com.sun.source.tree.LambdaExpressionTree.BodyKind Java Examples
The following examples show how to use
com.sun.source.tree.LambdaExpressionTree.BodyKind.
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Example #1
| Source File: Lambda.java From netbeans with Apache License 2.0 | 6 votes |
|
@Hint(displayName="#DN_expression2Return", description="#DESC_expression2Return", category="suggestions", hintKind=Hint.Kind.ACTION,
minSourceVersion = "8")
@Messages({
"DN_expression2Return=Convert Lambda Body to Use a Block",
"DESC_expression2Return=Converts lambda bodies to use blocks rather than expressions",
"ERR_expression2Return=",
"FIX_expression2Return=Use block as the lambda's body"
})
@TriggerPattern("($args$) -> $lambdaExpression")
public static ErrorDescription expression2Return(HintContext ctx) {
if (((LambdaExpressionTree) ctx.getPath().getLeaf()).getBodyKind() != BodyKind.EXPRESSION) {
return null;
}
TypeMirror lambdaExpressionType = ctx.getInfo().getTrees().getTypeMirror(ctx.getVariables().get("$lambdaExpression"));
String target = lambdaExpressionType == null || lambdaExpressionType.getKind() != TypeKind.VOID
? "($args$) -> { return $lambdaExpression; }"
: "($args$) -> { $lambdaExpression; }";
return ErrorDescriptionFactory.forTree(ctx, ctx.getPath(), Bundle.ERR_expression2Return(), JavaFixUtilities.rewriteFix(ctx, Bundle.FIX_expression2Return(), ctx.getPath(), target));
}
Example #2
| Source File: Flow.java From lua-for-android with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
@Override
public void visitLambda(JCLambda tree) {
final Bits prevUninits = new Bits(uninits);
final Bits prevInits = new Bits(inits);
int returnadrPrev = returnadr;
int nextadrPrev = nextadr;
ListBuffer<AssignPendingExit> prevPending = pendingExits;
try {
returnadr = nextadr;
pendingExits = new ListBuffer<>();
for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) {
JCVariableDecl def = l.head;
scan(def);
inits.incl(def.sym.adr);
uninits.excl(def.sym.adr);
}
if (tree.getBodyKind() == JCLambda.BodyKind.EXPRESSION) {
scanExpr(tree.body);
} else {
scan(tree.body);
}
}
finally {
returnadr = returnadrPrev;
uninits.assign(prevUninits);
inits.assign(prevInits);
pendingExits = prevPending;
nextadr = nextadrPrev;
}
}
Example #3
| Source File: ArgumentAttr.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
|
/** Check lambda against given target result */
private void checkLambdaCompatible(Type descriptor, ResultInfo resultInfo) {
CheckContext checkContext = resultInfo.checkContext;
ResultInfo bodyResultInfo = attr.lambdaBodyResult(speculativeTree, descriptor, resultInfo);
for (JCReturn ret : returnExpressions()) {
Type t = getReturnType(ret);
if (speculativeTree.getBodyKind() == BodyKind.EXPRESSION || !t.hasTag(VOID)) {
checkSpeculative(ret.expr, t, bodyResultInfo);
}
}
attr.checkLambdaCompatible(speculativeTree, descriptor, checkContext);
}
Example #4
| Source File: AssertCheckAnalyzer.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
|
boolean isSimpleStringArg(JCExpression e) {
switch (e.getTag()) {
case LAMBDA:
JCLambda lambda = (JCLambda)e;
return (lambda.getBodyKind() == BodyKind.EXPRESSION) &&
isSimpleStringArg((JCExpression)lambda.body);
default:
Symbol argSym = TreeInfo.symbolFor(e);
