feat: require renderers to return RenderResult instead of mutating one

BREAKING CHANGE: The `render` method on `Renderer`, `HelpRequest`, and
`ProgramCollect` now returns `RenderResult` instead of taking
`&mut RenderResult`. The `r_print!` and `r_println!` macros have been
removed in favor of using `std::io::Write` directly on `RenderResult`.

1 files changed, 3 insertions, 3 deletions

diff --git a/mingling_core/src/program/collection/mock.rs b/mingling_core/src/program/collection/mock.rs
index 568000a..20e6658 100644
--- a/mingling_core/src/program/collection/mock.rs
+++ b/mingling_core/src/program/collection/mock.rs
@@ -7,7 +7,7 @@ use crate::Dispatcher;
 use crate::{AnyOutput, ChainProcess, Groupped, ProgramCollect, RenderResult};
 
 #[cfg(feature = "structural_renderer")]
-use crate::{StructuralRendererSetting, error::StructuralRendererSerializeError};
+use crate::{error::StructuralRendererSerializeError, StructuralRendererSetting};
 
 #[cfg(feature = "comp")]
 use crate::{ShellContext, Suggest};
@@ -59,11 +59,11 @@ impl ProgramCollect for MockProgramCollect {
         unreachable!()
     }
 
-    fn render(_any: AnyOutput<Self::Enum>, _r: &mut RenderResult) {
+    fn render(_any: AnyOutput<Self::Enum>) -> RenderResult {
         unreachable!()
     }
 
-    fn render_help(_any: AnyOutput<Self::Enum>, _r: &mut RenderResult) {
+    fn render_help(_any: AnyOutput<Self::Enum>) -> RenderResult {
         unreachable!()
     }