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hmm my first idea was bad but not too bad

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Pat Hickey
2020-01-22 21:03:24 -08:00
parent c05475b806
commit 7cc0073a3e
1 changed files with 12 additions and 0 deletions
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12
crates/generate/src/errors.rs
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@@ -7,6 +7,18 @@ use witx::{Document, TypeRef};
/// The context struct needs to implement a trait for converting memory and value errors into the /// The context struct needs to implement a trait for converting memory and value errors into the
/// witx doc's error types. /// witx doc's error types.
///
// XXX im rethinking this. maybe each error type should impl
// pub trait WitxErrorType {
// type Context;
// fn is_success(&self) -> bool;
// fn from_memory_error(memory_error: MemoryError, ctx: &mut Context) -> Self;
// fn from_value_error(value_error: GuestValueError, ctx: &mut Context) -> Self;
// }
//
// where Context is mapped to their wasi ctx.
// It seems less "magic" to leave that impl up to the user, and the error message may be simpler?
//
pub fn define_error_trait(names: &Names, doc: &Document) -> TokenStream { pub fn define_error_trait(names: &Names, doc: &Document) -> TokenStream {
// All non-anonymous first return types are used to pass errors. // All non-anonymous first return types are used to pass errors.
let error_typenames = doc let error_typenames = doc