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Rework parser to better match the spec for UnaryExpression and Update…
…Expression.
Relevant productions are:
UnaryExpression :=
UpdateExpression
{ delete | void | typeof | + | - | ~ | ! } UnaryExpression
UpdateExpression :=
{ ++ | -- } UnaryExpression
LeftHandSideExpression [no LineTerminator here] { ++ | -- }
This is preparatory work for adding ExponentiationExpression (** operator).
-------------
Created by MOE: https://github.com/google/moe
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34 changes: 0 additions & 34 deletions
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src/com/google/javascript/jscomp/parsing/parser/trees/PostfixExpressionTree.java
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63 changes: 63 additions & 0 deletions
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src/com/google/javascript/jscomp/parsing/parser/trees/UpdateExpressionTree.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| /* | ||
| * 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.parsing.parser.trees; | ||
|
|
||
| import com.google.javascript.jscomp.parsing.parser.Token; | ||
| import com.google.javascript.jscomp.parsing.parser.util.SourceRange; | ||
|
|
||
| /** | ||
| * Represents UpdateExpression productions from the spec. | ||
| * | ||
| * <pre><code> | ||
| * UpdateExpression := | ||
| * { ++ | -- } UnaryExpression | ||
| * LeftHandSideExpression [no LineTerminator here] { ++ | -- } | ||
| * </code></pre> | ||
| */ | ||
| public class UpdateExpressionTree extends ParseTree { | ||
|
|
||
| /** | ||
| * Position of the operator relative to the operand. | ||
| */ | ||
| public enum OperatorPosition { | ||
| PREFIX, | ||
| POSTFIX; | ||
| } | ||
|
|
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| public final Token operator; | ||
| public final OperatorPosition operatorPosition; | ||
| public final ParseTree operand; | ||
|
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| public UpdateExpressionTree( | ||
| SourceRange location, Token operator, OperatorPosition operatorPosition, ParseTree operand) { | ||
| super(ParseTreeType.UPDATE_EXPRESSION, location); | ||
|
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| this.operator = operator; | ||
| this.operatorPosition = operatorPosition; | ||
| this.operand = operand; | ||
| } | ||
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| public static UpdateExpressionTree prefix( | ||
| SourceRange location, Token operator, ParseTree operand) { | ||
| return new UpdateExpressionTree(location, operator, OperatorPosition.PREFIX, operand); | ||
| } | ||
|
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| public static UpdateExpressionTree postfix( | ||
| SourceRange location, Token operator, ParseTree operand) { | ||
| return new UpdateExpressionTree(location, operator, OperatorPosition.POSTFIX, operand); | ||
| } | ||
| } |