Naming conventions #861

jonmeow · 2021-09-29T20:09:06Z

For idiomatic Carbon code:
- UpperCamelCase will be used when the identifier can be resolved to a
  specific value at compile-time.
- lower_snake_case will be used when the identifier's value won't be
  known until runtime, such as for variables.
For Carbon-provided features:
- Keywords and type literals will use lower_snake_case.
- Other code will use the guidelines for idiomatic Carbon code.

jonmeow · 2021-09-30T19:45:51Z

@zygoloid @chandlerc Note, I'm trying to interpret the current rationale for the naming decision. I think I've accurately captured your perspective now: I had definitely misunderstood some of the discussions, but a quick thread with Chandler hopefully cleared that up. Given I may be inserting the wrong words into your mouths, please let me know if I'm still wrong.

proposals/p0861.md

jonmeow

Addressing comments

proposals/p0861.md

chandlerc

Trying to get back to this, again sorry for the delay. Suggestions and comments inline, and thanks for working on pulling all the different discussions together into a proposal.

chandlerc · 2022-01-07T08:50:17Z

proposals/p0861.md

+    -   `UpperCamelCase` will be used when the identifier can be resolved to a
+        specific value at compile-time.


I'm curious, would "value or entity" wore better or worse here?

Suggested change

- `UpperCamelCase` will be used when the identifier can be resolved to a

specific value at compile-time.

- `UpperCamelCase` will be used when the identifier can be resolved to a

specific value or entity at compile-time.

Specifically thinking about namespaces. @zygoloid might have thoughts on the specific wording of this.

An alternative way to phrase this we could consider: "UpperCamelCase will be used when the identifier names a specific program entity, such as a function, a namespace, or a compile-time constant value." This tries to anchor more on the "proper noun" kind of rationale.

Using the second suggestion, since I assume you prefer it.

One phrasing that came up in discussion with @chandlerc: "if the named entity cannot have a dynamically varying value".

FWIW, I think I prefer the latest version ("... names a specific program entity, such as ....") slightly over "cannot have a dynamically varying value". Maybe they could be combined?

Tried rephrasing...

I'm happy with the phrasing that you ended up with. I feel like I could apply it to understand why function parameters get one result and template/generic parameters get another result, and why a local let a: i32 binding gets one result but a global let A: i32 binding gets a different result.

proposals/p0861.md

chandlerc · 2022-01-07T08:58:27Z

proposals/p0861.md

+Private member variables should use a `_` suffix in order to prevent name
+collisions. We discourage private properties.


Could we skip this suggestion, at least for now? I'm not sure it will be needed in Carbon, and I'd rather not get ahead of that design.

Moved to an open question; I would emphasize, after #720 #898 #970, I'd really like to avoid digging the same hole in early Carbon code.

I'd just like to avoid pre-adopting a workaround for an avoidable design problem... Thanks for moving this to an open question, would it be OK to remove it from the list above as well?

Okay, but I'm a bit confused by your request... All I see in the above list is properties with no mention of _, so I assume you mean to remove properties altogether -- gone.

proposals/p0861.md

Co-authored-by: Chandler Carruth <chandlerc@gmail.com>

jonmeow

Addressing comments

jonmeow · 2022-01-07T23:28:43Z

proposals/p0861.md

+    -   `UpperCamelCase` will be used when the identifier can be resolved to a
+        specific value at compile-time.


Using the second suggestion, since I assume you prefer it.

proposals/p0861.md

jonmeow · 2022-01-07T23:29:30Z

proposals/p0861.md

+Private member variables should use a `_` suffix in order to prevent name
+collisions. We discourage private properties.


Moved to an open question; I would emphasize, after #720 #898 #970, I'd really like to avoid digging the same hole in early Carbon code.

chandlerc

I think the only main thing left is making sure we've converged on the least confusing phrasing for the UpperCase stuff. Some minor things elsewhere....

proposals/p0861.md

chandlerc · 2022-01-21T09:48:15Z

proposals/p0861.md

+    -   `UpperCamelCase` will be used when the identifier can be resolved to a
+        specific value at compile-time.


