25 lines
491 B
Markdown
25 lines
491 B
Markdown
# napi-derive
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## js_function
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```rust
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#[macro_use]
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extern crate napi_rs_derive;
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use napi_rs::{Result, Value, CallContext, Number};
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use std::convert::TryInto;
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#[js_function(1)]
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fn fibonacci<'env>(ctx: CallContext<'env>) -> Result<Value<'env, Number>> {
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let n = ctx.get::<Number>(0)?.try_into()?;
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ctx.env.create_int64(fibonacci_native(n))
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}
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#[inline]
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fn fibonacci_native(n: i64) -> i64 {
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match n {
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1 | 2 => 1,
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_ => fibonacci_native(n - 1) + fibonacci_native(n - 2)
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}
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}
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```
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