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argument marshaling for unions

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This commit is contained in:
Pat Hickey
2020-02-26 12:37:54 -08:00
committed by Jakub Konka
parent f6a732b6cf
commit 126d7b6825
1 changed files with 21 additions and 22 deletions
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43
crates/generate/src/funcs.rs
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@@ -153,6 +153,25 @@ fn marshal_arg(
}
};
let read_conversion = {
let pointee_type = names.type_ref(tref, anon_lifetime());
let arg_name = names.func_ptr_binding(&param.name);
let name = names.func_param(&param.name);
quote! {
let #name = match memory.ptr::<#pointee_type>(#arg_name as u32) {
Ok(p) => match p.read() {
Ok(r) => r,
Err(e) => {
#error_handling
}
},
Err(e) => {
#error_handling
}
};
}
};
match &*tref.type_() {
witx::Type::Enum(_e) => try_into_conversion,
witx::Type::Flags(_f) => try_into_conversion,
@@ -257,24 +276,7 @@ fn marshal_arg(
};
}
}
witx::Type::Struct(s) if !struct_is_copy(&s) => {
let pointee_type = names.type_ref(tref, anon_lifetime());
let arg_name = names.func_ptr_binding(&param.name);
let name = names.func_param(&param.name);
quote! {
let #name = match memory.ptr::<#pointee_type>(#arg_name as u32) {
Ok(p) => match p.read() {
Ok(r) => r,
Err(e) => {
#error_handling
}
},
Err(e) => {
#error_handling
}
};
}
}
witx::Type::Struct(s) if !struct_is_copy(&s) => read_conversion,
witx::Type::Array(arr) => {
let pointee_type = names.type_ref(arr, anon_lifetime());
let ptr_name = names.func_ptr_binding(&param.name);
@@ -305,10 +307,7 @@ fn marshal_arg(
};
}
}
witx::Type::Union(_u) => {
let name = names.func_param(&param.name);
quote!(let #name = unimplemented!("union argument marshaling");)
}
witx::Type::Union(_u) => read_conversion,
_ => unimplemented!("argument type marshalling"),
}
}