| // Copyright (C) 2016 The Android Open Source Project |
| // |
| // 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 ast |
| |
| // Invalid is used when an error was encountered in the parsing, but we want to |
| // keep going. If there are no errors, this will never be in the tree. |
| type Invalid struct { |
| ignore bool // filed added so the instances get a unique address |
| } |
| |
| func (Invalid) isNode() {} |
| |
| // InvalidGeneric is a placeholder for an expected, but invalid generic. |
| // They are only generated by the parser when the source has a syntatic error. |
| var InvalidGeneric = &Generic{InvalidIdentifier, nil} |
| |
| // InvalidIdentifier is a placeholder for an expected, but invalid identifier. |
| // They are only generated by the parser when the source has a syntatic error. |
| var InvalidIdentifier = &Identifier{"<invalid>"} |
| |
| // InvalidNumber is a placeholder for an expected, but invalid number. |
| // They are only generated by the parser when the source has a syntatic error. |
| var InvalidNumber = &Number{"<invalid>"} |
| |
| // InvalidString is a placeholder for an expected, but invalid string. |
| // They are only generated by the parser when the source has a syntatic error. |
| var InvalidString = &String{"<invalid>"} |