< prev index next > src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Lower.java
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private final boolean disableProtectedAccessors; // experimental
private final PkgInfo pkginfoOpt;
private final boolean optimizeOuterThis;
private final boolean useMatchException;
private final HashMap<TypePairs, String> typePairToName;
+ private final boolean allowValueClasses;
private int variableIndex = 0;
@SuppressWarnings("this-escape")
protected Lower(Context context) {
context.put(lowerKey, this);
Source source = Source.instance(context);
Preview preview = Preview.instance(context);
useMatchException = Feature.PATTERN_SWITCH.allowedInSource(source) &&
(preview.isEnabled() || !preview.isPreview(Feature.PATTERN_SWITCH));
typePairToName = TypePairs.initialize(syms);
+ this.allowValueClasses = (!preview.isPreview(Feature.VALUE_CLASSES) || preview.isEnabled()) &&
+ Feature.VALUE_CLASSES.allowedInSource(source);
}
/** The currently enclosing class.
*/
ClassSymbol currentClass;
/** The currently enclosing outermost member definition.
*/
JCTree outermostMemberDef;
+ /** A hash table mapping local classes to a set of outer this fields
+ */
+ public Map<ClassSymbol, Set<JCExpression>> initializerOuterThis = new WeakHashMap<>();
+
/** A navigator class for assembling a mapping from local class symbols
* to class definition trees.
* There is only one case; all other cases simply traverse down the tree.
*/
class ClassMap extends TreeScanner {
for (List<ClassSymbol> l = accessConstrTags; l.nonEmpty(); l = l.tail) {
ClassSymbol c = l.head;
if (isTranslatedClassAvailable(c))
continue;
// Create class definition tree.
! JCClassDecl cdec = makeEmptyClass(STATIC | SYNTHETIC,
c.outermostClass(), c.flatname, false);
swapAccessConstructorTag(c, cdec.sym);
translated.append(cdec);
}
}
for (List<ClassSymbol> l = accessConstrTags; l.nonEmpty(); l = l.tail) {
ClassSymbol c = l.head;
if (isTranslatedClassAvailable(c))
continue;
// Create class definition tree.
! // IDENTITY_TYPE will be interpreted as ACC_SUPER for older class files so we are fine
+ JCClassDecl cdec = makeEmptyClass(STATIC | SYNTHETIC | IDENTITY_TYPE,
c.outermostClass(), c.flatname, false);
swapAccessConstructorTag(c, cdec.sym);
translated.append(cdec);
}
}
Name flatname = names.fromString("" + topClass.getQualifiedName() +
target.syntheticNameChar() +
i);
ClassSymbol ctag = chk.getCompiled(topModle, flatname);
if (ctag == null)
! ctag = makeEmptyClass(STATIC | SYNTHETIC, topClass).sym;
else if (!ctag.isAnonymous())
continue;
// keep a record of all tags, to verify that all are generated as required
accessConstrTags = accessConstrTags.prepend(ctag);
return ctag;
Name flatname = names.fromString("" + topClass.getQualifiedName() +
target.syntheticNameChar() +
i);
ClassSymbol ctag = chk.getCompiled(topModle, flatname);
if (ctag == null)
! // IDENTITY_TYPE will be interpreted as ACC_SUPER for older class files so we are fine
+ ctag = makeEmptyClass(STATIC | SYNTHETIC | IDENTITY_TYPE, topClass).sym;
else if (!ctag.isAnonymous())
continue;
// keep a record of all tags, to verify that all are generated as required
accessConstrTags = accessConstrTags.prepend(ctag);
return ctag;
}
return proxyName;
}
/** Proxy definitions for all free variables in given list, in reverse order.
! * @param pos The source code position of the definition.
! * @param freevars The free variables.
! * @param owner The class in which the definitions go.
*/
List<JCVariableDecl> freevarDefs(int pos, List<VarSymbol> freevars, Symbol owner) {
return freevarDefs(pos, freevars, owner, LOCAL_CAPTURE_FIELD);
}
}
return proxyName;
}
/** Proxy definitions for all free variables in given list, in reverse order.
! * @param pos The source code position of the definition.
! * @param freevars The free variables.
! * @param owner The class in which the definitions go.
+ * @param additionalFlags Any additional flags
*/
List<JCVariableDecl> freevarDefs(int pos, List<VarSymbol> freevars, Symbol owner) {
return freevarDefs(pos, freevars, owner, LOCAL_CAPTURE_FIELD);
}
/** Definition for this$n field.
* @param pos The source code position of the definition.
* @param owner The class in which the definition goes.
*/
JCVariableDecl outerThisDef(int pos, ClassSymbol owner) {
! VarSymbol outerThis = makeOuterThisVarSymbol(owner, FINAL | SYNTHETIC);
return makeOuterThisVarDecl(pos, outerThis);
}
/** Return a list of trees that load the free variables in given list,
* in reverse order.
/** Definition for this$n field.
* @param pos The source code position of the definition.
* @param owner The class in which the definition goes.
*/
JCVariableDecl outerThisDef(int pos, ClassSymbol owner) {
! VarSymbol outerThis = makeOuterThisVarSymbol(owner, FINAL | SYNTHETIC | (allowValueClasses && owner.isValueClass() ? STRICT : 0));
return makeOuterThisVarDecl(pos, outerThis);
}
/** Return a list of trees that load the free variables in given list,
* in reverse order.