return (e.type.constValue() != null ||
(argSym != null && argSym.kind == Kinds.Kind.VAR));
}
}
Example #5
| Source File: Flow.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
|
@Override
public void visitLambda(JCLambda tree) {
if (inLambda || tree.getBodyKind() == BodyKind.EXPRESSION) {
return;
}
inLambda = true;
try {
super.visitLambda(tree);
} finally {
inLambda = false;
}
}
Example #6
| Source File: Flow.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
|
@Override
public void visitLambda(JCLambda tree) {
final Bits prevUninits = new Bits(uninits);
final Bits prevInits = new Bits(inits);
int returnadrPrev = returnadr;
int nextadrPrev = nextadr;
ListBuffer<AssignPendingExit> prevPending = pendingExits;
try {
returnadr = nextadr;
pendingExits = new ListBuffer<>();
for (List<JCVariableDecl> l = tree.params; l.nonEmpty(); l = l.tail) {
JCVariableDecl def = l.head;
scan(def);
inits.incl(def.sym.adr);
uninits.excl(def.sym.adr);
}
if (tree.getBodyKind() == JCLambda.BodyKind.EXPRESSION) {
scanExpr(tree.body);
} else {
scan(tree.body);
}
}
finally {
returnadr = returnadrPrev;
uninits.assign(prevUninits);
inits.assign(prevInits);
pendingExits = prevPending;
nextadr = nextadrPrev;
}
}
Example #7
| Source File: DeferredAttr.java From openjdk-jdk9 with GNU General Public License v2.0 | 5 votes |
|
/**
* Performs speculative attribution of a lambda body and returns the speculative lambda tree,
* in the absence of a target-type. Since {@link Attr#visitLambda(JCLambda)} cannot type-check
* lambda bodies w/o a suitable target-type, this routine 'unrolls' the lambda by turning it
* into a regular block, speculatively type-checks the block and then puts back the pieces.
*/
JCLambda attribSpeculativeLambda(JCLambda that, Env<AttrContext> env, ResultInfo resultInfo) {
ListBuffer<JCStatement> stats = new ListBuffer<>();
stats.addAll(that.params);
if (that.getBodyKind() == JCLambda.BodyKind.EXPRESSION) {
stats.add(make.Return((JCExpression)that.body));
} else {
stats.add((JCBlock)that.body);
}
JCBlock lambdaBlock = make.Block(0, stats.toList());
Env<AttrContext> localEnv = attr.lambdaEnv(that, env);
try {
localEnv.info.returnResult = resultInfo;
JCBlock speculativeTree = (JCBlock)attribSpeculative(lambdaBlock, localEnv, resultInfo);
List<JCVariableDecl> args = speculativeTree.getStatements().stream()
.filter(s -> s.hasTag(Tag.VARDEF))
.map(t -> (JCVariableDecl)t)
.collect(List.collector());
JCTree lambdaBody = speculativeTree.getStatements().last();
if (lambdaBody.hasTag(Tag.RETURN)) {
lambdaBody = ((JCReturn)lambdaBody).expr;
}
JCLambda speculativeLambda = make.Lambda(args, lambdaBody);
attr.preFlow(speculativeLambda);
flow.analyzeLambda(env, speculativeLambda, make, false);
return speculativeLambda;
} finally {
localEnv.info.scope.leave();
}
}
Example #8
| Source File: DeferredAttr.java From lua-for-android with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
/**
* Performs speculative attribution of a lambda body and returns the speculative lambda tree,
* in the absence of a target-type. Since {@link Attr#visitLambda(JCLambda)} cannot type-check
* lambda bodies w/o a suitable target-type, this routine 'unrolls' the lambda by turning it
* into a regular block, speculatively type-checks the block and then puts back the pieces.
