticValueParams(List(clazz.tpe)), classInfo)
enumBitLog.setFlag(flags).setInfo(enumBitLogType)
instanceDefs.enter(enumBitLog)
}
}
} // parseClass
private def createMethod(method: MethodBase) {
val rettype = if (method.IsConstructor()) clazz.tpe
else getCLSType(method.asInstanceOf[MethodInfo].ReturnType);
if (rettype == null) return;
val mtype = methodType(method, rettype);
if (mtype == null) return;
val flags = translateAttributes(method);
val owner = if (method.IsStatic()) statics else clazz;
val methodSym = owner.newMethod(NoPosition, getName(method)).setFlag(flags)
methodSym.setInfo(mtype(methodSym))
(if (method.IsStatic()) staticDefs else instanceDefs).enter(methodSym);
if (method.IsConstructor())
clrTypes.constructors(methodSym) = method.asInstanceOf[ConstructorInfo]
else clrTypes.methods(methodSym) = method.asInstanceOf[MethodInfo];
}
private def createMethod(name: Name, flags: Long, args: Array[MSILType], retType: MSILType, method: MethodInfo, statik: Boolean): Symbol = {
val mtype = methodType(args, getCLSType(retType))
assert(mtype != null)
createMethod(name, flags, mtype, method, statik)
}
private def createMethod(name: Name, flags: Long, mtype: Symbol => Type, method: MethodInfo, statik: Boolean): Symbol = {
val methodSym: Symbol = (if (statik) statics else clazz).newMethod(NoPosition, name)
methodSym.setFlag(flags).setInfo(mtype(methodSym))
(if (statik) staticDefs else instanceDefs).enter(methodSym)
if (method != null)
clrTypes.methods(methodSym) = method
methodSym
}
private def createDelegateView(typ: MSILType) = {
val invoke: MethodInfo = typ.GetMember("Invoke")(0).asInstanceOf[MethodInfo];
val invokeRetType: Type = getCLRType(invoke.ReturnType);
val invokeParamTypes: List[Type] =invoke.GetParameters().map(_.ParameterType).map(getCLSType).toList;
val funType: Type = definitions.functionType(invokeParamTypes, invokeRetType);
val typClrType: Type = getCLRType(typ);
val flags = Flags.JAVA | Flags.STATIC | Flags.IMPLICIT; // todo: static? think not needed
// create the forward view: delegate => function
val delegateParamTypes: List[Type] = List(typClrType);
// not ImplicitMethodType, this is for methods with implicit parameters (not implicit methods)
val forwardViewMethodType = (msym: Symbol) => JavaMethodType(msym.newSyntheticValueParams(delegateParamTypes), funType)
val fmsym = createMethod(nme.view_, flags, forwardViewMethodType, null, true);
// create the backward view: function => delegate
val functionParamTypes: List[Type] = List(funType);
val backwardViewMethodType = (msym: Symbol) => JavaMethodType(msym.newSyntheticValueParams(functionParamTypes), typClrType)
val bmsym = createMethod(nme.view_, flags, backwardViewMethodType, null, true);
}
private def createDelegateChainers(typ: MSILType) = {
val flags: Long = Flags.JAVA | Flags.FINAL
val args: Array[MSILType] = Array(typ)
var s = createMethod(encode("+="), flags, args, clrTypes.VOID, clrTypes.DELEGATE_COMBINE, false);
s = createMethod(encode("-="), flags, args, clrTypes.VOID, clrTypes.DELEGATE_REMOVE, false);
s = createMethod(nme.PLUS, flags, args, typ, clrTypes.DELEGATE_COMBINE, false);
s = createMethod(nme.MINUS, flags, args, typ, clrTypes.DELEGATE_REMOVE, false);
}
private def getName(method: MethodBase): Name = {
if (method.IsConstructor()) return nme.CONSTRUCTOR;
val name = method.Name;
if (method.IsStatic()) return newTermName(name);
val params = method.GetParameters();
name match {
case "GetHashCode" if (params.length == 0) => nme.hashCode_;
case "ToString" if (params.length == 0) => nme.toString_;
case "Finalize" if (params.length == 0) => nme.finalize_;
case "Equals" if (params.length == 1 && params(0).ParameterType == clrTypes.OBJECT) =>
nme.equals_;
case "Invoke" if (clrTypes.isDelegateType(method.DeclaringType)) => nme.apply;
case _ => newTermName(name);
}
}
//##########################################################################
private def methodType(method: MethodBase, rettype: MSILType): Symbol => Type = {
val rtype = getCLSType(rettype);
if (rtype == null) null else methodType(method, rtype);
}
/** Return a method type for the given method. */
private def methodType(method: MethodBase, rettype: Type): Symbol => Type =
methodType(method.GetParameters().map(_.ParameterType), rettype);
/** Return a method type for the provided argument types and return type. */
private def methodType(argtypes: Array[MSILType], rettype: Type): Symbol => Type = {
def paramType(typ: MSILType): Type =
if (typ eq clrTypes.OBJECT) definitions.AnyClass.tpe
else getCLSType(typ);
val ptypes = argtypes.map(paramType).toList;
if (ptypes.contains(null)) null