Scope s = clazz.members();
for (Symbol sym : s.getSymbols(NON_RECURSIVE))
if (sym.kind == TYP &&
sym.name == names.empty &&
(sym.flags() & INTERFACE) == 0) return (ClassSymbol) sym;
! return makeEmptyClass(STATIC | SYNTHETIC, clazz).sym;
}
/** Create an attributed tree of the form left.name(). */
private JCMethodInvocation makeCall(JCExpression left, Name name, List<JCExpression> args) {
Assert.checkNonNull(left.type);
Scope s = clazz.members();
for (Symbol sym : s.getSymbols(NON_RECURSIVE))
if (sym.kind == TYP &&
sym.name == names.empty &&
(sym.flags() & INTERFACE) == 0) return (ClassSymbol) sym;
! // IDENTITY_TYPE will be interpreted as ACC_SUPER for older class files so we are fine
+ return makeEmptyClass(STATIC | SYNTHETIC | IDENTITY_TYPE, clazz).sym;
}
/** Create an attributed tree of the form left.name(). */
private JCMethodInvocation makeCall(JCExpression left, Name name, List<JCExpression> args) {
Assert.checkNonNull(left.type);
/**Used to create an auxiliary class to hold $assertionsDisabled for interfaces.
*/
private ClassSymbol assertionsDisabledClass() {
if (assertionsDisabledClassCache != null) return assertionsDisabledClassCache;
! assertionsDisabledClassCache = makeEmptyClass(STATIC | SYNTHETIC, outermostClassDef.sym).sym;
return assertionsDisabledClassCache;
}
// This code is not particularly robust if the user has
/**Used to create an auxiliary class to hold $assertionsDisabled for interfaces.
*/
private ClassSymbol assertionsDisabledClass() {
if (assertionsDisabledClassCache != null) return assertionsDisabledClassCache;
! // IDENTITY_TYPE will be interpreted as ACC_SUPER for older class files so we are fine
+ assertionsDisabledClassCache = makeEmptyClass(STATIC | SYNTHETIC | IDENTITY_TYPE, outermostClassDef.sym).sym;
return assertionsDisabledClassCache;
}
// This code is not particularly robust if the user has
if (currentClass.hasOuterInstance())
otdef = outerThisDef(tree.pos, currentClass);
// If this is a local class, define proxies for all its free variables.
List<JCVariableDecl> fvdefs = freevarDefs(
! tree.pos, freevars(currentClass), currentClass);
// Recursively translate superclass, interfaces.
tree.extending = translate(tree.extending);
tree.implementing = translate(tree.implementing);
if (currentClass.hasOuterInstance())
otdef = outerThisDef(tree.pos, currentClass);
// If this is a local class, define proxies for all its free variables.
List<JCVariableDecl> fvdefs = freevarDefs(
! tree.pos, freevars(currentClass), currentClass, allowValueClasses && currentClass.isValueClass() ? STRICT : LOCAL_CAPTURE_FIELD);
// Recursively translate superclass, interfaces.
tree.extending = translate(tree.extending);
tree.implementing = translate(tree.implementing);
ListBuffer<VarSymbol> fields = new ListBuffer<>();
for (Symbol sym : currentClass.getEnclosedElements()) {
if (sym.kind == Kinds.Kind.VAR && ((sym.flags() & RECORD) != 0))
fields.append((VarSymbol) sym);
}
for (VarSymbol field: fields) {
if ((field.flags_field & Flags.UNINITIALIZED_FIELD) != 0) {
VarSymbol param = tree.params.stream().filter(p -> p.name == field.name).findFirst().get().sym;
make.at(tree.pos);
! tree.body.stats = tree.body.stats.append(
! make.Exec(
! make.Assign(
! make.Select(make.This(field.owner.erasure(types)), field),
- make.Ident(param)).setType(field.erasure(types))));
- // we don't need the flag at the field anymore
field.flags_field &= ~Flags.UNINITIALIZED_FIELD;
}
}
}
result = tree;
}
public void visitTypeCast(JCTypeCast tree) {
ListBuffer<VarSymbol> fields = new ListBuffer<>();
for (Symbol sym : currentClass.getEnclosedElements()) {
if (sym.kind == Kinds.Kind.VAR && ((sym.flags() & RECORD) != 0))
fields.append((VarSymbol) sym);
}
+ ListBuffer<JCStatement> initializers = new ListBuffer<>();
for (VarSymbol field: fields) {
if ((field.flags_field & Flags.UNINITIALIZED_FIELD) != 0) {
VarSymbol param = tree.params.stream().filter(p -> p.name == field.name).findFirst().get().sym;
make.at(tree.pos);
! initializers.add(make.Exec(
! make.Assign(
! make.Select(make.This(field.owner.erasure(types)), field),
! make.Ident(param)).setType(field.erasure(types))));
field.flags_field &= ~Flags.UNINITIALIZED_FIELD;
}
}
+ if (initializers.nonEmpty()) {
+ if (tree.sym.owner.isValueClass()) {
+ TreeInfo.mapSuperCalls(tree.body, supercall -> make.Block(0, initializers.toList().append(supercall)));
+ } else {
+ tree.body.stats = tree.body.stats.appendList(initializers);
+ }
+ }
}
result = tree;
}
public void visitTypeCast(JCTypeCast tree) {
// local class
thisArg = makeThis(tree.pos(), c.innermostAccessibleEnclosingClass());
} else {
// nested class
thisArg = makeOwnerThis(tree.pos(), c, false);
+ if (currentMethodSym != null &&
+ ((currentMethodSym.flags_field & (STATIC | BLOCK)) == BLOCK) &&
+ currentMethodSym.owner.isValueClass()) {
+ // instance initializer in a value class
+ Set<JCExpression> outerThisSet = initializerOuterThis.get(currentClass);
+ if (outerThisSet == null) {
+ outerThisSet = new HashSet<>();
+ }
+ outerThisSet.add(thisArg);
+ initializerOuterThis.put(currentClass, outerThisSet);
+ }
}
tree.args = tree.args.prepend(thisArg);
}
tree.encl = null;
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