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Jeffrey Yu, David Baron2

Mar 27

Help with diagnosing a tricky bug

My intuition would be that "garbage characters" would be the normal failure mode for the

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Help with diagnosing a tricky bug

My intuition would be that "garbage characters" would be the normal failure mode for the

Mar 27

Stefan Zager, … Daniel Cheng5

Mar 17

I've also filed crbug.com/493534962 to consider allowing more use of range views. Daniel On Tue,

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I've also filed crbug.com/493534962 to consider allowing more use of range views. Daniel On Tue,

Mar 17

Jan Wilken Dörrie, … Thomas Sepez25

Mar 10

Proposal: Allow std::from_range and direct std::ranges::to

> No problem :) Considering we'll flag usages of `std::ranges::operator|` soon, are there any

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Proposal: Allow std::from_range and direct std::ranges::to

> No problem :) Considering we'll flag usages of `std::ranges::operator|` soon, are there any

Mar 10

Peter Kasting, … Sergey Markelov10

Mar 5

It's time to default-allow C++20

On Tue, 3 Feb 2026 at 11:28:24 UTC-7, Daniel Cheng wrote: The binary size implications won't have

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It's time to default-allow C++20

On Tue, 3 Feb 2026 at 11:28:24 UTC-7, Daniel Cheng wrote: The binary size implications won't have

Mar 5

Asami Doi, … Justin Novosad8

Feb 24

[cxx] Request for C++ Style Exception: std::function for Swift/C++ Interop

To codify the exception, just go to src/PRESUBMIT.py and find the "BanRule" for "std::

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[cxx] Request for C++ Style Exception: std::function for Swift/C++ Interop

To codify the exception, just go to src/PRESUBMIT.py and find the "BanRule" for "std::

Feb 24

Hiroshige Hayashizaki, … Adam Rice3

Feb 16

style reformatting: from "value /*arg*/" to "/*arg=*/value"

I'm not a global OWNER, but I'm in favour of this. I often have to correct this in code

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style reformatting: from "value /*arg*/" to "/*arg=*/value"

I'm not a global OWNER, but I'm in favour of this. I often have to correct this in code

Feb 16

Avi Drissman, … Joe Mason19

Feb 12

std::unordered_map and std::unordered_set

Yikes, this thread's moved along since I bookmarked it to reply to... Based on the results of the

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std::unordered_map and std::unordered_set

Yikes, this thread's moved along since I bookmarked it to reply to... Based on the results of the

Feb 12

Erik Chen, … Joe Mason3

Feb 12

Question about base/containers/README.md

The Catan team did an investigation of absl maps performance at the end of last year. TLDR: compared

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Question about base/containers/README.md

The Catan team did an investigation of absl maps performance at the end of last year. TLDR: compared

Feb 12

Thomas Sepez, … Kyle Charbonneau8

Jan 28

Status of std::string::insert_range

Do we usually consider these new convenience methods allowed by default if they're not otherwise

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Status of std::string::insert_range

Do we usually consider these new convenience methods allowed by default if they're not otherwise

Jan 28

Daniel Cheng, Nico Weber2

Jan 27

Allow std::optional::and_then, std::optional::or_else, and std::optional::transform

lgtm Part of the reason for the policy is that the TBD->Propose->Allow flow: 1. Raises

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Allow std::optional::and_then, std::optional::or_else, and std::optional::transform

lgtm Part of the reason for the policy is that the TBD->Propose->Allow flow: 1. Raises

Jan 27

Victor Vianna, … Joe Mason3

Jan 27

Proposal: allow std::out_ptr and std::inout_ptr

It's also worth deciding whether we should allow people to define specializations of std::

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Proposal: allow std::out_ptr and std::inout_ptr

It's also worth deciding whether we should allow people to define specializations of std::

Jan 27

Thomas Sepez, Jan Wilken Dörrie3

Jan 26

std::views::as_rvalue() banned?

Ah, thanks, good to know base/ already has this covered. On Sun, Jan 25, 2026, 10:19 AM Jan Wilken

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std::views::as_rvalue() banned?

Ah, thanks, good to know base/ already has this covered. On Sun, Jan 25, 2026, 10:19 AM Jan Wilken

Jan 26

Victor Vianna, … Marshall Greenblatt10

Jan 22

RFC: replacing base::Contains()

On Mon, Jan 5, 2026 at 5:02 PM 'Victor Vianna' via cxx <c...@chromium.org> wrote: I

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RFC: replacing base::Contains()

On Mon, Jan 5, 2026 at 5:02 PM 'Victor Vianna' via cxx <c...@chromium.org> wrote: I

Jan 22

Victor Vianna, … Joe Mason6

Jan 21

Proposal: allow static operators () and []

On Tue, Jan 20, 2026 at 8:15 PM 'Victor Vianna' via cxx <c...@chromium.org> wrote: >

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Proposal: allow static operators () and []

On Tue, Jan 20, 2026 at 8:15 PM 'Victor Vianna' via cxx <c...@chromium.org> wrote: >

Jan 21

Tommy Nyquist, … Jeremy Roman3

Jan 21

Clarification on CHECK() guidance for pointer dereferences (and history of style guide change)

On Tue, Jan 20, 2026 at 10:50 AM Kyle Charbonneau <kyle...@chromium.org> wrote: (1) Do we

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Clarification on CHECK() guidance for pointer dereferences (and history of style guide change)

On Tue, Jan 20, 2026 at 10:50 AM Kyle Charbonneau <kyle...@chromium.org> wrote: (1) Do we

