Basic: Use llvm streams instead of iostream in Assertions.cpp

Author: slavapestov

lib/Basic/Assertions.cpp

@@ -1,20 +1,21 @@
-//===--- Assertions.cpp - Swift Version Number -------------------------------===//
+//===--- Assertions.cpp - Assertion macros --------------------------------===//
 //
 // This source file is part of the Swift.org open source project
 //
-// Copyright (c) 2023 - 2023 Apple Inc. and the Swift project authors
+// Copyright (c) 2024 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 //===----------------------------------------------------------------------===//
 //
-// This file defines custom assertion support functions
+// This file defines implementation details of include/swift/Basic/Assertions.h.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
 #include "swift/Basic/Assertions.h"
 #undef NDEBUG
 #include <cassert>
@@ -39,21 +40,20 @@ void ASSERT_failure(const char *expr, const char *filename, int line, const char
   if (AssertHelp) {
     ASSERT_help();
   } else {
-    std::cerr << "Assertion help:  -Xllvm -assert-help" << std::endl;
+    llvm::errs() << "Assertion help:  -Xllvm -assert-help\n";
   }
 
 
   // Format here matches that used by `assert` on macOS:
-  std::cerr
+  llvm::errs()
     << "Assertion failed: "
     << "(" << expr << "), "
     << "function " << func << " at "
     << filename << ":"
-    << line << "."
-    << std::endl;
+    << line << ".\n";
 
   if (AssertContinue) {
-    std::cerr << "Continuing after failed assertion (-Xllvm -assert-continue)" << std::endl;
+    llvm::errs() << "Continuing after failed assertion (-Xllvm -assert-continue)\n";
     return;
   }
 
@@ -67,12 +67,10 @@ void ASSERT_help() {
   }
   ASSERT_help_shown = 1;
 
-  std::cerr << std::endl;
-  std::cerr << "Control assertion behavior with one or more of the following options:" << std::endl;
-  std::cerr << std::endl;
-  std::cerr << " -Xllvm -assert-continue" << std::endl;
-  std::cerr << "     Continue after any failed assertion" << std::endl;
-  std::cerr << std::endl;
+  llvm::errs() << "\n";
+  llvm::errs() << "Control assertion behavior with one or more of the following options:\n\n";
+  llvm::errs() << " -Xllvm -assert-continue\n";
+  llvm::errs() << "     Continue after any failed assertion\n\n";
 }
 
 // This has to be callable in the same way as the macro version,
@@ -81,4 +79,3 @@ void ASSERT_help() {
 int CONDITIONAL_ASSERT_enabled() {
   return (CONDITIONAL_ASSERT_Global_enable_flag != 0);
 }
-