feat(core, macros): add r_append! macro and RenderResult::append_other

Implement `RenderResult::append_other()` to merge buffered content and
immediate output behavior from one result into another. Add the
`r_append!` macro with both explicit buffer (`dst, src`) and implicit
buffer (`src`) usage forms, re-exported from `mingling::prelude`.

1 files changed, 6 insertions, 0 deletions

diff --git a/mingling/src/lib.rs b/mingling/src/lib.rs
index 3539647..457f393 100644
--- a/mingling/src/lib.rs
+++ b/mingling/src/lib.rs
@@ -98,6 +98,9 @@ pub mod macros {
     /// `#[program_setup]` - Used to generate program setup
     #[cfg(feature = "extra_macros")]
     pub use mingling_macros::program_setup;
+    /// `r_append!` - Appends the contents of one `RenderResult` to another.
+    /// See the macro documentation for implicit vs. explicit buffer usage.
+    pub use mingling_macros::r_append;
     /// `r_eprint!` - Prints text to a `RenderResult` error buffer (without newline).
     /// See the macro documentation for implicit vs. explicit buffer usage.
     pub use mingling_macros::r_eprint;
@@ -235,6 +238,9 @@ pub mod prelude {
     /// Like `pack!` but also marks the type for structured output
     #[cfg(all(feature = "macros", feature = "structural_renderer"))]
     pub use mingling_macros::pack_structural;
+    /// `r_append!` - Appends the contents of one `RenderResult` to another.
+    /// See the macro documentation for implicit vs. explicit buffer usage.
+    pub use mingling_macros::r_append;
     /// `r_eprint!` - Prints text to a `RenderResult` error buffer (without newline).
     /// See the macro documentation for implicit vs. explicit buffer usage.
     pub use mingling_macros::r_eprint;