Large numeric litteral are hard to read

[BijanVeyssi]

What language does this apply to? It applies to the Text Format Language.

Describe the problem you are trying to solve. I am currently writing big numbers in protobuf text format and it is pretty hard to read. That is why I would like to improve the readability.

Describe the solution you'd like I would like to have to support of underscores inside numeric litterals. e.g.:

• 250000 can be written 250_000
• 0xFFFEFFEF can be written 0xFF_FE_FF_EF

Of course, having it working with octal might also be useful for someone else.

Describe alternatives you've considered Since many other languages such as c++, rust, python, Toml implements _ inside numeric litteral I think it is one of the best solution for readability.

[zhangskz]

We've actually gotten a related proposal internally to add FieldOptions to specify how integers should be printed in text format that I think would be related to this case (although not specifically with the 250_000 type formatting). Let me follow up and see where that proposal landed.

I believe this is something we're unlikely to have capacity to staff ourselves otherwise though given priorities.

[googleberg]

For consideration in #edition2024

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[googleberg]

Still considering for #edition2024

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