8194892: add compiler support for local-variable syntax for lambda parameters
Reviewed-by: mcimadamore
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java Tue Feb 20 07:51:51 2018 -0800
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java Tue Feb 20 11:45:16 2018 -0500
@@ -43,11 +43,10 @@
import com.sun.tools.javac.tree.JCTree.*;
import com.sun.tools.javac.util.*;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag;
-import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
import com.sun.tools.javac.util.JCDiagnostic.Error;
import com.sun.tools.javac.util.JCDiagnostic.Warning;
+import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.JCDiagnostic.Fragment;
-import com.sun.tools.javac.util.List;
import static com.sun.tools.javac.parser.Tokens.TokenKind.*;
import static com.sun.tools.javac.parser.Tokens.TokenKind.ASSERT;
@@ -290,9 +289,31 @@
/** Skip forward until a suitable stop token is found.
*/
- protected void skip(boolean stopAtImport, boolean stopAtMemberDecl, boolean stopAtIdentifier, boolean stopAtStatement) {
+ protected void skip(boolean stopAtImport, boolean stopAtMemberDecl, boolean stopAtIdentifier, boolean stopAtStatement, boolean stopAtLambdaBody) {
while (true) {
switch (token.kind) {
+ case ARROW:
+ if (stopAtLambdaBody) {
+ //find end of lambda expression; this could be either a comma or an rparen (if in method context),
+ //or a semi colon (if in assignment context).
+ int depth = 0;
+ while (true) {
+ switch (token.kind) {
+ case EOF:
+ case LBRACE: depth++; break;
+ case RBRACE: depth--; break;
+ case COMMA:
+ case RPAREN:
+ case SEMI:
+ if (depth == 0) {
+ return;
+ }
+ break;
+ }
+ nextToken();
+ }
+ }
+ break;
case SEMI:
nextToken();
return;
@@ -1076,7 +1097,8 @@
break;
case LPAREN:
if (typeArgs == null && (mode & EXPR) != 0) {
- ParensResult pres = analyzeParens();
+ LambdaClassfier lambdaClassifier = new LambdaClassfier();
+ ParensResult pres = analyzeParens(lambdaClassifier);
switch (pres) {
case CAST:
accept(LPAREN);
@@ -1095,9 +1117,15 @@
mode = EXPR;
JCExpression t1 = term3();
return F.at(pos).TypeCast(t, t1);
+ case BAD_LAMBDA:
+ Assert.checkNonNull(lambdaClassifier.diagFragment);
+ t = syntaxError(pos, List.nil(), Errors.InvalidLambdaParameterDeclaration(lambdaClassifier.diagFragment));
+ skip(false, false, false, false, true);
+ break;
case IMPLICIT_LAMBDA:
case EXPLICIT_LAMBDA:
- t = lambdaExpressionOrStatement(true, pres == ParensResult.EXPLICIT_LAMBDA, pos);
+ case IMPLICIT_LAMBDA_ALL_VAR:
+ t = lambdaExpressionOrStatement(true, pres != ParensResult.IMPLICIT_LAMBDA, pos);
break;
default: //PARENS
accept(LPAREN);
@@ -1509,15 +1537,17 @@
* matching '>' and see if the subsequent terminal is either '.' or '::'.
*/
@SuppressWarnings("fallthrough")
- ParensResult analyzeParens() {
+ ParensResult analyzeParens(LambdaClassfier lambdaClassifier) {
int depth = 0;
boolean type = false;
outer: for (int lookahead = 0 ; ; lookahead++) {
- TokenKind tk = S.token(lookahead).kind;
+ Token lookaheadToken = S.token(lookahead);
+ TokenKind tk = lookaheadToken.kind;
switch (tk) {
case COMMA:
type = true;
- case EXTENDS: case SUPER: case DOT: case AMP:
+ break;
+ case FINAL: case EXTENDS: case SUPER: case DOT: case AMP:
//skip
break;
case QUES:
@@ -1534,7 +1564,8 @@
return ParensResult.CAST;
} else if (peekToken(lookahead, LAX_IDENTIFIER)) {
//Type, Identifier/'_'/'assert'/'enum' -> explicit lambda
- return ParensResult.EXPLICIT_LAMBDA;
+ lambdaClassifier.addExplicitParameter();
+ lookahead++; //skip Identifier
}
break;
case LPAREN:
@@ -1547,24 +1578,29 @@
}
break;
case RPAREN:
- // if we have seen something that looks like a type,
- // then it's a cast expression
- if (type) return ParensResult.CAST;
- // otherwise, disambiguate cast vs. parenthesized expression
- // based on subsequent token.