*/
JCLambda attribSpeculativeLambda(JCLambda that, Env<AttrContext> env, ResultInfo resultInfo) {
ListBuffer<JCStatement> stats = new ListBuffer<>();
stats.addAll(that.params);
if (that.getBodyKind() == JCLambda.BodyKind.EXPRESSION) {
stats.add(make.Return((JCExpression)that.body));
} else {
stats.add((JCBlock)that.body);
}
JCBlock lambdaBlock = make.Block(0, stats.toList());
Env<AttrContext> localEnv = attr.lambdaEnv(that, env);
try {
localEnv.info.returnResult = resultInfo;
JCBlock speculativeTree = (JCBlock)attribSpeculative(lambdaBlock, localEnv, resultInfo);
List<JCVariableDecl> args = StreamSupport.stream(speculativeTree.getStatements())
.filter(s -> s.hasTag(Tag.VARDEF))
.map(t -> (JCVariableDecl)t)
.collect(List.collector());
JCTree lambdaBody = speculativeTree.getStatements().last();
if (lambdaBody.hasTag(Tag.RETURN)) {
lambdaBody = ((JCReturn)lambdaBody).expr;
}
JCLambda speculativeLambda = make.Lambda(args, lambdaBody);
attr.preFlow(speculativeLambda);
flow.analyzeLambda(env, speculativeLambda, make, false);
return speculativeLambda;
} finally {
localEnv.info.scope.leave();
}
}
Example #9
| Source File: Flow.java From lua-for-android with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
@Override
public void visitLambda(JCLambda tree) {
if (inLambda || tree.getBodyKind() == BodyKind.EXPRESSION) {
return;
}
inLambda = true;
try {
super.visitLambda(tree);
} finally {
inLambda = false;
}
}
Example #10
| Source File: ArgumentAttr.java From lua-for-android with BSD 3-Clause "New" or "Revised" License | 5 votes |
|
/** Check lambda against given target result */
private void checkLambdaCompatible(Type descriptor, ResultInfo resultInfo) {
CheckContext checkContext = resultInfo.checkContext;
ResultInfo bodyResultInfo = attr.lambdaBodyResult(speculativeTree, descriptor, resultInfo);
for (JCReturn ret : returnExpressions()) {
Type t = getReturnType(ret);
if (speculativeTree.getBodyKind() == BodyKind.EXPRESSION || !t.hasTag(VOID)) {
checkSpeculative(ret.expr, t, bodyResultInfo);
}
}
attr.checkLambdaCompatible(speculativeTree, descriptor, checkContext);
}
Example #11
| Source File: TreePruner.java From bazel with Apache License 2.0 | 5 votes |
|
@Override
public void visitLambda(JCLambda tree) {
if (tree.getBodyKind() == BodyKind.STATEMENT) {
JCExpression ident = make.at(tree).QualIdent(symtab.assertionErrorType.tsym);
JCThrow throwTree = make.Throw(make.NewClass(null, List.nil(), ident, List.nil(), null));
tree.body = make.Block(0, List.of(throwTree));
}
}
Example #12
| Source File: JCTree.java From openjdk-jdk8u-backup with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #13
| Source File: DeferredAttr.java From openjdk-jdk9 with GNU General Public License v2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment("incompatible.arg.types.in.lambda"));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("unexpected.ret.val"));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
"lambda.body.neither.value.nor.void.compatible");
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
}
}
}
}
Example #14
| Source File: JCTree.java From hottub with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #15
| Source File: DeferredAttr.java From hottub with GNU General Public License v2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment("incompatible.arg.types.in.lambda"));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("unexpected.ret.val"));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
"lambda.body.neither.value.nor.void.compatible");
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
}
}
}
}
Example #16
| Source File: JCTree.java From openjdk-8-source with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #17
| Source File: JCTree.java From openjdk-8 with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #18
| Source File: DeferredAttr.java From openjdk-jdk8u-backup with GNU General Public License v2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment("incompatible.arg.types.in.lambda"));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("unexpected.ret.val"));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
"lambda.body.neither.value.nor.void.compatible");
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
}
}
}
}
Example #19
| Source File: JCTree.java From TencentKona-8 with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #20
| Source File: VeryPretty.java From netbeans with Apache License 2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
boolean useParens = cs.parensAroundSingularLambdaParam() ||
tree.params.size() != 1 ||
tree.paramKind != JCLambda.ParameterKind.IMPLICIT;
if (useParens) {
print(cs.spaceWithinLambdaParens() && tree.params.nonEmpty() ? "( " : "(");
}
boolean oldPrintingMethodParams = printingMethodParams;
