2467b7139b
* napi procedural macro for basic rust/JavaScript types * introduce the `compat-mode` for `napi` and `napi-derive` crates for backward compatible * remove #[inline] and let compiler to decide the inline behavior * cli now can produce the `.d.ts` file for native binding * many tests and example for the new procedural macro Co-authored-by: LongYinan <lynweklm@gmail.com>
35 lines
1.1 KiB
Rust
35 lines
1.1 KiB
Rust
use std::convert::TryInto;
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use napi::{CallContext, JsExternal, JsNumber, JsObject, Result};
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struct NativeObject {
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count: i32,
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}
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#[js_function(1)]
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pub fn create_external(ctx: CallContext) -> Result<JsExternal> {
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let count = ctx.get::<JsNumber>(0)?.try_into()?;
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let native = NativeObject { count };
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ctx.env.create_external(native, None)
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}
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#[js_function(1)]
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pub fn create_external_with_hint(ctx: CallContext) -> Result<JsExternal> {
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let count = ctx.get::<JsNumber>(0)?.try_into()?;
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let native = NativeObject { count };
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ctx.env.create_external(native, Some(5))
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}
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#[js_function(1)]
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pub fn get_external_count(ctx: CallContext) -> Result<JsNumber> {
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let attached_obj = ctx.get::<JsExternal>(0)?;
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let native_object = ctx.env.get_value_external::<NativeObject>(&attached_obj)?;
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ctx.env.create_int32(native_object.count)
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}
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pub fn register_js(exports: &mut JsObject) -> Result<()> {
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exports.create_named_method("createExternal", create_external)?;
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exports.create_named_method("createExternalWithHint", create_external_with_hint)?;
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exports.create_named_method("getExternalCount", get_external_count)?;
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Ok(())
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}
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