- switch (S.token(lookahead + 1).kind) {
- /*case PLUSPLUS: case SUBSUB: */
- case BANG: case TILDE:
- case LPAREN: case THIS: case SUPER:
- case INTLITERAL: case LONGLITERAL: case FLOATLITERAL:
- case DOUBLELITERAL: case CHARLITERAL: case STRINGLITERAL:
- case TRUE: case FALSE: case NULL:
- case NEW: case IDENTIFIER: case ASSERT: case ENUM: case UNDERSCORE:
- case BYTE: case SHORT: case CHAR: case INT:
- case LONG: case FLOAT: case DOUBLE: case BOOLEAN: case VOID:
- return ParensResult.CAST;
- default:
- return ParensResult.PARENS;
+ if (peekToken(lookahead, ARROW)) {
+ //this is a lambda
+ return lambdaClassifier.result();
+ } else {
+ // if we have seen something that looks like a type,
+ // then it's a cast expression
+ if (type) return ParensResult.CAST;
+ // otherwise, disambiguate cast vs. parenthesized expression
+ // based on subsequent token.
+ switch (S.token(lookahead + 1).kind) {
+ /*case PLUSPLUS: case SUBSUB: */
+ case BANG: case TILDE:
+ case LPAREN: case THIS: case SUPER:
+ case INTLITERAL: case LONGLITERAL: case FLOATLITERAL:
+ case DOUBLELITERAL: case CHARLITERAL: case STRINGLITERAL:
+ case TRUE: case FALSE: case NULL:
+ case NEW: case IDENTIFIER: case ASSERT: case ENUM: case UNDERSCORE:
+ case BYTE: case SHORT: case CHAR: case INT:
+ case LONG: case FLOAT: case DOUBLE: case BOOLEAN: case VOID:
+ return ParensResult.CAST;
+ default:
+ return ParensResult.PARENS;
+ }
}
case UNDERSCORE:
case ASSERT:
@@ -1572,17 +1608,23 @@
case IDENTIFIER:
if (peekToken(lookahead, LAX_IDENTIFIER)) {
// Identifier, Identifier/'_'/'assert'/'enum' -> explicit lambda
- return ParensResult.EXPLICIT_LAMBDA;
- } else if (peekToken(lookahead, RPAREN, ARROW)) {
- // Identifier, ')' '->' -> implicit lambda
- return ParensResult.IMPLICIT_LAMBDA;
+ if (Feature.LOCAL_VARIABLE_TYPE_INFERENCE.allowedInSource(source) &&
+ lookaheadToken.name() == names.var) {
+ lambdaClassifier.addImplicitVarParameter();
+ } else {
+ lambdaClassifier.addExplicitParameter();
+ }
+ lookahead++; //skip Identifier
+ } else if ((!type && peekToken(lookahead, COMMA)) || peekToken(lookahead, RPAREN)) {
+ lambdaClassifier.addImplicitParameter();
}
type = false;
break;
- case FINAL:
case ELLIPSIS:
- //those can only appear in explicit lambdas
- return ParensResult.EXPLICIT_LAMBDA;
+ //those can only appear in explicit, non-var, lambdas
+ lambdaClassifier.addExplicitParameter();
+ lookahead++; //skip Identifier
+ break;
case MONKEYS_AT:
type = true;
lookahead += 1; //skip '@'
@@ -1614,7 +1656,9 @@
case LBRACKET:
if (peekToken(lookahead, RBRACKET, LAX_IDENTIFIER)) {
// '[', ']', Identifier/'_'/'assert'/'enum' -> explicit lambda
- return ParensResult.EXPLICIT_LAMBDA;
+ lambdaClassifier.addExplicitParameter();
+ lookahead += 2; //skip ']' Identifier
+ break;
} else if (peekToken(lookahead, RBRACKET, RPAREN) ||
peekToken(lookahead, RBRACKET, AMP)) {
// '[', ']', ')' -> cast
@@ -1643,12 +1687,15 @@
// '>', '&' -> cast
return ParensResult.CAST;
} else if (peekToken(lookahead, LAX_IDENTIFIER, COMMA) ||
- peekToken(lookahead, LAX_IDENTIFIER, RPAREN, ARROW) ||
- peekToken(lookahead, ELLIPSIS)) {
