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Wrapped signature elements into psi element signature_element
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66 changes: 66 additions & 0 deletions
66
plugin/core/src/com/perl5/lang/perl/psi/PerlSignatureElement.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| /* | ||
| * Copyright 2015-2020 Alexandr Evstigneev | ||
| * | ||
| * 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.perl5.lang.perl.psi; | ||
|
|
||
| import com.intellij.psi.PsiElement; | ||
| import org.jetbrains.annotations.NotNull; | ||
| import org.jetbrains.annotations.Nullable; | ||
|
|
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| public interface PerlSignatureElement extends PerlLexicalVariableDeclarationMarker { | ||
| @Nullable | ||
| default PsiElement getTypeConstraintElement() { | ||
| PsiElement[] children = getChildren(); | ||
| if (children.length == 3) { | ||
| return children[0]; | ||
| } | ||
| if (children.length < 2) { | ||
| return null; | ||
| } | ||
| return isDeclarationElement(children[1]) ? children[0] : null; | ||
| } | ||
|
|
||
| @Nullable | ||
| default PsiElement getDeclarationElement() { | ||
| PsiElement[] children = getChildren(); | ||
| if (children.length == 3) { | ||
| return children[1]; | ||
| } | ||
| if (children.length == 1) { | ||
| return children[0]; | ||
| } | ||
| return isDeclarationElement(children[0]) ? children[0] : children[1]; | ||
| } | ||
|
|
||
| /** | ||
| * @return true iff {@code psiElement} is variable declaration or ignore element | ||
| */ | ||
| static boolean isDeclarationElement(@NotNull PsiElement psiElement) { | ||
| return psiElement instanceof PerlVariableDeclaration || psiElement instanceof PsiPerlSubSignatureElementIgnore; | ||
| } | ||
|
|
||
| @Nullable | ||
| default PsiElement getDefaultValueElement() { | ||
| PsiElement[] children = getChildren(); | ||
| if (children.length == 3) { | ||
| return children[2]; | ||
| } | ||
| if (children.length < 2) { | ||
| return null; | ||
| } | ||
| return isDeclarationElement(children[1]) ? null : children[1]; | ||
| } | ||
| } |
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