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, 4 insertions, 4 deletions

diff --git a/mingling_core/src/renderer/render_result.rs b/mingling_core/src/renderer/render_result.rs
index e57a5b9..763f6fc 100644
--- a/mingling_core/src/renderer/render_result.rs
+++ b/mingling_core/src/renderer/render_result.rs
@@ -132,8 +132,8 @@ impl RenderResult {
     /// result.print(", world!");
     /// assert_eq!(result.deref(), "Hello, world!");
     /// ```
-    pub fn print(&mut self, text: &str) {
-        self.render_text.push_str(text);
+    pub fn print(&mut self, text: impl AsRef<str>) {
+        self.render_text.push_str(text.as_ref());
     }
 
     /// Appends the given text followed by a newline to the rendered content.
@@ -149,8 +149,8 @@ impl RenderResult {
     /// result.println("Second line");
     /// assert_eq!(result.deref(), "First line\nSecond line\n");
     /// ```
-    pub fn println(&mut self, text: &str) {
-        self.render_text.push_str(text);
+    pub fn println(&mut self, text: impl AsRef<str>) {
+        self.render_text.push_str(text.as_ref());
         self.render_text.push('\n');
     }