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Merge pull request #1470 from bytecodealliance/pch/wiggle_error_model

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Wiggle: changes to traits used for error conversion and reporting
This commit is contained in:
Pat Hickey
2020-04-06 19:46:00 -07:00
committed by GitHub
parent 9de0ab302c 1b3ea0281b
commit 71923c805a
23 changed files with 111 additions and 105 deletions
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14
crates/wiggle/generate/src/lib.rs
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@@ -8,6 +8,8 @@ mod types;
use proc_macro2::TokenStream;
use quote::quote;
use lifetimes::anon_lifetime;
pub use config::Config;
pub use funcs::define_func;
pub use module_trait::define_module_trait;
@@ -21,6 +23,17 @@ pub fn generate(doc: &witx::Document, config: &Config) -> TokenStream {
let types = doc.typenames().map(|t| define_datatype(&names, &t));
let guest_error_methods = doc.error_types().map(|t| {
let typename = names.type_ref(&t, anon_lifetime());
let err_method = names.guest_error_conversion_method(&t);
quote!(fn #err_method(&self, e: wiggle::GuestError) -> #typename;)
});
let guest_error_conversion = quote! {
pub trait GuestErrorConversion {
#(#guest_error_methods)*
}
};
let modules = doc.modules().map(|module| {
let modname = names.module(&module.name);
let trait_name = names.trait_name(&module.name);
@@ -57,6 +70,7 @@ pub fn generate(doc: &witx::Document, config: &Config) -> TokenStream {
quote!(
pub mod types {
#(#types)*
#guest_error_conversion
}
#(#modules)*
#metadata