| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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.jetbrains.python.validation; |
| |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.jetbrains.python.codeInsight.controlflow.ScopeOwner; |
| import com.jetbrains.python.codeInsight.dataflow.scope.ScopeUtil; |
| import com.jetbrains.python.psi.*; |
| |
| /** |
| * Highlights incorrect return statements: 'return' and 'yield' outside functions, returning values from generators. |
| */ |
| public class ReturnAnnotator extends PyAnnotator { |
| public void visitPyReturnStatement(final PyReturnStatement node) { |
| PyFunction function = PsiTreeUtil.getParentOfType(node, PyFunction.class, false, PyClass.class); |
| if (function == null) { |
| getHolder().createErrorAnnotation(node, "'return' outside of function"); |
| } |
| } |
| |
| public void visitPyYieldExpression(final PyYieldExpression node) { |
| final ScopeOwner owner = ScopeUtil.getScopeOwner(node); |
| if (!(owner instanceof PyFunction || owner instanceof PyLambdaExpression)) { |
| getHolder().createErrorAnnotation(node, "'yield' outside of function"); |
| } |
| } |
| } |