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JDK14/Java14源码在线阅读 / jdk.jshell / share / classes / jdk / jshell / ExpressionSnippet.java
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * accompanied this code).
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package jdk.jshell;

import jdk.jshell.Key.ExpressionKey;

/**
 * Snippet for an assignment or variable-value expression.
 * The Kind is {@link jdk.jshell.Snippet.Kind#EXPRESSION}.
 * <p>
 * <code>ExpressionSnippet</code> is immutable: an access to
 * any of its methods will always return the same result.
 * and thus is thread-safe.
 *
 * @since 9
 * @jls 15 Expressions
 */
public class ExpressionSnippet extends Snippet {

    ExpressionSnippet(ExpressionKey key, String userSource, Wrap guts, String name, SubKind subkind) {
        super(key, userSource, guts, name, subkind, null);
    }

    /**
     * Variable name which is the value of the expression. Since the expression
     * is either just a variable identifier or it is an assignment
     * to a variable, there is always a variable which is the subject of the
     * expression. All other forms of expression become temporary variables
     * which are instead referenced by a {@link VarSnippet}.
     * @return the name of the variable which is the subject of the expression.
     */
    @Override
    public String name() {
        return key().name();
    }

    /**
     * Type of the expression

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