isocpp/CppCoreGuidelines

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The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++

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Forks: 5.6k
Open beginner issues: 0
Indexed issues: 238

Dominant language: CSS
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Last GitHub push: Aug 6, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
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238 open issues indexed

ES.63 not justifiable as stated and clashes with P.1 and P.3 Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

isocpp/CppCoreGuidelines#2336 · 4 comments · Opened Sep 12, 2026
C.21 appears to mandate the Rule of Five -- is that desirable? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2335 · 2 comments · Opened Aug 26, 2026
C.48: Prefer default member initializers, also for non-constant initializers Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2332 · 2 comments · Opened Aug 7, 2026
Provide a simple GSL utility to replace `static_cast<void>` Open

isocpp/CppCoreGuidelines#2319 · 7 comments · 1 assignee · Opened Mar 5, 2026
Update guidelines for existence of C++20 modules Open

isocpp/CppCoreGuidelines#2295 · 1 comment · 1 assignee · Opened Oct 22, 2025
ES.107 (and others) never mentions `std::ssize()` Open

isocpp/CppCoreGuidelines#2294 · 4 comments · 2 assignees · Opened Oct 17, 2025
[Update Needed, No Longer Always True Since C++23] F.19: For “forward” parameters, pass by TP&& and only std::forward the parameter Open

isocpp/CppCoreGuidelines#2277 · 1 assignee · Opened Jun 7, 2025
Should ES.23 mention that ()-initialization is likely to be preferrable when dealing with containers containing types initializable from the container itself Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

isocpp/CppCoreGuidelines#2205 · 8 comments · Opened Jun 12, 2024
C++ Core Guidelines Markdown explicit anchor links not working (updated the 20/05/2024) Open

isocpp/CppCoreGuidelines#2198 · 3 comments · 1 assignee · Opened May 10, 2024
Should/can Expects and Ensures be macros? Open

isocpp/CppCoreGuidelines#2182 · 2 comments · 1 assignee · Opened Feb 21, 2024
SF.2 allow inline variables and static inline class member variables Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

isocpp/CppCoreGuidelines#2169 · 1 comment · Opened Jan 16, 2024
C.21 Exception for copy-and-swap idiom Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

isocpp/CppCoreGuidelines#2164 · 5 comments · Opened Dec 22, 2023
Remove enforcement rules of rule F.17 Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

isocpp/CppCoreGuidelines#2162 · 7 comments · Opened Dec 17, 2023
Wrong links in P.8 Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2159 · 1 comment · Opened Nov 23, 2023
Ranges require exception to F.19 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2157 · 7 comments · 3 reactions · Opened Nov 2, 2023
ES.25 -- Is it truly beneficial to always employ const for objects? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2155 · 2 comments · 1 reaction · Opened Oct 24, 2023
ES.30: Don’t use macros for program text manipulation - example warnings Open

Difficulty 1/5 Under an hour Newbie friendliness 48/100

isocpp/CppCoreGuidelines#2152 · 3 comments · Opened Oct 18, 2023
File extensions for modules? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

isocpp/CppCoreGuidelines#2147 · 4 comments · 2 reactions · Opened Oct 2, 2023
[Proposal] Allow pointer parameters to coroutines (CP.coro section) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2142 · Opened Sep 26, 2023
E.16 not noexcept copy constructor Open

Difficulty 1/5 Under an hour Newbie friendliness 38/100

isocpp/CppCoreGuidelines#2135 · 1 comment · Opened Sep 11, 2023
I.2: Avoid non-const global variables Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2134 · 2 comments · Opened Sep 6, 2023
R.3: raw pointer Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2133 · 3 comments · Opened Sep 5, 2023
gsl not_null throw exception Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2132 · 1 comment · Opened Sep 5, 2023
F.45 needs another exception for rvalue overloads Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

isocpp/CppCoreGuidelines#2124 · 3 reactions · Opened Aug 16, 2023
Mismatch between the synopsis and enforcement of rule Enum.2 Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

isocpp/CppCoreGuidelines#2123 · 5 comments · Opened Aug 15, 2023
I.22 Various issues Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2121 · Opened Aug 13, 2023
Adjust the synopsis of rule Enum.1 Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

isocpp/CppCoreGuidelines#2119 · 3 comments · Opened Aug 12, 2023
Guideline against unconventional overloads Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2118 · 2 comments · 1 reaction · Opened Aug 11, 2023
Guideline for how to declare variables in a range-based for loop Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2115 · 5 comments · Opened Aug 3, 2023
Parameter pass-by-value heuristic: trivial copyability issue, and incomplete type issue Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

isocpp/CppCoreGuidelines#2112 · 5 comments · 4 reactions · Opened Jul 26, 2023
gsl::copy is not in the Core Guidelines Open

isocpp/CppCoreGuidelines#2111 · 2 comments · 1 assignee · Opened Jul 25, 2023
`[[nodiscard]]` advice is largely absent Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2109 · 14 comments · 13 reactions · Opened Jul 4, 2023
T.65 Is tag dispatch antiquated? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2108 · 1 comment · 2 reactions · Opened Jun 30, 2023
F.8 Add short explanation what "pure function" is Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

isocpp/CppCoreGuidelines#2107 · Opened Jun 28, 2023
Suggestion for CP.201: Avoid volatile compound operations Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2106 · 1 reaction · Opened Jun 24, 2023
Additions to T.144: Don’t specialize function templates Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2105 · 2 comments · 1 reaction · Opened Jun 24, 2023
Example for T.122 Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

isocpp/CppCoreGuidelines#2103 · 4 comments · Opened Jun 24, 2023
T.70 Prefer if constexpr to function template overloading Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2099 · 15 comments · 5 reactions · Opened Jun 23, 2023
T.126 Use a common function for runtime/compile-time evaluation, and `std::is_constant_evaluated()` if necessary Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2095 · Opened Jun 23, 2023
T.101 Proposal for how to pass arguments to a variadic template Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

isocpp/CppCoreGuidelines#2094 · Opened Jun 23, 2023
T.100 Suggested Example Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

isocpp/CppCoreGuidelines#2093 · 3 comments · 1 reaction · Opened Jun 23, 2023
T.103 should be removed or limited to immutable argument lists Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2086 · 1 reaction · Opened Jun 23, 2023
How to build this site locally? For Offline usage Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2083 · Opened May 30, 2023
Enum.7 Reason text is misleading Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

isocpp/CppCoreGuidelines#2079 · Opened May 24, 2023
F.60 seems out of place Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

isocpp/CppCoreGuidelines#2077 · Opened May 10, 2023
Markdown: jump in references don't match header line anchors Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

isocpp/CppCoreGuidelines#2073 · 5 comments · 3 reactions · Opened Apr 28, 2023
C.67: Does a class marked final prevent slicing? Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

isocpp/CppCoreGuidelines#2072 · 1 reaction · Opened Apr 27, 2023
F.47: Return T& from assignment operators Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

isocpp/CppCoreGuidelines#2069 · Opened Apr 19, 2023
Provide support for "safe" and "simple" binary I/O in the GSL Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

isocpp/CppCoreGuidelines#2067 · 2 comments · Opened Apr 18, 2023
When to use trailing return type syntax Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

isocpp/CppCoreGuidelines#2066 · 17 comments · Opened Apr 17, 2023

isocpp/CppCoreGuidelines

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