Remove SystemBuilder structs, refactor trait into BuildableSystem

Co-authored-by: Ava Silver <ava@avasilver.dev>

src/main.rs

@@ -4,10 +4,10 @@ use libnoentiendo::{
   platform::{SyncPlatform, TextPlatform, WinitPlatform},
   roms::DiskLoadable,
   systems::{
-    basic::BasicSystemBuilder, c64::C64SystemBuilder, c64::C64SystemConfig, c64::C64SystemRoms,
-    easy::Easy6502SystemBuilder, klaus::KlausSystemBuilder, pet::PetSystemBuilder,
-    pet::PetSystemConfig, pet::PetSystemRoms, vic::Vic20SystemBuilder, vic::Vic20SystemConfig,
-    vic::Vic20SystemRoms, SystemBuilder,
+    basic::BasicSystem, c64::C64System, c64::C64SystemConfig, c64::C64SystemRoms,
+    easy::Easy6502System, klaus::KlausSystem, pet::PetSystem, pet::PetSystemConfig,
+    pet::PetSystemRoms, vic::Vic20System, vic::Vic20SystemConfig, vic::Vic20SystemRoms,
+    BuildableSystem,
   },
 };
 
@@ -75,30 +75,30 @@ fn main() {
   };
 
   let system = match args.system {
-    SystemArg::Basic => BasicSystemBuilder::build(romfile.unwrap(), (), platform.provider()),
-    SystemArg::Easy => Easy6502SystemBuilder::build(romfile.unwrap(), (), platform.provider()),
-    SystemArg::Klaus => KlausSystemBuilder::build(
+    SystemArg::Basic => BasicSystem::build(romfile.unwrap(), (), platform.provider()),
+    SystemArg::Easy => Easy6502System::build(romfile.unwrap(), (), platform.provider()),
+    SystemArg::Klaus => KlausSystem::build(
       romfile.unwrap(),
       KlausSystemConfig {
         pc_report: None,
         variant: Mos6502Variant::NMOS,
       },
       platform.provider(),
     ),
-    SystemArg::Pet => PetSystemBuilder::build(
+    SystemArg::Pet => PetSystem::build(
       PetSystemRoms::from_disk(),
       PetSystemConfig { mapping },
       platform.provider(),
     ),
-    SystemArg::Vic => Vic20SystemBuilder::build(
+    SystemArg::Vic => Vic20System::build(
       Vic20SystemRoms::from_disk(match romfile {
         Some(_) => Some(args.rom_path.as_str()),
         None => None,
       }),
       Vic20SystemConfig { mapping },
       platform.provider(),
     ),
-    SystemArg::C64 => C64SystemBuilder::build(
+    SystemArg::C64 => C64System::build(
       C64SystemRoms::from_disk(),
       C64SystemConfig { mapping },
       platform.provider(),

src/systems/basic.rs

@@ -8,7 +8,7 @@ use crate::memory::{ActiveInterrupt, Memory};
 use crate::memory::{BlockMemory, BranchMemory};
 use crate::platform::{PlatformProvider, WindowConfig};
 use crate::roms::RomFile;
-use crate::systems::{System, SystemBuilder};
+use crate::systems::{BuildableSystem, System};
 use std::io::Write;
 use std::sync::Arc;
 
@@ -68,10 +68,7 @@ impl Memory for MappedStdIO {
   }
 }
 
-/// A factory for creating a BasicSystem.
-pub struct BasicSystemBuilder;
-
-impl SystemBuilder<BasicSystem, RomFile, ()> for BasicSystemBuilder {
+impl BuildableSystem<RomFile, ()> for BasicSystem {
   fn build(rom: RomFile, _config: (), platform: Arc<dyn PlatformProvider>) -> Box<dyn System> {
     let ram = BlockMemory::ram(0x4000);
     let io = MappedStdIO::new(platform);

src/systems/c64/mod.rs

@@ -30,7 +30,7 @@ use self::{
   vic_ii::{VicIIChip, VicIIChipIO},
 };
 
-use super::SystemBuilder;
+use super::BuildableSystem;
 
 /// Port A on the first CIA chip on the C64 deals with setting the keyboard row being scanned.
 struct C64Cia1PortA {
@@ -204,10 +204,7 @@ pub struct C64SystemConfig {
   pub mapping: KeyMappingStrategy,
 }
 
