[PATCH] D151383: [clang-tidy] Check for specific return types on all functions

[NagaChaitanya Vellanki via Phabricator via cfe-commits]

chaitanyav updated this revision to Diff 525359.
chaitanyav added a comment.

Reuse diag code


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151383/new/

https://reviews.llvm.org/D151383

Files:
  clang-tools-extra/clang-tidy/bugprone/UnusedReturnValueCheck.cpp


Index: clang-tools-extra/clang-tidy/bugprone/UnusedReturnValueCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/bugprone/UnusedReturnValueCheck.cpp
+++ clang-tools-extra/clang-tidy/bugprone/UnusedReturnValueCheck.cpp
@@ -156,6 +156,15 @@
   auto UnusedInRangeForStmt = cxxForRangeStmt(hasBody(MatchedCallExpr));
   auto UnusedInCaseStmt = switchCase(forEach(MatchedCallExpr));
 
+  Finder->addMatcher(
+      callExpr(callee(functionDecl(anyOf(
+                   hasReturnTypeLoc(loc(asString("std::error_code"))),
+                   hasReturnTypeLoc(loc(asString("std::expected"))),
+                   hasReturnTypeLoc(loc(asString("boost::system::error_code"))),
+                   hasReturnTypeLoc(loc(asString("abseil::Status")))))))
+          .bind("return-types"),
+      this);
+
   Finder->addMatcher(
       stmt(anyOf(UnusedInCompoundStmt, UnusedInIfStmt, UnusedInWhileStmt,
                  UnusedInDoStmt, UnusedInForStmt, UnusedInRangeForStmt,
@@ -164,13 +173,17 @@
 }
 
 void UnusedReturnValueCheck::check(const MatchFinder::MatchResult &Result) {
-  if (const auto *Matched = Result.Nodes.getNodeAs<CallExpr>("match")) {
-    diag(Matched->getBeginLoc(),
-         "the value returned by this function should be used")
-        << Matched->getSourceRange();
-    diag(Matched->getBeginLoc(),
-         "cast the expression to void to silence this warning",
-         DiagnosticIDs::Note);
+  const char *callExprBindingNames[] = {"return-types", "match"};
+  for (const char *callExprBindingName : callExprBindingNames) {
+    if (const auto *Matched =
+            Result.Nodes.getNodeAs<CallExpr>(callExprBindingName)) {
+      diag(Matched->getBeginLoc(),
+           "the value returned by this function should be used")
+          << Matched->getSourceRange();
+      diag(Matched->getBeginLoc(),
+           "cast the expression to void to silence this warning",
+           DiagnosticIDs::Note);
+    };
   }
 }
 


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