Jan 21

Victor Vianna, … Jan Wilken Dörrie4

Jan 14

Proposal: allow `if consteval`

+1. This removes a bit gotcha with std::is_constant_evaluated(), which needs to be used with a

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Proposal: allow `if consteval`

+1. This removes a bit gotcha with std::is_constant_evaluated(), which needs to be used with a

Jan 14

Thomas Sepez, … Daniel Cheng4

Jan 13

c++23 std::from_range form of vector constructor

The other thread is https://groups.google.com/a/chromium.org/g/cxx/c/ZzSLYf6-KwQ Daniel On Tue, 13

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c++23 std::from_range form of vector constructor

The other thread is https://groups.google.com/a/chromium.org/g/cxx/c/ZzSLYf6-KwQ Daniel On Tue, 13

Jan 13

Victor Vianna, … Kyle Charbonneau5

Jan 8

Proposal: allow new ranges algorithms

sgtm me too since we have a thread for addressing existing base::Contains() usage. On Thu, Jan 8,

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Proposal: allow new ranges algorithms

sgtm me too since we have a thread for addressing existing base::Contains() usage. On Thu, Jan 8,

Jan 8

Victor Vianna, … Daniel Cheng4

Jan 6

Proposal: allow std::basic_string::contains

+1, thanks! Daniel On Tue, 6 Jan 2026 at 10:31, 'Avi Drissman' via cxx <c...@chromium.org

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Proposal: allow std::basic_string::contains

+1, thanks! Daniel On Tue, 6 Jan 2026 at 10:31, 'Avi Drissman' via cxx <c...@chromium.org

Jan 6

Victor Vianna, … David Benjamin9

Jan 6

Proposal: allow #elifdef and #elifndef

> At a glance, that one might actually be fine with the .*, though adding a test is probably

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Proposal: allow #elifdef and #elifndef

> At a glance, that one might actually be fine with the .*, though adding a test is probably

Jan 6

David Benjamin, … Nico Weber5

Jan 6

Proposal: allow std::byteswap from C++23

I went ahead and lg'd the CL, since this looks very uncontroversial :) On Tue, Jan 6, 2026 at 10:

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Proposal: allow std::byteswap from C++23

I went ahead and lg'd the CL, since this looks very uncontroversial :) On Tue, Jan 6, 2026 at 10:

Jan 6

Erik Jensen, … Hans Wennborg23

12/9/25

Experiment with Coroutines in //remoting?

If Chromium were to decide that it's a priority, we could make them supported. If MSVC can do it,

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Experiment with Coroutines in //remoting?

If Chromium were to decide that it's a priority, we could make them supported. If MSVC can do it,

12/9/25

Avi Drissman, … Joe Mason61

12/8/25

base::ByteCount

FYI, I have a patch in review to convert SystemMemoryInfo to use ByteSize instead of ByteCount. I

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base::ByteCount

FYI, I have a patch in review to convert SystemMemoryInfo to use ByteSize instead of ByteCount. I

12/8/25

Victor Vianna, … Erik Staab7

11/19/25

Rolling out C++23

Re compile size: the compile size builder isn't using modules and there are folks very actively

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Rolling out C++23

Re compile size: the compile size builder isn't using modules and there are folks very actively

11/19/25

Kalvin Lee, Michael Lippautz3

10/20/25

Updating Miracleptr usage guidance (n.b. renderer code)

Thanks for the input. The reference to Member<T> garbage_collected; has been dropped in

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Updating Miracleptr usage guidance (n.b. renderer code)

Thanks for the input. The reference to Member<T> garbage_collected; has been dropped in

10/20/25

Daniel Cheng, Elly3

10/1/25

Default base::JSONReader::Read() to RFC mode?

As of crrev.com/1519103, the JSONReader helpers no longer default to `JSON_PARSE_CHROMIUM_EXTENSIONS`

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Default base::JSONReader::Read() to RFC mode?

As of crrev.com/1519103, the JSONReader helpers no longer default to `JSON_PARSE_CHROMIUM_EXTENSIONS`

10/1/25

Joe Mason, … John Admanski5

9/18/25

absl/hash banned in DEPS?

I ended up refactoring my tests to use absl::flat_hash_map anyway, just because they were simpler

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absl/hash banned in DEPS?

I ended up refactoring my tests to use absl::flat_hash_map anyway, just because they were simpler

9/18/25

Peter Kasting, … Nico Weber19

9/3/25

Indenting for nested preprocessor directives

But we don't do that. We use style=chromium. I disagree that we are beholden to the clang-format

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Indenting for nested preprocessor directives

But we don't do that. We use style=chromium. I disagree that we are beholden to the clang-format

9/3/25

Joe Mason, … Andrew Grieve15

9/2/25

Effect of "static constexpr" in functions

Thanks, everything is working as intended then. I was just confused by the UI. On Tue, Sep 2, 2025 at

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Effect of "static constexpr" in functions

Thanks, everything is working as intended then. I was just confused by the UI. On Tue, Sep 2, 2025 at

9/2/25

Daniel Cheng, … Roland Bock7

8/19/25

Soliciting feedback for C++ portions of Chromium University

Hi, Some thoughts: C++ Memory: Slide 6 "C++ is extremely low level.". I would probably say

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Soliciting feedback for C++ portions of Chromium University

Hi, Some thoughts: C++ Memory: Slide 6 "C++ is extremely low level.". I would probably say

8/19/25

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