-/// A factory for creating a Commodore 64 system.
-pub struct C64SystemBuilder;
-
-impl SystemBuilder<C64System, C64SystemRoms, C64SystemConfig> for C64SystemBuilder {
+impl BuildableSystem<C64SystemRoms, C64SystemConfig> for C64System {
   fn build(
     roms: C64SystemRoms,
     config: C64SystemConfig,

src/systems/easy.rs

@@ -8,7 +8,7 @@ use crate::keyboard::KeyPosition;
 use crate::memory::{ActiveInterrupt, BlockMemory, BranchMemory, Memory};
 use crate::platform::{Color, PlatformProvider, WindowConfig};
 use crate::roms::RomFile;
-use crate::systems::{System, SystemBuilder};
+use crate::systems::{BuildableSystem, System};
 use std::sync::Arc;
 
 const WIDTH: u32 = 32;
@@ -61,9 +61,7 @@ impl Memory for EasyIO {
 }
 
 /// A factory for the Easy6502 system.
-pub struct Easy6502SystemBuilder;
-
-impl SystemBuilder<Easy6502System, RomFile, ()> for Easy6502SystemBuilder {
+impl BuildableSystem<RomFile, ()> for Easy6502System {
   fn build(rom: RomFile, _config: (), platform: Arc<dyn PlatformProvider>) -> Box<dyn System> {
     platform.request_window(WindowConfig::new(WIDTH, WIDTH, SCALE as f64));
 

src/systems/klaus.rs

@@ -12,17 +12,15 @@ use std::cell::Cell;
 use std::rc::Rc;
 use std::sync::Arc;
 
-use super::SystemBuilder;
+use super::BuildableSystem;
 
 pub struct KlausSystemConfig {
   pub pc_report: Option<Rc<Cell<u16>>>,
   pub variant: Mos6502Variant,
 }
 
 /// A factory for creating a system that runs Klaus Dormann's 6502 CPU test suite.
-pub struct KlausSystemBuilder;
-
-impl SystemBuilder<KlausSystem, RomFile, KlausSystemConfig> for KlausSystemBuilder {
+impl BuildableSystem<RomFile, KlausSystemConfig> for KlausSystem {
   fn build(
     rom: RomFile,
     config: KlausSystemConfig,
@@ -77,7 +75,7 @@ mod tests {
     let platform = TextPlatform::new();
     let pc = Rc::new(Cell::new(0));
 
-    let mut system = KlausSystemBuilder::build(
+    let mut system = KlausSystem::build(
       roms,
       KlausSystemConfig {
         pc_report: Some(pc.clone()),
@@ -99,7 +97,7 @@ mod tests {
     let platform = TextPlatform::new();
     let pc = Rc::new(Cell::new(0));
 
-    let mut system = KlausSystemBuilder::build(
+    let mut system = KlausSystem::build(
       roms,
       KlausSystemConfig {
         pc_report: Some(pc.clone()),

src/systems/mod.rs

@@ -9,8 +9,8 @@ pub mod klaus;
 pub mod pet;
 pub mod vic;
 
-pub trait SystemBuilder<SystemType, RomRegistry, SystemConfig> {
-  /// Create a new system from the given roms, configuration, and with I/O provided by the given
+pub trait BuildableSystem<RomRegistry, SystemConfig> {
+  /// Instantiate this system from the given roms, configuration, and with I/O provided by the given
   /// platform provider.
   fn build(
     roms: RomRegistry,

src/systems/pet/mod.rs

@@ -6,7 +6,7 @@ use crate::keyboard::{KeyAdapter, KeyMappingStrategy, SymbolAdapter};
 use crate::memory::mos652x::{Pia, Via};
 use crate::memory::{BlockMemory, BranchMemory, NullMemory, NullPort, Port};
 use crate::platform::{Color, PlatformProvider, WindowConfig};
-use crate::systems::{System, SystemBuilder};
+use crate::systems::{BuildableSystem, System};
 use instant::Instant;
 use std::cell::Cell;
 use std::rc::Rc;
@@ -151,10 +151,7 @@ pub struct PetSystemConfig {
   pub mapping: KeyMappingStrategy,
 }
 
-/// A factory for the Commodore PET.
-pub struct PetSystemBuilder;
-
-impl SystemBuilder<PetSystem, PetSystemRoms, PetSystemConfig> for PetSystemBuilder {
+impl BuildableSystem<PetSystemRoms, PetSystemConfig> for PetSystem {
   fn build(
     roms: PetSystemRoms,
     config: PetSystemConfig,

src/systems/vic/mod.rs

@@ -34,7 +34,7 @@ use wasm_bindgen::JsCast;
 #[cfg(target_arch = "wasm32")]
 use js_sys::Uint8Array;
 
-use super::SystemBuilder;
+use super::BuildableSystem;
 
 /// The set of ROM files required to run a VIC-20 system.
 pub struct Vic20SystemRoms {
@@ -249,10 +249,7 @@ pub struct Vic20SystemConfig {
   pub mapping: KeyMappingStrategy,
 }
 
-/// A factory for creating a VIC-20 system.
-pub struct Vic20SystemBuilder;
-
-impl SystemBuilder<Vic20System, Vic20SystemRoms, Vic20SystemConfig> for Vic20SystemBuilder {
+impl BuildableSystem<Vic20SystemRoms, Vic20SystemConfig> for Vic20System {
   fn build(
     roms: Vic20SystemRoms,
     config: Vic20SystemConfig,