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|
//! Example Hook
//!
//! > This example demonstrates how to use Mingling's hook system to obtain debugging information during program execution
//!
//! Run:
//! ```base
//! cargo run --manifest-path examples/example-hook/Cargo.toml --quiet -- greet Alice
//! ```
//!
//! Output:
//! ```plaintext
//! [DEBUG] Program is begin
//! [DEBUG] Pre dispatch: ["greet", "Alice"]
//! [DEBUG] Post dispatch: EntryGreet
//! [DEBUG] Pre chain: EntryGreet
//! [DEBUG] Post chain: ResultName
//! [DEBUG] Pre render: ResultName
//! [DEBUG] Post render
//! [DEBUG] Program end
//! Hello, Alice!
//! ```
use mingling::{hook::ProgramHook, prelude::*};
dispatcher!("greet", CMDGreet => EntryGreet);
fn main() {
let mut program = ThisProgram::new();
// --------- IMPORTANT ---------
program.with_hook(
ProgramHook::<ThisProgram>::empty()
.on_begin(|| println!("[DEBUG] Program is begin"))
.on_pre_dispatch(|args| println!("[DEBUG] Pre dispatch: {args:?}"))
.on_post_dispatch(|c: &_| println!("[DEBUG] Post dispatch: {c:?}"))
.on_pre_chain(|c: &_, _| {
println!("[DEBUG] Pre chain: {c}");
})
.on_post_chain(|any_output| println!("[DEBUG] Post chain: {}", any_output.member_id))
.on_finish(|| {
println!("[DEBUG] Loop end");
0 // Override exit code
})
.on_pre_render(|c: &_, _| println!("[DEBUG] Pre render: {c}"))
.on_post_render(|_| println!("[DEBUG] Post render")),
);
// --------- IMPORTANT ---------
program.with_dispatcher(CMDGreet);
program.exec_and_exit();
}
pack!(ResultName = String);
#[chain]
fn handle_greet(args: EntryGreet) -> Next {
let name: ResultName = args
.inner
.first()
.cloned()
.unwrap_or_else(|| "World".to_string())
.into();
name
}
/// Renders the greeting message with the provided name.
#[renderer]
fn render_name(name: ResultName) {
r_println!("Hello, {}!", *name);
}
gen_program!();
|
