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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.

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/*
 * Copyright 2016 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;

/**
 * Static error constants related to the {@link PolymerPass}.
 */
final class PolymerPassErrors {
  // TODO(jlklein): Switch back to an error when everyone is upgraded to Polymer 1.0
  static final DiagnosticType POLYMER_DESCRIPTOR_NOT_VALID = DiagnosticType.warning(
      "JSC_POLYMER_DESCRIPTOR_NOT_VALID",
      "The argument to Polymer() is not an obj lit (perhaps because this is a pre-Polymer-1.0 "
      + "call). Ignoring this call.");

  // Disallow 'const Foo = Polymer(...)' because the code the PolymerPass outputs will reassign
  // Foo which is not allowed for 'const' variables.
  static final DiagnosticType POLYMER_INVALID_DECLARATION = DiagnosticType.error(
      "JSC_POLYMER_INVALID_DECLARATION", "A Polymer() declaration cannot use 'const'.");

  static final DiagnosticType POLYMER_MISSING_IS = DiagnosticType.error("JSC_POLYMER_MISSING_IS",
      "The class descriptor must include an 'is' property.");

  static final DiagnosticType POLYMER_UNEXPECTED_PARAMS = DiagnosticType.error(
      "JSC_POLYMER_UNEXPECTED_PARAMS", "The class definition has too many arguments.");

  static final DiagnosticType POLYMER_MISSING_EXTERNS = DiagnosticType.error(
      "JSC_POLYMER_MISSING_EXTERNS", "Missing Polymer externs.");

  static final DiagnosticType POLYMER_INVALID_PROPERTY = DiagnosticType.error(
      "JSC_POLYMER_INVALID_PROPERTY", "Polymer property has an invalid or missing type.");

  static final DiagnosticType POLYMER_INVALID_EXTENDS = DiagnosticType.error(
      "JSC_POLYMER_INVALID_EXTENDS",
      "Cannot extend HTML element ''{0}''. The element is probably either misspelled,"
          + " or needs to be added to the list of known elements.");

  static final DiagnosticType POLYMER_INVALID_BEHAVIOR_ARRAY = DiagnosticType.error(
      "JSC_POLYMER_INVALID_BEHAVIOR_ARRAY", "The behaviors property must be an array literal.");

  static final DiagnosticType POLYMER_UNQUALIFIED_BEHAVIOR = DiagnosticType.error(
      "JSC_POLYMER_UNQUALIFIED_BEHAVIOR",
      "Behaviors must be global names or qualified names that are declared as object literals or "
      + "array literals of other valid Behaviors.");

  static final DiagnosticType POLYMER_UNANNOTATED_BEHAVIOR = DiagnosticType.error(
      "JSC_POLYMER_UNANNOTATED_BEHAVIOR",
      "Behavior declarations must be annotated with @polymerBehavior.");

  static final DiagnosticType POLYMER_SHORTHAND_NOT_SUPPORTED =
      DiagnosticType.error(
          "JSC_POLYMER_SHORTHAND_NOT_SUPPORTED",
          "Shorthand assignment in object literal is not allowed in Polymer call arguments");

  private PolymerPassErrors() {}
}