+ peekToken(lookahead, LAX_IDENTIFIER, RPAREN, ARROW)) {
// '>', Identifier/'_'/'assert'/'enum', ',' -> explicit lambda
// '>', Identifier/'_'/'assert'/'enum', ')', '->' -> explicit lambda
+ lambdaClassifier.addExplicitParameter();
+ lookahead++; //skip Identifier
+ break;
+ } else if (peekToken(lookahead, ELLIPSIS)) {
// '>', '...' -> explicit lambda
- return ParensResult.EXPLICIT_LAMBDA;
+ break; //this is handled in the outer switch
}
//it looks a type, but could still be (i) a cast to generic type,
//(ii) an unbound method reference or (iii) an explicit lambda
@@ -1666,6 +1713,61 @@
}
}
+ class LambdaClassfier {
+ ParensResult kind;
+ Fragment diagFragment;
+
+ void addExplicitParameter() {
+ reduce(ParensResult.EXPLICIT_LAMBDA);
+ }
+
+ void addImplicitVarParameter() {
+ reduce(ParensResult.IMPLICIT_LAMBDA_ALL_VAR);
+ }
+
+ void addImplicitParameter() {
+ reduce(ParensResult.IMPLICIT_LAMBDA);
+ }
+
+ private void reduce(ParensResult newKind) {
+ if (kind == null) {
+ kind = newKind;
+ } else if (kind != newKind && kind != ParensResult.BAD_LAMBDA) {
+ ParensResult currentKind = kind;
+ kind = ParensResult.BAD_LAMBDA;
+ switch (currentKind) {
+ case EXPLICIT_LAMBDA:
+ if (newKind == ParensResult.IMPLICIT_LAMBDA) {
+ diagFragment = Fragments.ImplicitAndExplicitNotAllowed;
+ } else if (newKind == ParensResult.IMPLICIT_LAMBDA_ALL_VAR) {
+ diagFragment = Fragments.VarAndExplicitNotAllowed;
+ }
+ break;
+ case IMPLICIT_LAMBDA:
+ if (newKind == ParensResult.EXPLICIT_LAMBDA) {
+ diagFragment = Fragments.ImplicitAndExplicitNotAllowed;
+ } else if (newKind == ParensResult.IMPLICIT_LAMBDA_ALL_VAR) {
+ diagFragment = Fragments.VarAndImplicitNotAllowed;
+ }
+ break;
+ case IMPLICIT_LAMBDA_ALL_VAR:
+ if (newKind == ParensResult.EXPLICIT_LAMBDA) {
+ diagFragment = Fragments.VarAndExplicitNotAllowed;
+ } else if (newKind == ParensResult.IMPLICIT_LAMBDA) {
+ diagFragment = Fragments.VarAndImplicitNotAllowed;
+ }
+ break;
+ default:
+ throw new AssertionError("unexpected option for field kind");
+ }
+ }
+ }
+
+ ParensResult result() {
+ return kind;
+ }
+ }
+
/** Accepts all identifier-like tokens */
protected Filter<TokenKind> LAX_IDENTIFIER = t -> t == IDENTIFIER || t == UNDERSCORE || t == ASSERT || t == ENUM;
@@ -1673,7 +1775,15 @@
CAST,
EXPLICIT_LAMBDA,
IMPLICIT_LAMBDA,
- PARENS
+ IMPLICIT_LAMBDA_ALL_VAR,
+ BAD_LAMBDA,
+ PARENS;
+ }
+
+ enum BAD_LAMBDA_KIND {
+ EXPLICIT_AND_VAR,
+ IMPLICIT_AND_VAR,
+ EXPLICIT_AND_IMPLICIT,
}
JCExpression lambdaExpressionOrStatement(boolean hasParens, boolean explicitParams, int pos) {
@@ -1896,6 +2006,9 @@
List<JCAnnotation> nextLevelAnnotations = typeAnnotationsOpt();
if (token.kind == LBRACKET) {
+ if (t == null) {
+ log.error(token.pos, Errors.VarNotAllowedArray);
+ }
int pos = token.pos;
nextToken();
t = bracketsOptCont(t, pos, nextLevelAnnotations);
@@ -2294,7 +2407,7 @@
if (token.pos == lastErrPos)
return stats.toList();
if (token.pos <= endPosTable.errorEndPos) {
- skip(false, true, true, true);
+ skip(false, true, true, true, false);
lastErrPos = token.pos;
}
stats.addAll(stat);
@@ -3133,7 +3246,7 @@
while (token.kind != EOF) {
