author | darcy |
Tue, 11 Jun 2019 16:45:20 -0700 | |
changeset 55382 | 30b1b7b4dd86 |
parent 55318 | 040e1c6dab96 |
child 58679 | 9c3209ff7550 |
child 59068 | dc45ed0ab083 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.tools.javac.code; |
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import java.util.*; |
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import javax.lang.model.SourceVersion; |
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import static javax.lang.model.SourceVersion.*; |
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import com.sun.tools.javac.jvm.Target; |
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import com.sun.tools.javac.resources.CompilerProperties.Errors; |
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import com.sun.tools.javac.resources.CompilerProperties.Fragments; |
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import com.sun.tools.javac.util.*; |
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import com.sun.tools.javac.util.JCDiagnostic.Error; |
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import com.sun.tools.javac.util.JCDiagnostic.Fragment; |
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import static com.sun.tools.javac.main.Option.*; |
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/** The source language version accepted. |
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* |
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* <p><b>This is NOT part of any supported API. |
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* If you write code that depends on this, you do so at your own risk. |
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* This code and its internal interfaces are subject to change or |
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* deletion without notice.</b> |
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*/ |
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public enum Source { |
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/** 1.0 had no inner classes, and so could not pass the JCK. */ |
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// public static final Source JDK1_0 = new Source("1.0"); |
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/** 1.1 did not have strictfp, and so could not pass the JCK. */ |
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// public static final Source JDK1_1 = new Source("1.1"); |
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/** 1.2 introduced strictfp. */ |
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JDK1_2("1.2"), |
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/** 1.3 is the same language as 1.2. */ |
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JDK1_3("1.3"), |
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/** 1.4 introduced assert. */ |
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JDK1_4("1.4"), |
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/** 1.5 introduced generics, attributes, foreach, boxing, static import, |
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* covariant return, enums, varargs, et al. */ |
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JDK5("5"), |
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/** 1.6 reports encoding problems as errors instead of warnings. */ |
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JDK6("6"), |
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/** 1.7 introduced try-with-resources, multi-catch, string switch, etc. */ |
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JDK7("7"), |
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/** 1.8 lambda expressions and default methods. */ |
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JDK8("8"), |
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/** 1.9 modularity. */ |
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JDK9("9"), |
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/** 1.10 local-variable type inference (var). */ |
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JDK10("10"), |
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/** 1.11 local-variable syntax for lambda parameters */ |
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JDK11("11"), |
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/** 12, no language features; switch expression were in preview */ |
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JDK12("12"), |
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/** |
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* 13, no language features; text blocks and revised switch |
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* expressions in preview |
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*/ |
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JDK13("13"), |
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/** |
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* 14 covers the to be determined language features that will be |
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* added in JDK 14. |
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*/ |
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JDK14("14"); |
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private static final Context.Key<Source> sourceKey = new Context.Key<>(); |
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public static Source instance(Context context) { |
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Source instance = context.get(sourceKey); |
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if (instance == null) { |
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Options options = Options.instance(context); |
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String sourceString = options.get(SOURCE); |
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if (sourceString != null) instance = lookup(sourceString); |
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if (instance == null) instance = DEFAULT; |
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context.put(sourceKey, instance); |
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} |
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return instance; |
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} |
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public final String name; |
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private static final Map<String,Source> tab = new HashMap<>(); |
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static { |
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for (Source s : values()) { |
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tab.put(s.name, s); |
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} |
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tab.put("1.5", JDK5); // Make 5 an alias for 1.5 |
