-
Notifications
You must be signed in to change notification settings - Fork 15.5k
[libc++] Applied [[nodiscard]] to <exception>, <stdexcept> and <system_error>
#170837
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Merged
Zingam
merged 4 commits into
llvm:main
from
H-G-Hristov:hgh/libcxx/nodiscard-to-exception
Dec 6, 2025
Merged
Changes from all commits
Commits
File filter
Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
108 changes: 108 additions & 0 deletions
108
libcxx/test/libcxx/diagnostics/syserr/nodiscard.verify.cpp
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| //===----------------------------------------------------------------------===// | ||
| // | ||
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||
| // See https://llvm.org/LICENSE.txt for license information. | ||
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||
| // | ||
| //===----------------------------------------------------------------------===// | ||
|
|
||
| // Check that functions are marked [[nodiscard]] | ||
|
|
||
| #include <stdexcept> | ||
| #include <system_error> | ||
|
|
||
| void test() { | ||
| { // <stdexcept> | ||
| std::logic_error le("logic error"); | ||
| le.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::runtime_error re("runtime error"); | ||
| re.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::domain_error de("domain error"); | ||
| de.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::invalid_argument ia("invalid argument"); | ||
| ia.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::length_error lerr("length error"); | ||
| lerr.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::out_of_range oor("out of range"); | ||
| oor.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::range_error rerr("range error"); | ||
| rerr.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::overflow_error oferr("overflow error"); | ||
| oferr.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
|
|
||
| std::underflow_error uferr("underflow error"); | ||
| uferr.what(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| } | ||
| { // <system_error> | ||
| { | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| std::generic_category(); | ||
|
|
||
| const std::error_category& ec = std::generic_category(); | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.name(); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.default_error_condition(94); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.equivalent(94, ec.default_error_condition(82)); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.equivalent(std::error_code(49, ec), 94); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.message(82); | ||
| } | ||
| { | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| std::system_category(); | ||
|
|
||
| const std::error_category& ec = std::system_category(); | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.name(); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.default_error_condition(94); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.equivalent(94, ec.default_error_condition(82)); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.equivalent(std::error_code(49, ec), 94); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.message(82); | ||
| } | ||
| { | ||
| std::error_code ec; | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.value(); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.category(); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.default_error_condition(); | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.message(); | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| std::make_error_code(std::errc::invalid_argument); | ||
| } | ||
| { | ||
| std::error_condition ec; | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.value(); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.category(); | ||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| ec.message(); | ||
|
|
||
| // expected-warning@+1 {{ignoring return value of function declared with 'nodiscard' attribute}} | ||
| std::make_error_condition(std::errc::invalid_argument); | ||
| } | ||
| } | ||
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Uh oh!
There was an error while loading. Please reload this page.