if (token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(checkForImports, false, false, false);
+ skip(checkForImports, false, false, false, false);
if (token.kind == EOF)
break;
}
@@ -3270,7 +3383,7 @@
defs.append(toP(F.at(pos).Provides(serviceName, implNames)));
} else {
log.error(DiagnosticFlag.SYNTAX, token.pos, Errors.ExpectedStr("'" + names.with + "'"));
- skip(false, false, false, false);
+ skip(false, false, false, false, false);
}
} else if (token.name() == names.uses) {
nextToken();
@@ -3475,7 +3588,7 @@
false));
if (token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(false, true, true, false);
+ skip(false, true, true, false, false);
}
}
}
@@ -3537,7 +3650,7 @@
accept(LBRACE);
if (token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(false, true, false, false);
+ skip(false, true, false, false, false);
if (token.kind == LBRACE)
nextToken();
}
@@ -3546,7 +3659,7 @@
defs.appendList(classOrInterfaceBodyDeclaration(className, isInterface));
if (token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(false, true, true, false);
+ skip(false, true, true, false, false);
}
}
accept(RBRACE);
@@ -3713,7 +3826,7 @@
accept(SEMI);
if (token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(false, true, false, false);
+ skip(false, true, false, false, false);
if (token.kind == LBRACE) {
body = block();
}
@@ -3947,7 +4060,7 @@
// need to distinguish between vararg annos and array annos
// look at typeAnnotationsPushedBack comment
this.permitTypeAnnotationsPushBack = true;
- JCExpression type = parseType();
+ JCExpression type = parseType(lambdaParameter);
this.permitTypeAnnotationsPushBack = false;
if (token.kind == ELLIPSIS) {
@@ -3964,6 +4077,10 @@
}
typeAnnotationsPushedBack = List.nil();
}
+ if (lambdaParameter && isRestrictedLocalVarTypeName(type)) {
+ //implicit lambda parameter type (with 'var')
+ type = null;
+ }
return variableDeclaratorId(mods, type, lambdaParameter);
}
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties Tue Feb 20 07:51:51 2018 -0800
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties Tue Feb 20 11:45:16 2018 -0500
@@ -1229,6 +1229,20 @@
compiler.err.var.not.allowed.compound=\
''var'' is not allowed in a compound declaration
+# 0: fragment
+compiler.err.invalid.lambda.parameter.declaration=\
+ invalid lambda parameter declaration\n\
+ ({0})
+
+compiler.misc.implicit.and.explicit.not.allowed=\
+ cannot mix implicitly-typed and explicitly-typed parameters
+
+compiler.misc.var.and.explicit.not.allowed=\
+ cannot mix ''var'' and explicitly-typed parameters
+
+compiler.misc.var.and.implicit.not.allowed=\
+ cannot mix ''var'' and implicitly-typed parameters
+
compiler.misc.local.cant.infer.null=\
variable initializer is ''null''
--- a/src/jdk.jshell/share/classes/jdk/jshell/ReplParser.java Tue Feb 20 07:51:51 2018 -0800
+++ b/src/jdk.jshell/share/classes/jdk/jshell/ReplParser.java Tue Feb 20 11:45:16 2018 -0500
@@ -104,7 +104,7 @@
while (token.kind != EOF) {
if (token.pos > 0 && token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(true, false, false, false);
+ skip(true, false, false, false, false);
if (token.kind == EOF) {
break;