FWIW, I think I prefer the latest version ("... names a specific program entity, such as ....") slightly over "cannot have a dynamically varying value". Maybe they could be combined?

chandlerc · 2022-01-21T09:50:13Z

proposals/p0861.md

+Private member variables should use a `_` suffix in order to prevent name
+collisions. We discourage private properties.


I'd just like to avoid pre-adopting a workaround for an avoidable design problem... Thanks for moving this to an open question, would it be OK to remove it from the list above as well?

proposals/p0861.md

Co-authored-by: Chandler Carruth <chandlerc@gmail.com>

…eow/carbon-lang into proposal-naming-conventions

jonmeow

Addressing comments

jonmeow · 2022-01-21T18:59:32Z

proposals/p0861.md

+Private member variables should use a `_` suffix in order to prevent name
+collisions. We discourage private properties.


Okay, but I'm a bit confused by your request... All I see in the above list is properties with no mention of _, so I assume you mean to remove properties altogether -- gone.

jonmeow · 2022-01-21T19:07:10Z

proposals/p0861.md

+    -   `UpperCamelCase` will be used when the identifier can be resolved to a
+        specific value at compile-time.


Tried rephrasing...

proposals/p0861.md

chandlerc

LGTM with a minor tweak to Base below!

proposals/p0861.md

Co-authored-by: Richard Smith <richard@metafoo.co.uk>

Co-authored-by: josh11b <josh11b@users.noreply.github.com>

A pretty straight copy of #861. Cutting down README.md example text since it seemed a little redundant with examples in the bullets.

- For idiomatic Carbon code: - `UpperCamelCase` will be used when the identifier can be resolved to a specific value at compile-time. - `lower_snake_case` will be used when the identifier's value won't be known until runtime, such as for variables. - For Carbon-provided features: - Keywords and type literals will use `lower_snake_case`. - Other code will use the guidelines for idiomatic Carbon code. Co-authored-by: Chandler Carruth <chandlerc@gmail.com> Co-authored-by: Richard Smith <richard@metafoo.co.uk> Co-authored-by: josh11b <josh11b@users.noreply.github.com>

A pretty straight copy of #861. Cutting down README.md example text since it seemed a little redundant with examples in the bullets.

Primitive types have been renamed in pull request carbon-language#861 and also the design document.

Primitive types have been renamed in pull request #861 and also the design document.

jonmeow added the proposal A proposal label Sep 29, 2021

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jonmeow mentioned this pull request Jan 29, 2022

Merge naming conventions #861 into the design #1056

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jonmeow added a commit that referenced this pull request Jan 29, 2022

Merge naming conventions #861 into the design (#1056)

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A pretty straight copy of #861. Cutting down README.md example text since it seemed a little redundant with examples in the bullets.

chandlerc pushed a commit that referenced this pull request Jun 28, 2022

Merge naming conventions #861 into the design (#1056)

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A pretty straight copy of #861. Cutting down README.md example text since it seemed a little redundant with examples in the bullets.

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Naming conventions for Carbon-provided features #750

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Fix spelling of primitive types

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Primitive types have been renamed in pull request carbon-language#861 and also the design document.

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Fix spelling of primitive types #1663

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Fix spelling of primitive types

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Primitive types have been renamed in pull request carbon-language#861 and also the design document.

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Fix spelling of primitive types (#1663)

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Primitive types have been renamed in pull request #861 and also the design document.

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Naming conventions #861

Naming conventions #861

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		- `UpperCamelCase` will be used when the identifier can be resolved to a
		specific value at compile-time.

		Private member variables should use a `_` suffix in order to prevent name
		collisions. We discourage private properties.

Naming conventions #861

Naming conventions #861

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jonmeow commented Sep 29, 2021 •

edited