octoturge
5705f36c01
Drop reqwest, RPITIT+Send signature, and multi-variant error enum from the teaching example so the only new idea per file is the trait override itself. Real networking stays in adapters/, unaffected.
41 lines
1.8 KiB
Rust
41 lines
1.8 KiB
Rust
//! Run with: cargo run --example printer_polymorphism
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//!
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//! Demonstrates the trait+enum pattern that stands in for inheritance:
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//! - `connect()` is called the same way regardless of vendor (polymorphism),
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//! but each vendor's `impl Printer` runs completely different code
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//! (override).
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//! - `dispatch_gcode()` only exists on `BambuPrinter` (extension) — you
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//! have to `match` the enum back down to the concrete type to reach it,
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//! which is the trade-off for not having implicit downcasting.
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use continuum_proxy::printer::{BambuPrinter, KlipperPrinter, Printer, PrinterHandle, PrusaPrinter};
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#[tokio::main]
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async fn main() {
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let mut fleet: Vec<PrinterHandle> = vec![
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PrinterHandle::Bambu(BambuPrinter::new("p1", "X1 Carbon", "192.168.1.50", "12345678")),
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PrinterHandle::Prusa(PrusaPrinter::new("p2", "MK4", "192.168.1.51", "prusa-api-key")),
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PrinterHandle::Klipper(KlipperPrinter::new("p3", "Voron 2.4", "192.168.1.52")),
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// No host configured — this one will hit the Err path.
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PrinterHandle::Klipper(KlipperPrinter::new("p4", "Broken Voron", "")),
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];
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// Uniform call site: every printer connects the same way from the
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// caller's point of view, even though the three `connect()` bodies
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// are unrelated implementations.
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for printer in &mut fleet {
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match printer.connect().await {
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Ok(()) => println!(" -> connected: {}\n", printer.display_name()),
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Err(err) => println!(" -> failed: {err}\n"),
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}
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}
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// Vendor-only extension: reachable only after matching the concrete
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// variant back out of the enum.
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for printer in &fleet {
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if let PrinterHandle::Bambu(bambu) = printer {
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bambu.dispatch_gcode("part.gcode.3mf");
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}
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}
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}
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