3 files changed, 91 insertions, 70 deletions

diff --git a/examples/full-todolist/src/help.rs b/examples/full-todolist/src/help.rs
index ab33176..2f8228a 100644
--- a/examples/full-todolist/src/help.rs
+++ b/examples/full-todolist/src/help.rs
@@ -1,15 +1,16 @@
 //! This module provides help information for the `todolist` command line program
 
-use mingling::macros::{help, r_println};
-
 use crate::{EntryAdd, EntryClean, EntryComplete, EntryList, ErrorDispatcherNotFound};
+use mingling::{RenderResult, macros::help};
+use std::io::Write;
 
+/// Shows the global help message.
 #[help]
-pub fn help_global(_p: ErrorDispatcherNotFound) {
-    r_println!(
-        "{}",
-        r"
-Usage: todolist [command] [args]
+pub fn help_global(_p: ErrorDispatcherNotFound) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(
+        render_result,
+        r"Usage: todolist [command] [args]
 
 Commands:
   add            -- Add a new task
@@ -20,74 +21,78 @@ Commands:
 Args:
   -h, --help     -- Show this help message
   -V, --version  -- Show the version
-  -A, --all      -- All tasks (Clean all / List all)
-            "
-        .trim()
-    );
+  -A, --all      -- All tasks (Clean all / List all)"
+    )
+    .ok();
+    render_result
 }
 
+/// Shows help for the `add` command.
 #[help]
-pub fn help_add(_p: EntryAdd) {
-    r_println!(
-        "{}",
-        r"
-Usage: todolist add [task description]
+pub fn help_add(_p: EntryAdd) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(
+        render_result,
+        r"Usage: todolist add [task description]
 
 Add a new task to the todo list.
 
 Example:
   todolist add 'Buy groceries'
-  todolist add 'Finish Rust project'
-            "
-        .trim()
-    );
+  todolist add 'Finish Rust project'"
+    )
+    .ok();
+    render_result
 }
 
+/// Shows help for the `list` command.
 #[help]
-pub fn help_list(_p: EntryList) {
-    r_println!(
-        "{}",
-        r"
-Usage: todolist list
+pub fn help_list(_p: EntryList) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(
+        render_result,
+        r"Usage: todolist list
 
 List all tasks.
 
 Example:
-  todolist list
-            "
-        .trim()
-    );
+  todolist list"
+    )
+    .ok();
+    render_result
 }
 
+/// Shows help for the `complete` command.
 #[help]
-pub fn help_complete(_p: EntryComplete) {
-    r_println!(
-        "{}",
-        r"
-Usage: todolist complete [task_id]
+pub fn help_complete(_p: EntryComplete) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(
+        render_result,
+        r"Usage: todolist complete [task_id]
 
 Mark a task as complete by its ID.
 
 Example:
   todolist complete 1
-  todolist complete 3
-            "
-        .trim()
-    );
+  todolist complete 3"
+    )
+    .ok();
+    render_result
 }
 
+/// Shows help for the `clean` command.
 #[help]
-pub fn help_clean(_p: EntryClean) {
-    r_println!(
-        "{}",
-        r"
-Usage: todolist clean
+pub fn help_clean(_p: EntryClean) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(
+        render_result,
+        r"Usage: todolist clean
 
 Remove all completed tasks from the list.
 
 Example:
-  todolist clean
-            "
-        .trim()
-    );
+  todolist clean"
+    )
+    .ok();
+    render_result
 }
diff --git a/examples/full-todolist/src/main.rs b/examples/full-todolist/src/main.rs
index e4c5aa6..0748832 100644
--- a/examples/full-todolist/src/main.rs
+++ b/examples/full-todolist/src/main.rs
@@ -7,12 +7,13 @@
 //! > This is truly a cliché example, as common as `Hello World`!
 
