https://github.com/aadanen updated
https://github.com/llvm/llvm-project/pull/149396
>From f3fbebdd6d940d36561ccf5177510095ba05077e Mon Sep 17 00:00:00 2001
From: Aaron Danen <aaron.da...@gmail.com>
Date: Wed, 16 Jul 2025 19:44:58 -0700
Subject: [PATCH 1/2] clarified %undo error msg in clang-repl
used grep -r "Too many undos" to locate all instances where the string
was mentioned. Changed the string to the suggestion in issue 143668
---
clang/lib/Interpreter/Interpreter.cpp | 2 +-
clang/unittests/Interpreter/InterpreterTest.cpp | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/clang/lib/Interpreter/Interpreter.cpp
b/clang/lib/Interpreter/Interpreter.cpp
index ed3bae59a144c..a2696f78cb510 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -754,7 +754,7 @@ llvm::Error Interpreter::Undo(unsigned N) {
if (N > getEffectivePTUSize())
return llvm::make_error<llvm::StringError>("Operation failed. "
- "Too many undos",
+ "No input left to undo",
std::error_code());
for (unsigned I = 0; I < N; I++) {
if (IncrExecutor) {
diff --git a/clang/unittests/Interpreter/InterpreterTest.cpp
b/clang/unittests/Interpreter/InterpreterTest.cpp
index b97f5ae17c9f0..2ec65e2a9b2ef 100644
--- a/clang/unittests/Interpreter/InterpreterTest.cpp
+++ b/clang/unittests/Interpreter/InterpreterTest.cpp
@@ -158,12 +158,12 @@ TEST_F(InterpreterTest, UndoCommand) {
// Fail to undo.
auto Err1 = Interp->Undo();
- EXPECT_EQ("Operation failed. Too many undos",
+ EXPECT_EQ("Operation failed. No input left to undo",
llvm::toString(std::move(Err1)));
auto Err2 = Interp->Parse("int foo = 42;");
EXPECT_TRUE(!!Err2);
auto Err3 = Interp->Undo(2);
- EXPECT_EQ("Operation failed. Too many undos",
+ EXPECT_EQ("Operation failed. No input left to undo",
llvm::toString(std::move(Err3)));
// Succeed to undo.
>From b0513a8a46e69b3d9753d6ada1ca8f71debc9fe3 Mon Sep 17 00:00:00 2001
From: Aaron Danen <aaron.da...@gmail.com>
Date: Fri, 18 Jul 2025 18:18:27 -0700
Subject: [PATCH 2/2] implemented contextual error msg
differentiate between the case of 0 inputs to undo and the case when
there are X inputs and Y requested undos but Y > X
---
clang/lib/Interpreter/Interpreter.cpp | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/clang/lib/Interpreter/Interpreter.cpp
b/clang/lib/Interpreter/Interpreter.cpp
index a2696f78cb510..5b4b73fd6490c 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -752,10 +752,17 @@
Interpreter::getSymbolAddressFromLinkerName(llvm::StringRef Name) const {
llvm::Error Interpreter::Undo(unsigned N) {
- if (N > getEffectivePTUSize())
+ if (getEffectivePTUSize() == 0) {
return llvm::make_error<llvm::StringError>("Operation failed. "
"No input left to undo",
std::error_code());
+ } else if (N > getEffectivePTUSize()) {
+ return llvm::make_error<llvm::StringError>(
+ llvm::formatv("Wanted to undo {0} inputs, only have {1}.",
+ N, getEffectivePTUSize()),
+ std::error_code());
+ }
+
for (unsigned I = 0; I < N; I++) {
if (IncrExecutor) {
if (llvm::Error Err = IncrExecutor->removeModule(PTUs.back()))
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