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package org.checkerframework.framework.qual;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* Specifies kinds of literal trees.
*
* These correspond to the *_LITERAL constants in {@link com.sun.source.tree.Tree.Kind}. However,
* that enum is in the tools.jar which is not on the user's classpath by default. This enum is used
* by meta-annotations, such as {@link QualifierForLiterals}, instead.
*/
// https://docs.oracle.com/javase/8/docs/technotes/tools/findingclasses.html#bootclass
public enum LiteralKind {
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#NULL_LITERAL} trees. */
NULL,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#INT_LITERAL} trees. */
INT,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#LONG_LITERAL} trees. */
LONG,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#FLOAT_LITERAL} trees. */
FLOAT,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#DOUBLE_LITERAL} trees. */
DOUBLE,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#BOOLEAN_LITERAL} trees. */
BOOLEAN,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#CHAR_LITERAL} trees. */
CHAR,
/** Corresponds to {@link com.sun.source.tree.Tree.Kind#STRING_LITERAL} trees. */
STRING,
/** Shorthand for all other LiteralKind constants, other than PRIMITIVE. */
ALL,
/** Shorthand for all primitive LiteralKind constants: INT, LONG, FLOAT, DOUBLE, BOOLEAN, CHAR. */
PRIMITIVE;
/**
* Returns all LiteralKinds except for ALL and PRIMITIVE (which are shorthands for groups of other
* LiteralKinds).
*
* @return list of LiteralKinds except for ALL and PRIMITIVE
*/
public static List allLiteralKinds() {
List list = new ArrayList<>(Arrays.asList(values()));
list.remove(ALL);
list.remove(PRIMITIVE);
return list;
}
/**
* Returns the primitive {@code LiteralKind}s: INT, LONG, FLOAT, DOUBLE, BOOLEAN, CHAR. This is
* all LiteralKinds except for NULL, STRING, and ones that are shorthands for groups of other
* LiteralKinds.
*
* @return list of LiteralKinds except for NULL and STRING
*/
public static List primitiveLiteralKinds() {
return Arrays.asList(INT, LONG, FLOAT, DOUBLE, BOOLEAN, CHAR);
}
}