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use std::panic::{UnwindSafe, catch_unwind};
use neon_runtime;
use neon_runtime::raw;
use context::Context;
use context::internal::Env;
use result::{NeonResult, Throw};
use types::{Value, Object, Handle, Managed, build};
use types::internal::ValueInternal;
use types::utf8::Utf8;
#[repr(C)]
#[derive(Clone, Copy)]
pub struct JsError(raw::Local);
impl Managed for JsError {
fn to_raw(self) -> raw::Local { self.0 }
fn from_raw(h: raw::Local) -> Self { JsError(h) }
}
impl ValueInternal for JsError {
fn name() -> String { "Error".to_string() }
fn is_typeof<Other: Value>(env: Env, other: Other) -> bool {
unsafe { neon_runtime::tag::is_error(env.to_raw(), other.to_raw()) }
}
}
impl Value for JsError { }
impl Object for JsError { }
impl JsError {
pub fn error<'a, C: Context<'a>, S: AsRef<str>>(cx: &mut C, msg: S) -> NeonResult<Handle<'a, JsError>> {
let msg = cx.string(msg.as_ref());
build(|out| unsafe {
neon_runtime::error::new_error(cx.env().to_raw(), out, msg.to_raw());
true
})
}
pub fn type_error<'a, C: Context<'a>, S: AsRef<str>>(cx: &mut C, msg: S) -> NeonResult<Handle<'a, JsError>> {
let msg = cx.string(msg.as_ref());
build(|out| unsafe {
neon_runtime::error::new_type_error(cx.env().to_raw(), out, msg.to_raw());
true
})
}
pub fn range_error<'a, C: Context<'a>, S: AsRef<str>>(cx: &mut C, msg: S) -> NeonResult<Handle<'a, JsError>> {
let msg = cx.string(msg.as_ref());
build(|out| unsafe {
neon_runtime::error::new_range_error(cx.env().to_raw(), out, msg.to_raw());
true
})
}
}
pub(crate) fn convert_panics<T, F: UnwindSafe + FnOnce() -> NeonResult<T>>(env: Env, f: F) -> NeonResult<T> {
match catch_unwind(|| { f() }) {
Ok(result) => result,
Err(panic) => {
let msg = if let Some(string) = panic.downcast_ref::<String>() {
format!("internal error in Neon module: {}", string)
} else if let Some(str) = panic.downcast_ref::<&str>() {
format!("internal error in Neon module: {}", str)
} else {
"internal error in Neon module".to_string()
};
let (data, len) = Utf8::from(&msg[..]).truncate().lower();
unsafe {
#[cfg(feature = "napi-runtime")]
neon_runtime::error::clear_exception(env.to_raw());
neon_runtime::error::throw_error_from_utf8(env.to_raw(), data, len);
Err(Throw)
}
}
}
}