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tab.put("1.6", JDK6); // Make 6 an alias for 1.6 |
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tab.put("1.7", JDK7); // Make 7 an alias for 1.7 |
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tab.put("1.8", JDK8); // Make 8 an alias for 1.8 |
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tab.put("1.9", JDK9); // Make 9 an alias for 1.9 |
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tab.put("1.10", JDK10); // Make 10 an alias for 1.10 |
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// Decline to make 1.11 an alias for 11. |
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} |
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private Source(String name) { |
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this.name = name; |
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} |
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public static final Source MIN = Source.JDK7; |
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private static final Source MAX = values()[values().length - 1]; |
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public static final Source DEFAULT = MAX; |
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public static Source lookup(String name) { |
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return tab.get(name); |
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} |
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public boolean isSupported() { |
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return this.compareTo(MIN) >= 0; |
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} |
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public Target requiredTarget() { |
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if (this.compareTo(JDK14) >= 0) return Target.JDK1_14; |
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if (this.compareTo(JDK13) >= 0) return Target.JDK1_13; |
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if (this.compareTo(JDK12) >= 0) return Target.JDK1_12; |
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if (this.compareTo(JDK11) >= 0) return Target.JDK1_11; |
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if (this.compareTo(JDK10) >= 0) return Target.JDK1_10; |
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if (this.compareTo(JDK9) >= 0) return Target.JDK1_9; |
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if (this.compareTo(JDK8) >= 0) return Target.JDK1_8; |
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if (this.compareTo(JDK7) >= 0) return Target.JDK1_7; |
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if (this.compareTo(JDK6) >= 0) return Target.JDK1_6; |
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if (this.compareTo(JDK5) >= 0) return Target.JDK1_5; |
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if (this.compareTo(JDK1_4) >= 0) return Target.JDK1_4; |
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return Target.JDK1_1; |
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} |
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/** |
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* Models a feature of the Java programming language. Each feature can be associated with a |
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* minimum source level, a maximum source level and a diagnostic fragment describing the feature, |
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* which is used to generate error messages of the kind {@code feature XYZ not supported in source N}. |
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*/ |
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public enum Feature { |
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DIAMOND(JDK7, Fragments.FeatureDiamond, DiagKind.NORMAL), |
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MODULES(JDK9, Fragments.FeatureModules, DiagKind.PLURAL), |
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EFFECTIVELY_FINAL_VARIABLES_IN_TRY_WITH_RESOURCES(JDK9, Fragments.FeatureVarInTryWithResources, DiagKind.PLURAL), |
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DEPRECATION_ON_IMPORT(MIN, JDK8), |
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POLY(JDK8), |
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LAMBDA(JDK8, Fragments.FeatureLambda, DiagKind.PLURAL), |
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METHOD_REFERENCES(JDK8, Fragments.FeatureMethodReferences, DiagKind.PLURAL), |
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DEFAULT_METHODS(JDK8, Fragments.FeatureDefaultMethods, DiagKind.PLURAL), |
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STATIC_INTERFACE_METHODS(JDK8, Fragments.FeatureStaticIntfMethods, DiagKind.PLURAL), |
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STATIC_INTERFACE_METHODS_INVOKE(JDK8, Fragments.FeatureStaticIntfMethodInvoke, DiagKind.PLURAL), |
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STRICT_METHOD_CLASH_CHECK(JDK8), |
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EFFECTIVELY_FINAL_IN_INNER_CLASSES(JDK8), |
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TYPE_ANNOTATIONS(JDK8, Fragments.FeatureTypeAnnotations, DiagKind.PLURAL), |
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ANNOTATIONS_AFTER_TYPE_PARAMS(JDK8, Fragments.FeatureAnnotationsAfterTypeParams, DiagKind.PLURAL), |
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REPEATED_ANNOTATIONS(JDK8, Fragments.FeatureRepeatableAnnotations, DiagKind.PLURAL), |
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INTERSECTION_TYPES_IN_CAST(JDK8, Fragments.FeatureIntersectionTypesInCast, DiagKind.PLURAL), |
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GRAPH_INFERENCE(JDK8), |
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FUNCTIONAL_INTERFACE_MOST_SPECIFIC(JDK8), |
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POST_APPLICABILITY_VARARGS_ACCESS_CHECK(JDK8), |
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MAP_CAPTURES_TO_BOUNDS(MIN, JDK7), |
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PRIVATE_SAFE_VARARGS(JDK9), |
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DIAMOND_WITH_ANONYMOUS_CLASS_CREATION(JDK9, Fragments.FeatureDiamondAndAnonClass, DiagKind.NORMAL), |
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UNDERSCORE_IDENTIFIER(MIN, JDK8), |
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PRIVATE_INTERFACE_METHODS(JDK9, Fragments.FeaturePrivateIntfMethods, DiagKind.PLURAL), |
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LOCAL_VARIABLE_TYPE_INFERENCE(JDK10), |
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VAR_SYNTAX_IMPLICIT_LAMBDAS(JDK11, Fragments.FeatureVarSyntaxInImplicitLambda, DiagKind.PLURAL), |
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IMPORT_ON_DEMAND_OBSERVABLE_PACKAGES(JDK1_2, JDK8), |