 use mingling::{
+    LazyInit, LazyRes,
     macros::route,
     prelude::*,
     res::ResExitCode,
-    setup::{ExitCodeSetup, StructuralRendererSetup, HelpFlagSetup},
-    LazyInit, LazyRes,
+    setup::{ExitCodeSetup, HelpFlagSetup, StructuralRendererSetup},
 };
+use std::io::Write;
 
 mod help;
 pub use help::*;
@@ -160,38 +161,47 @@ fn handle_clean(
     }
 }
 
+/// Renders error when no task description is provided.
 #[renderer]
-fn render_error_no_task_description_provided(
+pub fn render_error_no_task_description_provided(
     _err: ErrorNoTaskDescriptionProvided,
     // ExitCode
     ec: &mut ResExitCode,
-) {
-    r_println!("No task description provided!");
-    r_println!("");
-    r_println!("Use `todolist add <desc>` to add a task");
+) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(render_result, "No task description provided!").ok();
+    writeln!(render_result).ok();
+    writeln!(render_result, "Use `todolist add <desc>` to add a task").ok();
     ec.exit_code = 1;
+    render_result
 }
 
+/// Renders error when no index is provided.
 #[renderer]
-fn render_error_no_index_provided(
+pub fn render_error_no_index_provided(
     _err: ErrorNoIndexProvided,
     // ExitCode
     ec: &mut ResExitCode,
-) {
-    r_println!("No index provided!");
-    r_println!("");
-    r_println!("Use `todolist list` to query indexes");
+) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(render_result, "No index provided!").ok();
+    writeln!(render_result).ok();
+    writeln!(render_result, "Use `todolist list` to query indexes").ok();
     ec.exit_code = 2;
+    render_result
 }
 
+/// Renders error when index is out of bounds.
 #[renderer]
-fn render_error_index_out_of_bounds(
+pub fn render_error_index_out_of_bounds(
     _err: ErrorIndexOutOfBounds,
     // ExitCode
     ec: &mut ResExitCode,
-) {
-    r_println!("Index out of bounds!");
+) -> RenderResult {
+    let mut render_result = RenderResult::new();
+    writeln!(render_result, "Index out of bounds!").ok();
     ec.exit_code = 3;
+    render_result
 }
 
 gen_program!();
diff --git a/examples/full-todolist/src/todolist.rs b/examples/full-todolist/src/todolist.rs
index e447f5d..71338c3 100644
--- a/examples/full-todolist/src/todolist.rs
+++ b/examples/full-todolist/src/todolist.rs
@@ -1,10 +1,8 @@
 //! Data structures, read and write logic for the todo list
 
-use mingling::{
-    macros::{r_println, renderer},
-    Groupped,
-};
+use mingling::{Groupped, RenderResult, macros::renderer};
 use serde::{Deserialize, Serialize};
+use std::io::Write;
 use std::{env::current_dir, path::PathBuf};
 
 use crate::ResProgramFlags;
@@ -37,22 +35,30 @@ pub fn read_todo_list() -> ResTodoList {
     serde_json::from_reader(reader).unwrap_or_default()
 }
 
+/// Renders the todo list.
 #[renderer]
-pub fn render_res_todo_list(todo_list: ResTodoList, program_flags: &ResProgramFlags) {
+pub fn render_res_todo_list(
+    todo_list: ResTodoList,
+    program_flags: &ResProgramFlags,
+) -> RenderResult {
+    let mut render_result = RenderResult::new();
     let mut idx = 0;
-    r_println!("TODO: ");
+    writeln!(render_result, "TODO: ").ok();
     for item in &todo_list.items {
         if item.completed && !program_flags.all {
             idx += 1;
             continue;
         }
-        r_println!(
+        writeln!(
+            render_result,
             "  {idx}. [{}] - \"{}\"",
             if item.completed { "x" } else { " " },
             item.item
-        );
+        )
+        .ok();
         idx += 1;
     }
+    render_result
 }
 
 pub fn write_todo_list(todo_list: ResTodoList) {