[Support] Add const to FileError::getFileName

bnbarham · bnbarham · commit 3466b8e23d9c · 2022-03-14T11:45:29.000-07:00
`getFileName` returns a `StringRef`, there's no reason it shouldn't be const. Differential Revision: https://reviews.llvm.org/D121495
diff --git a/llvm/include/llvm/Support/Error.h b/llvm/include/llvm/Support/Error.h
@@ -1281,7 +1281,7 @@ class FileError final : public ErrorInfo<FileError> {
     return OS.str();
   }
 
-  StringRef getFileName() { return FileName; }
+  StringRef getFileName() const { return FileName; }
 
   Error takeError() { return Error(std::move(Err)); }
 

Original file line number	Diff line number	Diff line change
`@@ -1281,7 +1281,7 @@ class FileError final : public ErrorInfo<FileError> {`
`1281`	`1281`	`return OS.str();`
`1282`	`1282`	`}`
`1283`	`1283`
`1284`		`- StringRef getFileName() { return FileName; }`
	`1284`	`+ StringRef getFileName() const { return FileName; }`
`1285`	`1285`
`1286`	`1286`	`Error takeError() { return Error(std::move(Err)); }`
`1287`	`1287`