feat(macros): add `#[buffer]` attribute and re-export `r_print!(ln)`

macros

Reintroduce `r_print!` and `r_println!` macros as public exports, now
supporting both explicit buffer argument and implicit `#[buffer]` attr.
Add `#[buffer]` attribute macro that wraps unit-returning functions to
produce a `RenderResult` with an automatically injected buffer variable.
Relax `RenderResult::print()` and `println()` to accept `impl
AsRef<str>`.

1 files changed, 3 insertions, 0 deletions

diff --git a/mingling_macros/src/extensions.rs b/mingling_macros/src/extensions.rs
index aff20e2..022761b 100644
--- a/mingling_macros/src/extensions.rs
+++ b/mingling_macros/src/extensions.rs
@@ -13,6 +13,9 @@ use syn::{Ident, Token};
 #[cfg(feature = "extra_macros")]
 pub(crate) mod routeify;
 
+/// Extension: `#[buffer]` — wraps a unit-returning function to return `RenderResult`.
+pub(crate) mod buffer;
+
 /// Parsed extensions from an attribute macro like `#[chain(routeify, other_ext)]`.
 pub(crate) struct Extensions {
     pub(crate) exts: Vec<Ident>,