[aragonite]

When trying to understand complex C codebase I've often found it helpful to rename existing variable as emojis. This makes it much easier to track which variables are used where & to take in the pure structure of the code at one glance. An example I posted previously: https://imgur.com/F27ZNfk

Unfortunately most modern languages like Rust and JS follow the XID_Start/XID_Continue recommendation (not very well-motivated imo) which excludes all emoji characters from identifiers.

[unstuck3958]

wouldn't writing a parser of sorts that would replace emojis with a valid alphabetical string identifier be trivial?

[aragonite]

You're right that writing a preprocessor would be straightforward. But while you're actively editing the code, your dev experience will still be bad: the editor will flag emoji identifiers as syntax errors so mass renaming & autocompletion won't work properly. Last time I looked into this in VSCode I got TypeScript to stop complaining about syntax errors by patching the identifier validation with something like `if (code>127) return true` (if non-ascii, consider valid) in isUnicodeIdentifierStart/isUnicodeIdentifierPart [1]. But then you'd also need to patch the transpiler to JS, formatters like Prettier, and any other tool in your workflow that embeds their own version of TypeScript...

[1] https://github.com/microsoft/TypeScript/blob/81c951894e93bdc...