mirror of
https://github.com/bytedream/litbwraw.git
synced 2025-05-08 19:55:13 +02:00
update book to rust edition 2024
This commit is contained in:
parent
3f9f4cd106
commit
9121c75f36
@ -17,8 +17,6 @@ fn main() {
|
||||
|
||||
println!("cargo:rustc-link-arg=-sEXPORTED_RUNTIME_METHODS=['cwrap','ccall']");
|
||||
println!("cargo:rustc-link-arg=-sEXPORT_ES6=1");
|
||||
println!("cargo:rustc-link-arg=-sERROR_ON_UNDEFINED_SYMBOLS=0");
|
||||
println!("cargo:rustc-link-arg=--no-entry");
|
||||
println!(
|
||||
"cargo:rustc-link-arg=-o{}.js",
|
||||
book_output_path
|
||||
|
@ -17,7 +17,6 @@ fn main() {
|
||||
|
||||
println!("cargo:rustc-link-arg=-sEXPORTED_RUNTIME_METHODS=['cwrap','ccall']");
|
||||
println!("cargo:rustc-link-arg=-sEXPORT_ES6=1");
|
||||
println!("cargo:rustc-link-arg=-sERROR_ON_UNDEFINED_SYMBOLS=0");
|
||||
println!("cargo:rustc-link-arg=--no-entry");
|
||||
println!(
|
||||
"cargo:rustc-link-arg=-o{}.js",
|
||||
|
@ -5,8 +5,8 @@ Adding logic on the wasm / Rust side is very much just like writing a (C compati
|
||||
Let's begin simple.
|
||||
This function creates a [Lua](https://docs.rs/mlua/latest/mlua/struct.Lua.html) instance and returns the raw pointer to it.
|
||||
```rust,ignore
|
||||
#[no_mangle]
|
||||
pub extern "C" fn lua_new() -> *mut mlua::Lua {
|
||||
#[unsafe(no_mangle)]
|
||||
pub unsafe extern "C" fn lua_new() -> *mut mlua::Lua {
|
||||
let lua = mlua::Lua::new();
|
||||
Box::into_raw(Box::new(lua))
|
||||
}
|
||||
@ -18,12 +18,12 @@ Now we have a Lua instance, but no way to use it, so let us create one.
|
||||
The function takes the pointer to the Lua struct we create in the `new_lua` function, as well as an arbitrary string, which should be lua code, as parameters.
|
||||
It then executes this string via the Lua instance and may write to `stderr` if an error occurs.
|
||||
```rust,ignore
|
||||
#[no_mangle]
|
||||
#[unsafe(no_mangle)]
|
||||
pub unsafe extern "C" fn lua_execute(lua: *mut mlua::Lua, to_execute: *const std::ffi::c_char) {
|
||||
// casting the raw pointer of the created lua instance back to a usable Rust struct
|
||||
let lua: &mut mlua::Lua = &mut *lua;
|
||||
let lua: &mut mlua::Lua = unsafe { &mut *lua };
|
||||
// converting the c string into a `CStr` (which then can be converted to a `String`)
|
||||
let to_execute = std::ffi::CStr::from_ptr(to_execute);
|
||||
let to_execute = unsafe { std::ffi::CStr::from_ptr(to_execute) };
|
||||
|
||||
// execute the input code via the lua interpreter
|
||||
if let Err(err) = lua.load(&to_execute.to_string_lossy().to_string()).exec() {
|
||||
|
@ -29,7 +29,7 @@ The `vendored` feature is always required for wasm.
|
||||
[package]
|
||||
name = "my-project"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
edition = "2024"
|
||||
|
||||
[dependencies]
|
||||
mlua = { version = ">=0.9.3", features = ["lua51", "vendored"] }
|
||||
@ -48,7 +48,6 @@ mlua = { version = ">=0.9.3", features = ["lua51", "vendored"] }
|
||||
You need to set some additional compiler flags to be able to call your wasm code from Javascript:
|
||||
- `-sEXPORTED_RUNTIME_METHODS=['cwrap','ccall']`: this exports the `cwrap` and `ccall` Javascript functions which allows us to call our library methods
|
||||
- `-sEXPORT_ES6=1`: this makes the created js glue ES6 compatible. It is not mandatory in general but needed as this tutorial/examples utilizes ES6 imports
|
||||
- `-sERROR_ON_UNDEFINED_SYMBOLS=0` (_optional for binary crates_): this ignores undefined symbols. Typically undefined symbols are not really undefined but the linker just can't find them, which is always the case if your crate is a library
|
||||
|
||||
> If your package is a library, you have to add some additional options:
|
||||
> - `--no-entry`: this defines that the compiled wasm has no main function
|
||||
@ -79,7 +78,6 @@ fn main() {
|
||||
> .unwrap()
|
||||
> .join(pkg_name);
|
||||
>
|
||||
> println!("cargo:rustc-link-arg=-sERROR_ON_UNDEFINED_SYMBOLS=0");
|
||||
> println!("cargo:rustc-link-arg=--no-entry");
|
||||
> println!("cargo:rustc-link-arg=-o{}.js", target_path.to_string_lossy());
|
||||
> ```
|
||||
|
Loading…
x
Reference in New Issue
Block a user