printingMethodParams = true;
suppressVariableType = tree.paramKind == JCLambda.ParameterKind.IMPLICIT;
wrapTrees(tree.params, cs.wrapLambdaParams(), cs.alignMultilineLambdaParams()
? out.col : out.leftMargin + cs.getContinuationIndentSize(),
true);
suppressVariableType = false;
printingMethodParams = oldPrintingMethodParams;
if (useParens) {
if (cs.spaceWithinLambdaParens() && tree.params.nonEmpty())
needSpace();
print(')');
}
print(cs.spaceAroundLambdaArrow() ? " ->" : "->");
if (tree.getBodyKind() == BodyKind.STATEMENT) {
printBlock(tree.body, cs.getOtherBracePlacement(), cs.spaceAroundLambdaArrow());
} else {
int rm = cs.getRightMargin();
switch(cs.wrapBinaryOps()) {
case WRAP_IF_LONG:
if (widthEstimator.estimateWidth(tree.body, rm - out.col) + out.col <= cs.getRightMargin()) {
if(cs.spaceAroundLambdaArrow())
print(' ');
break;
}
case WRAP_ALWAYS:
newline();
toColExactly(out.leftMargin + cs.getContinuationIndentSize());
break;
case WRAP_NEVER:
if(cs.spaceAroundLambdaArrow())
print(' ');
break;
}
printExpr(tree.body, TreeInfo.notExpression);
}
}
Example #21
| Source File: DeferredAttr.java From lua-for-android with BSD 3-Clause "New" or "Revised" License | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment(Fragments.IncompatibleArgTypesInLambda));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment(Fragments.IncompatibleRetTypeInLambda(Fragments.MissingRetVal(currentReturnType))));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment(Fragments.UnexpectedRetVal));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
Errors.LambdaBodyNeitherValueNorVoidCompatible);
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment(Fragments.IncompatibleRetTypeInLambda(Fragments.MissingRetVal(currentReturnType))));
}
}
}
}
}
Example #22
| Source File: DeferredAttr.java From openjdk-jdk8u with GNU General Public License v2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment("incompatible.arg.types.in.lambda"));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("unexpected.ret.val"));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
"lambda.body.neither.value.nor.void.compatible");
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
}
}
}
}
Example #23
| Source File: JCTree.java From openjdk-jdk8u with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #24
| Source File: DeferredAttr.java From jdk8u60 with GNU General Public License v2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment("incompatible.arg.types.in.lambda"));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("unexpected.ret.val"));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
"lambda.body.neither.value.nor.void.compatible");
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
}
}
}
}
Example #25
| Source File: JCTree.java From jdk8u60 with GNU General Public License v2.0 | 4 votes |
|
@Override
public BodyKind getBodyKind() {
return body.hasTag(BLOCK) ?
BodyKind.STATEMENT :
BodyKind.EXPRESSION;
}
Example #26
| Source File: DeferredAttr.java From TencentKona-8 with GNU General Public License v2.0 | 4 votes |
|
@Override
public void visitLambda(JCLambda tree) {
Check.CheckContext checkContext = resultInfo.checkContext;
Type pt = resultInfo.pt;
if (!inferenceContext.inferencevars.contains(pt)) {
//must be a functional descriptor
Type descriptorType = null;
try {
descriptorType = types.findDescriptorType(pt);
} catch (Types.FunctionDescriptorLookupError ex) {
checkContext.report(null, ex.getDiagnostic());
}
if (descriptorType.getParameterTypes().length() != tree.params.length()) {
checkContext.report(tree,
diags.fragment("incompatible.arg.types.in.lambda"));
}
Type currentReturnType = descriptorType.getReturnType();
boolean returnTypeIsVoid = currentReturnType.hasTag(VOID);
if (tree.getBodyKind() == BodyKind.EXPRESSION) {
boolean isExpressionCompatible = !returnTypeIsVoid ||
TreeInfo.isExpressionStatement((JCExpression)tree.getBody());
if (!isExpressionCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
} else {
LambdaBodyStructChecker lambdaBodyChecker =
new LambdaBodyStructChecker();
tree.body.accept(lambdaBodyChecker);
boolean isVoidCompatible = lambdaBodyChecker.isVoidCompatible;
if (returnTypeIsVoid) {
if (!isVoidCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("unexpected.ret.val"));
}
} else {
boolean isValueCompatible = lambdaBodyChecker.isPotentiallyValueCompatible
&& !canLambdaBodyCompleteNormally(tree);
if (!isValueCompatible && !isVoidCompatible) {
log.error(tree.body.pos(),
"lambda.body.neither.value.nor.void.compatible");
}
if (!isValueCompatible) {
resultInfo.checkContext.report(tree.pos(),
diags.fragment("incompatible.ret.type.in.lambda",
diags.fragment("missing.ret.val", currentReturnType)));
}
}
}
}
}
