Function demangle_function_name 

pub fn demangle_function_name(name: &str) -> String

Demangle a Rust function name if it’s mangled.

This function handles both legacy and v0 mangling schemes:

• Legacy: starts with _ZN
• v0: starts with _RNv

If the name is not mangled (already human-readable), it returns the original name unchanged.

Arguments

• name - The potentially mangled function name

Returns

The demangled function name, or the original if not mangled.

Example

use debtmap::risk::lcov::demangle::demangle_function_name;

// Already demangled - returns as-is
let name = "my_module::my_function";
assert_eq!(demangle_function_name(name), name);

// Mangled name - returns demangled
let mangled = "_ZN3foo3barE";
let demangled = demangle_function_name(mangled);
assert!(!demangled.starts_with("_ZN"));

Performance

O(n) where n is the length of the mangled name. Single pass through the string with minimal allocations.