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SWITCH_MULTIPLE_CASE_LABELS(JDK14, Fragments.FeatureMultipleCaseLabels, DiagKind.PLURAL), |
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SWITCH_RULE(JDK14, Fragments.FeatureSwitchRules, DiagKind.PLURAL), |
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SWITCH_EXPRESSION(JDK14, Fragments.FeatureSwitchExpressions, DiagKind.PLURAL), |
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TEXT_BLOCKS(JDK14, Fragments.FeatureTextBlocks, DiagKind.PLURAL); |
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enum DiagKind { |
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NORMAL, |
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PLURAL; |
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} |
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private final Source minLevel; |
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private final Source maxLevel; |
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private final Fragment optFragment; |
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private final DiagKind optKind; |
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Feature(Source minLevel) { |
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this(minLevel, null, null); |
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} |
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Feature(Source minLevel, Fragment optFragment, DiagKind optKind) { |
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this(minLevel, MAX, optFragment, optKind); |
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} |
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Feature(Source minLevel, Source maxLevel) { |
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this(minLevel, maxLevel, null, null); |
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} |
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|
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Feature(Source minLevel, Source maxLevel, Fragment optFragment, DiagKind optKind) { |
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this.minLevel = minLevel; |
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this.maxLevel = maxLevel; |
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this.optFragment = optFragment; |
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this.optKind = optKind; |
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} |
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public boolean allowedInSource(Source source) { |
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return source.compareTo(minLevel) >= 0 && |
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source.compareTo(maxLevel) <= 0; |
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} |
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public boolean isPlural() { |
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Assert.checkNonNull(optKind); |
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return optKind == DiagKind.PLURAL; |
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} |
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public Fragment nameFragment() { |
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Assert.checkNonNull(optFragment); |
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return optFragment; |
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} |
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public Fragment fragment(String sourceName) { |
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Assert.checkNonNull(optFragment); |
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return optKind == DiagKind.NORMAL ? |
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Fragments.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : |
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Fragments.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); |
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} |
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public Error error(String sourceName) { |
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Assert.checkNonNull(optFragment); |
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return optKind == DiagKind.NORMAL ? |
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Errors.FeatureNotSupportedInSource(optFragment, sourceName, minLevel.name) : |
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Errors.FeatureNotSupportedInSourcePlural(optFragment, sourceName, minLevel.name); |
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} |
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} |
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|
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public static SourceVersion toSourceVersion(Source source) { |
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switch(source) { |
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case JDK1_2: |
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return RELEASE_2; |
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case JDK1_3: |
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return RELEASE_3; |
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case JDK1_4: |
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return RELEASE_4; |
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case JDK5: |
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return RELEASE_5; |
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case JDK6: |
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return RELEASE_6; |
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case JDK7: |
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return RELEASE_7; |
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case JDK8: |
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return RELEASE_8; |
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case JDK9: |
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return RELEASE_9; |
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case JDK10: |
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return RELEASE_10; |
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case JDK11: |
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return RELEASE_11; |
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case JDK12: |
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return RELEASE_12; |
|
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case JDK13: |
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return RELEASE_13; |
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case JDK14: |
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return RELEASE_14; |
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10 | 291 |
default: |
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return null; |
|
293 |
} |
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294 |
} |
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} |