IDEA-87673 (temp. suppress errors in/around lambda expressions)

2026-09-18 09:34:34 +07:00 · 2012-07-06 16:50:45 +02:00
parent 3bf5c2d15d
commit ee20b95762
2 changed files with 1366 additions and 1307 deletions
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2000-2012 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.intellij.codeInsight.daemon.impl.analysis;
+
+import com.intellij.codeInsight.daemon.impl.HighlightInfo;
+import com.intellij.codeInsight.daemon.impl.HighlightInfoFilter;
+import com.intellij.lang.annotation.HighlightSeverity;
+import com.intellij.psi.*;
+import com.intellij.psi.util.PsiTreeUtil;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * A filter to temporarily suppress highlighting errors inside lambda expressions.
+ * todo[r.sh] stub; remove after implementing type inference
+ */
+public class JavaHighlightInfoFilter implements HighlightInfoFilter {
+  @Override
+  public boolean accept(@NotNull final HighlightInfo info, @Nullable final PsiFile file) {
+    if (!(file instanceof PsiJavaFile)) return true;
+    if (info.getSeverity() != HighlightSeverity.ERROR) return true;
+    if (description(info, "Lambda expressions are not supported at this language level")) return true;
+
+    final PsiElement element = file.findElementAt(info.getStartOffset());
+    if (element == null) return true;
+
+    return !isInsideLambda(element) &&
+           !isLambdaInAmbiguousCall(info, element);
+  }
+
+  private static boolean isInsideLambda(final PsiElement element) {
+    return PsiTreeUtil.getParentOfType(element, PsiLambdaExpression.class, false) != null;
+  }
+
+  private static boolean isLambdaInAmbiguousCall(final HighlightInfo info, final PsiElement element) {
+    if (!description(info, "Ambiguous method call")) return false;
+    final PsiElement exprList = element.getParent();
+    if (!(exprList instanceof PsiExpressionList)) return false;
+    return PsiTreeUtil.getChildOfType(exprList, PsiLambdaExpression.class) != null;
+  }
+
+  private static boolean description(final HighlightInfo info, final String prefix) {
+    return info.description != null && info.description.startsWith(prefix);
+  }
+}