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Closure Compiler is a JavaScript optimizing compiler. It parses your
JavaScript, analyzes it, removes dead code and rewrites and minimizes
what's left. It also checks syntax, variable references, and types, and
warns about common JavaScript pitfalls. It is used in many of Google's
JavaScript apps, including Gmail, Google Web Search, Google Maps, and
Google Docs.
/*
* Copyright 2020 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.javascript.jscomp.colors;
import com.google.common.collect.ImmutableCollection;
/** Value types that are a) not user-defined and b) do not need individual classes */
public enum PrimitiveColor implements Color {
// JS primitive types
NUMBER,
STRING,
SYMBOL,
NULL_OR_VOID,
BIGINT,
BOOLEAN,
// Equivalent to Closure '*'/'?' and TS unknown/any
UNKNOWN;
@Override
public boolean isPrimitive() {
return true;
}
@Override
public boolean isUnion() {
return false;
}
@Override
public boolean isObject() {
return false;
}
@Override
public ImmutableCollection getAlternates() {
// In theory we could consider a primitive a union of a single value. It's not clear whether
// that would be simpler or not.
throw new UnsupportedOperationException("Can only call getAlternates() on unions");
}
@Override
public boolean isInvalidating() {
return true;
}
}