else method => JavaMethodType(method.newSyntheticValueParams(ptypes), rettype);
}
//##########################################################################
private def getClassType(typ: MSILType): Type = {
assert(typ != null);
val res = definitions.getClass(typ.FullName.replace('+', '.')).tpe;
//if (res.isError())
// global.reporter.error("unknown class reference " + type.FullName);
res
}
private def getCLSType(typ: MSILType): Type = {
if (/*type == clrTypes.BYTE ||*/ typ == clrTypes.USHORT
|| typ == clrTypes.UINT || typ == clrTypes.ULONG
|| typ.IsNotPublic() || typ.IsNestedPrivate()
|| typ.IsNestedAssembly() || typ.IsNestedFamANDAssem()
|| typ.IsPointer()
|| (typ.IsArray() && getCLSType(typ.GetElementType()) == null))
null;
//Symbol s = clrTypes.getSymbol(type);
//scalac.symtab.Type t = s != null ? make.classType(s) : getCLRType(type);
else
getCLRType(typ)
}
private def getCLRType(typ: MSILType): Type =
if (typ == clrTypes.OBJECT)
definitions.ObjectClass.tpe;
else if (typ == clrTypes.VALUE_TYPE)
definitions.AnyValClass.tpe
else if (typ == clrTypes.STRING)
definitions.StringClass.tpe;
else if (typ == clrTypes.VOID)
definitions.UnitClass.tpe
else if (typ == clrTypes.BOOLEAN)
definitions.BooleanClass.tpe
else if (typ == clrTypes.CHAR)
definitions.CharClass.tpe
else if (typ == clrTypes.BYTE || typ == clrTypes.UBYTE)
definitions.ByteClass.tpe
else if (typ == clrTypes.SHORT || typ == clrTypes.USHORT)
definitions.ShortClass.tpe
else if (typ == clrTypes.INT || typ == clrTypes.UINT)
definitions.IntClass.tpe
else if (typ == clrTypes.LONG || typ == clrTypes.ULONG)
definitions.LongClass.tpe
else if (typ == clrTypes.FLOAT)
definitions.FloatClass.tpe
else if (typ == clrTypes.DOUBLE)
definitions.DoubleClass.tpe
else if (typ.IsArray())
appliedType(definitions.ArrayClass.tpe,
List(getCLRType(typ.GetElementType())));
else {
val res = clrTypes.sym2type.get (typ) match {
case Some(sym) => sym.tpe
case None => getClassType(typ);
}
assert (res != null, typ)
res
}
// the values are Java-Box-Classes (e.g. Integer, Boolean, Character)
// java.lang.Number to get the value (if a number, not for boolean, character)
// see ch.epfl.lamp.compiler.msil.util.PEStream.java
def getConstant(constType: Type, value: Object): Constant = {
val typeClass = constType.typeSymbol
if (typeClass == definitions.BooleanClass)
Constant(value.asInstanceOf[java.lang.Boolean].booleanValue)
else if (typeClass == definitions.ByteClass)
Constant(value.asInstanceOf[java.lang.Number].byteValue)
else if (typeClass == definitions.ShortClass)
Constant(value.asInstanceOf[java.lang.Number].shortValue)
else if (typeClass == definitions.CharClass)
Constant(value.asInstanceOf[java.lang.Character].charValue)
else if (typeClass == definitions.IntClass)
Constant(value.asInstanceOf[java.lang.Number].intValue)
else if (typeClass == definitions.LongClass)
Constant(value.asInstanceOf[java.lang.Number].longValue)
else if (typeClass == definitions.FloatClass)
Constant(value.asInstanceOf[java.lang.Number].floatValue)
else if (typeClass == definitions.DoubleClass)
Constant(value.asInstanceOf[java.lang.Number].doubleValue)
else if (typeClass == definitions.StringClass)
Constant(value.asInstanceOf[java.lang.String])
else
abort("illegal value: " + value + ", class-symbol: " + typeClass)
}
private def translateAttributes(typ: MSILType): Long = {
var flags: Long = Flags.JAVA;
if (typ.IsNotPublic() || typ.IsNestedPrivate()
|| typ.IsNestedAssembly() || typ.IsNestedFamANDAssem())
flags = flags | Flags.PRIVATE;
else if (typ.IsNestedFamily() || typ.IsNestedFamORAssem())
flags = flags | Flags.PROTECTED;
if (typ.IsAbstract())
flags = flags | Flags.ABSTRACT;
if (typ.IsSealed())
flags = flags | Flags.FINAL;
if (typ.IsInterface())
flags = flags | Flags.INTERFACE | Flags.TRAIT | Flags.ABSTRACT;
flags
}
private def translateAttributes(field: FieldInfo): Long = {
var flags: Long = Flags.JAVA;
if (field.IsPrivate() || field.IsAssembly() || field.IsFamilyAndAssembly())
flags = flags | Flags.PRIVATE;
else if (field.IsFamily() || field.IsFamilyOrAssembly())
flags = flags | Flags.PROTECTED;
if (field.IsInitOnly())
flags = flags | Flags.FINAL;
else
flags = flags | Flags.MUTABLE;
if (field.IsStatic)
flags = flags | Flags.STATIC
flags
}
private def translateAttributes(method: MethodBase): Long = {
var flags: Long = Flags.JAVA;
if (method.IsPrivate() || method.IsAssembly() || method.IsFamilyAndAssembly())
flags = flags | Flags.PRIVATE;
else if (method.IsFamily() || method.IsFamilyOrAssembly())
flags = flags | Flags.PROTECTED;
if (method.IsAbstract())
flags = flags | Flags.DEFERRED;
if (method.IsStatic)
flags = flags | Flags.STATIC
flags
}
}
|