com.google.javascript.jscomp.serialization.TypePointers Maven / Gradle / Ivy
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/*
* Copyright 2021 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.serialization;
import static com.google.common.base.Preconditions.checkState;
import com.google.common.collect.ImmutableList;
import com.google.javascript.jscomp.colors.Color;
import com.google.javascript.jscomp.colors.StandardColors;
/** TypePointer utilities. */
final class TypePointers {
/**
* The first N TypePointer pool offsets correspond to axiomatic colors in this order.
*
* These colors are never serialized because all their information is constant.
*/
static final ImmutableList OFFSET_TO_AXIOMATIC_COLOR =
ImmutableList.of(
StandardColors.UNKNOWN,
StandardColors.BOOLEAN,
StandardColors.STRING,
StandardColors.NUMBER,
StandardColors.NULL_OR_VOID,
StandardColors.SYMBOL,
StandardColors.BIGINT,
StandardColors.TOP_OBJECT);
static final int AXIOMATIC_COLOR_COUNT = OFFSET_TO_AXIOMATIC_COLOR.size();
static int trimOffset(int x) {
checkState(x >= AXIOMATIC_COLOR_COUNT, x);
return x - AXIOMATIC_COLOR_COUNT;
}
static int untrimOffset(int x) {
checkState(x >= 0, x);
return x + AXIOMATIC_COLOR_COUNT;
}
static boolean isAxiomatic(int x) {
return x < AXIOMATIC_COLOR_COUNT;
}
private TypePointers() {
throw new AssertionError();
}
}