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/diags/examples/BracketsNotAllowedImplicitLambda.java Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// key: compiler.err.var.not.allowed.array
+
+import java.util.function.*;
+
+class BracketsNotAllowedImplicitLambda {
+ BiFunction<String[], String, String> f = (var s1[], var s2) -> s2;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/diags/examples/ExplicitImplicitLambda.java Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// key: compiler.err.invalid.lambda.parameter.declaration
+// key: compiler.misc.implicit.and.explicit.not.allowed
+
+import java.util.function.*;
+
+class ExplicitImplicitLambda {
+ IntBinaryOperator f = (int x, y) -> x + y;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/diags/examples/VarAllOrNothing.java Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// key: compiler.err.invalid.lambda.parameter.declaration
+// key: compiler.misc.var.and.implicit.not.allowed
+
+import java.util.function.*;
+
+class VarAllOrNothing {
+ IntBinaryOperator f = (x, var y) -> x + y;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/diags/examples/VarExplicitLambda.java Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// key: compiler.err.invalid.lambda.parameter.declaration
+// key: compiler.misc.var.and.explicit.not.allowed
+
+import java.util.function.*;
+
+class VarExplicitLambda {
+ IntBinaryOperator f = (int x, var y) -> x + y;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/diags/examples/VarNotAllowedExplicitLambda.java Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+// key: compiler.err.invalid.lambda.parameter.declaration
+// key: compiler.misc.var.and.explicit.not.allowed
+
+class VarNotAllowedExplicitLambda {
+ F f = (String s, var v)->{};
+}
--- a/test/langtools/tools/javac/lambda/8131742/T8131742.out Tue Feb 20 07:51:51 2018 -0800
+++ b/test/langtools/tools/javac/lambda/8131742/T8131742.out Tue Feb 20 11:45:16 2018 -0500
@@ -1,4 +1,4 @@
-T8131742.java:8:38: compiler.err.expected3: ',', ')', '['
+T8131742.java:8:31: compiler.err.expected: ')'
T8131742.java:8:39: compiler.err.this.as.identifier
-T8131742.java:8:43: compiler.err.expected: ';'
+T8131742.java:8:43: compiler.err.expected: token.identifier
3 errors
--- a/test/langtools/tools/javac/lambda/LambdaParserTest.java Tue Feb 20 07:51:51 2018 -0800
+++ b/test/langtools/tools/javac/lambda/LambdaParserTest.java Tue Feb 20 11:45:16 2018 -0500
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -40,6 +40,7 @@
*/
import java.io.IOException;
+import java.util.Arrays;
import combo.ComboInstance;
import combo.ComboParameter;
@@ -105,26 +106,44 @@
}
}
+ enum SourceKind {
+ SOURCE_9("9"),
+ SOURCE_10("10");
+
+ String sourceNumber;
+
+ SourceKind(String sourceNumber) {
+ this.sourceNumber = sourceNumber;
+ }
+ }
+
enum LambdaParameterKind implements ComboParameter {
- IMPLICIT(""),
- EXPLIICT_SIMPLE("A"),
- EXPLIICT_SIMPLE_ARR1("A[]"),
- EXPLIICT_SIMPLE_ARR2("A[][]"),
- EXPLICIT_VARARGS("A..."),
- EXPLICIT_GENERIC1("A<X>"),
- EXPLICIT_GENERIC2("A<? extends X, ? super Y>"),
- EXPLICIT_GENERIC2_VARARGS("A<? extends X, ? super Y>..."),
