Module stack_str 

A stack-allocated ASCII string type for efficient identifier storage.

This module provides StackStr, a fixed-capacity string type optimized for short identifier strings. Designed for use cases where:

• Strings are known to be short (≤36 characters).
• Stack allocation is preferred over heap allocation.
• Copy semantics are beneficial.
• C FFI compatibility is required.

ASCII requirement

StackStr only accepts ASCII strings. This guarantees that 1 character == 1 byte, ensuring the buffer always holds exactly the capacity in characters. This aligns with identifier conventions which are inherently ASCII.

Property	ASCII	UTF-8
Bytes per char	Always 1	1-4
36 bytes holds	36 chars	9-36 chars
Slice at any byte	Safe	May split codepoint
len() == char count	Yes	No

Structs

StackStr

A stack-allocated ASCII string with a maximum capacity of 36 characters.

Constants

STACKSTR_CAPACITY

Maximum capacity in characters for a StackStr.