0dc06f7f1a
Pipeline: - main.rs now runs IR lowering and optimization before codegen - IR is built and optimized but output still uses AST-based codegen (IR-based codegen is a future improvement) Coin Cavern example (examples/coin_cavern.ne): - 3-state game: Title → Playing → GameOver - Functions (clamp_x), constants, gravity physics, coin collection - Demonstrates most M2 language features Integration tests (14 total, 7 new): - program_with_functions: functions with params and return values - program_with_while_loop: while loops compile correctly - program_with_fast_slow_vars: placement hints accepted - program_with_multi_state_transitions: 3-state cycle - coin_cavern_compiles: full Coin Cavern example - ir_pipeline_produces_ir: validates IR lowering + optimizer - error_test_recursion_detected: E0402 for recursive functions https://claude.ai/code/session_01W6eQFStA66EuMKHUFo2rx3 |
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|---|---|---|
| .. | ||
| bouncing_ball.ne | ||
| coin_cavern.ne | ||
| hello_sprite.ne | ||
| README.md | ||
NEScript Examples
Quick Start
1. Build the compiler
cargo build --release
2. Compile an example
cargo run -- build examples/hello_sprite.ne
This produces examples/hello_sprite.nes — a valid iNES ROM file.
3. Run in an emulator
Open the .nes file in any NES emulator:
Use the d-pad (arrow keys in most emulators) to move the sprite.
Examples
| File | Description |
|---|---|
hello_sprite.ne |
Move a smiley face with the d-pad |
bouncing_ball.ne |
A sprite that bounces around the screen automatically |
What you'll see
The ROM displays a small 8x8 smiley-face sprite. This is a default tile built
into the compiler's CHR data. In hello_sprite, you control it with the d-pad.
In bouncing_ball, it moves on its own and bounces off the screen edges.
About sprite names
In Milestone 1, the name in draw Smiley at: (x, y) is parsed but not
resolved to a specific tile — all draws use CHR tile 0 (the built-in smiley).
The draw syntax is forward-compatible: when sprite declarations and the
asset pipeline arrive in M3, names like Smiley will reference actual
sprite definitions with custom tile data from PNGs.
Emulator controls
| NES Button | Typical Key |
|---|---|
| D-pad | Arrow keys |
| A | Z |
| B | X |
| Start | Enter |
| Select | Right Shift |
(Exact mappings vary by emulator — check your emulator's input settings.)
Compiler commands
# Compile to ROM
cargo run -- build examples/hello_sprite.ne
# Compile with custom output path
cargo run -- build examples/hello_sprite.ne --output my_game.nes
# Type-check only (no ROM output)
cargo run -- check examples/hello_sprite.ne