0.17.0

Fix unnecessary heap allocations in string() on value types

string() on Method, Status, MediaType, NoAcceptableType, and internal value types was heap-allocating on every call. Stringable requires a String iso^ return, so each implementation called .clone() on a string literal — turning a free interned lookup into a heap allocation. These types now return String val, and the compiler interns the literals.

Remove Stringable conformance from Method, Status, MediaType, and NoAcceptableType

Method, Status, MediaType, and NoAcceptableType no longer conform to Stringable. Their string() methods return String val instead of String iso^.

Code that passes one of these types where Stringable is expected needs to call string() explicitly:

Before:

fun log(s: Stringable) => _env.out.print(s.string())

log(GET)  // worked when GET was Stringable

After:

log(GET.string())

Code that consumed the iso return also needs updating:

Before:

let s: String iso = GET.string()

After:

let s: String val = GET.string()

Update to work with ponyc 0.78.0

ponyc 0.78.0 changed the Stringable interface. string() now returns String instead of String iso^. We have updated accordingly.

[0.17.0] - 2026-11-06

Fixed

• Fix unnecessary heap allocations in string() on value types (PR #187)

Changed

• Remove Stringable conformance from Method, Status, MediaType, and NoAcceptableType (PR #187)
• Update to work with ponyc 0.78.0 (PR #188)