- EXPLICIT_GENERIC2_ARR1("A<? extends X, ? super Y>[]"),
- EXPLICIT_GENERIC2_ARR2("A<? extends X, ? super Y>[][]");
+
+ IMPLICIT_1("", ExplicitKind.IMPLICIT),
+ IMPLICIT_2("var", ExplicitKind.IMPLICIT_VAR),
+ EXPLIICT_SIMPLE("A", ExplicitKind.EXPLICIT),
+ EXPLIICT_SIMPLE_ARR1("A[]", ExplicitKind.EXPLICIT),
+ EXPLIICT_SIMPLE_ARR2("A[][]", ExplicitKind.EXPLICIT),
+ EXPLICIT_VARARGS("A...", ExplicitKind.EXPLICIT),
+ EXPLICIT_GENERIC1("A<X>", ExplicitKind.EXPLICIT),
+ EXPLICIT_GENERIC2("A<? extends X, ? super Y>", ExplicitKind.EXPLICIT),
+ EXPLICIT_GENERIC2_VARARGS("A<? extends X, ? super Y>...", ExplicitKind.EXPLICIT),
+ EXPLICIT_GENERIC2_ARR1("A<? extends X, ? super Y>[]", ExplicitKind.EXPLICIT),
+ EXPLICIT_GENERIC2_ARR2("A<? extends X, ? super Y>[][]", ExplicitKind.EXPLICIT);
+
+ enum ExplicitKind {
+ IMPLICIT,
+ IMPLICIT_VAR,
+ EXPLICIT;
+ }
String parameterType;
+ ExplicitKind explicitKind;
- LambdaParameterKind(String parameterType) {
+
+ LambdaParameterKind(String parameterType, ExplicitKind ekind) {
this.parameterType = parameterType;
- }
-
- boolean explicit() {
- return this != IMPLICIT;
+ this.explicitKind = ekind;
}
boolean isVarargs() {
@@ -136,12 +155,23 @@
public String expand(String optParameter) {
return parameterType;
}
+
+ ExplicitKind explicitKind(SourceKind sk) {
+ switch (explicitKind) {
+ case IMPLICIT_VAR:
+ return (sk == SourceKind.SOURCE_9) ?
+ ExplicitKind.EXPLICIT : ExplicitKind.IMPLICIT_VAR;
+ default:
+ return explicitKind;
+ }
+ }
}
enum ModifierKind implements ComboParameter {
NONE(""),
FINAL("final"),
- PUBLIC("public");
+ PUBLIC("public"),
+ ANNO("@A");
String modifier;
@@ -152,7 +182,8 @@
boolean compatibleWith(LambdaParameterKind pk) {
switch (this) {
case PUBLIC: return false;
- case FINAL: return pk != LambdaParameterKind.IMPLICIT;
+ case ANNO:
+ case FINAL: return pk != LambdaParameterKind.IMPLICIT_1;
case NONE: return true;
default: throw new AssertionError("Invalid modifier kind " + this);
}
@@ -208,6 +239,7 @@
new ComboTestHelper<LambdaParserTest>()
.withFilter(LambdaParserTest::redundantTestFilter)
.withFilter(LambdaParserTest::badImplicitFilter)
+ .withDimension("SOURCE", (x, sk) -> x.sk = sk, SourceKind.values())
.withDimension("LAMBDA", (x, lk) -> x.lk = lk, LambdaKind.values())
.withDimension("NAME", (x, name) -> x.pn = name, LambdaParameterName.values())
.withArrayDimension("TYPE", (x, type, idx) -> x.pks[idx] = type, 2, LambdaParameterKind.values())
@@ -221,6 +253,7 @@
ModifierKind[] mks = new ModifierKind[2];
LambdaKind lk;
LambdaParameterName pn;
+ SourceKind sk;
boolean badImplicitFilter() {
return !(mks[0] != ModifierKind.NONE && lk.isShort());
@@ -240,13 +273,15 @@
return true;
}
- String template = "class Test {\n" +
- " SAM s = #{EXPR};\n" +
- "}";
+ String template = "@interface A { }\n" +
+ "class Test {\n" +
+ " SAM s = #{EXPR};\n" +
+ "}";
@Override
public void doWork() throws IOException {
newCompilationTask()
+ .withOptions(Arrays.asList("-source", sk.sourceNumber))
.withSourceFromTemplate(template)
.parse(this::check);
}
@@ -256,7 +291,7 @@
(lk.arity() > 1 && !mks[1].compatibleWith(pks[1]));
if (lk.arity() == 2 &&
- (pks[0].explicit() != pks[1].explicit() ||
+ (pks[0].explicitKind(sk) != pks[1].explicitKind(sk) ||
pks[0].isVarargs())) {
errorExpected = true;
}
--- a/test/langtools/tools/javac/lvti/ParserTest.java Tue Feb 20 07:51:51 2018 -0800
+++ b/test/langtools/tools/javac/lvti/ParserTest.java Tue Feb 20 11:45:16 2018 -0500
@@ -60,7 +60,7 @@
List<? extends var> l2; //error
List<? super var> l3; //error
try {
- Function<var, String> f = (var x2) -> ""; //error
+ Function<var, String> f = (var x2) -> ""; //ok
} catch (var ex) { } //error
}
--- a/test/langtools/tools/javac/lvti/ParserTest.out Tue Feb 20 07:51:51 2018 -0800
+++ b/test/langtools/tools/javac/lvti/ParserTest.out Tue Feb 20 11:45:16 2018 -0500
@@ -18,8 +18,7 @@
ParserTest.java:60:24: compiler.err.var.not.allowed.here
ParserTest.java:61:22: compiler.err.var.not.allowed.here
ParserTest.java:63:22: compiler.err.var.not.allowed.here
-ParserTest.java:63:40: compiler.err.var.not.allowed.here
ParserTest.java:64:18: compiler.err.var.not.allowed.here
ParserTest.java:68:35: compiler.err.var.not.allowed.here
ParserTest.java:69:22: compiler.err.var.not.allowed.here
-24 errors
+23 errors
--- a/test/langtools/tools/javac/parser/extend/TrialParser.java Tue Feb 20 07:51:51 2018 -0800
+++ b/test/langtools/tools/javac/parser/extend/TrialParser.java Tue Feb 20 11:45:16 2018 -0500
@@ -104,7 +104,7 @@
while (token.kind != EOF) {
if (token.pos > 0 && token.pos <= endPosTable.errorEndPos) {
// error recovery
- skip(true, false, false, false);
+ skip(true, false, false, false, false);
if (token.kind == EOF) {
break;
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/var_implicit_lambda/VarInImplicitLambdaNegTest01.java Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,17 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8194892
+ * @summary add compiler support for local-variable syntax for lambda parameters
+ * @compile/fail/ref=VarInImplicitLambdaNegTest01.out -XDrawDiagnostics VarInImplicitLambdaNegTest01.java
+ */
+
+import java.util.function.*;
+
+class VarInImplicitLambdaNegTest01 {
+ IntBinaryOperator f1 = (x, var y) -> x + y;
+ IntBinaryOperator f2 = (var x, y) -> x + y;
+ IntBinaryOperator f3 = (int x, var y) -> x + y;
+ IntBinaryOperator f4 = (int x, y) -> x + y;
+
+ BiFunction<String[], String, String> f5 = (var s1[], var s2) -> s2;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/var_implicit_lambda/VarInImplicitLambdaNegTest01.out Tue Feb 20 11:45:16 2018 -0500
@@ -0,0 +1,6 @@
+VarInImplicitLambdaNegTest01.java:11:28: compiler.err.invalid.lambda.parameter.declaration: (compiler.misc.var.and.implicit.not.allowed)
+VarInImplicitLambdaNegTest01.java:12:28: compiler.err.invalid.lambda.parameter.declaration: (compiler.misc.var.and.implicit.not.allowed)
+VarInImplicitLambdaNegTest01.java:13:28: compiler.err.invalid.lambda.parameter.declaration: (compiler.misc.var.and.explicit.not.allowed)
+VarInImplicitLambdaNegTest01.java:14:28: compiler.err.invalid.lambda.parameter.declaration: (compiler.misc.implicit.and.explicit.not.allowed)
+VarInImplicitLambdaNegTest01.java:16:54: compiler.err.var.not.allowed.array
+5 errors