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// Copyright 2025, Linaro Limited
// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
// SPDX-License-Identifier: GPL-2.0-or-later
use quote::quote;
use super::*;
macro_rules! derive_compile_fail {
($derive_fn:ident, $input:expr, $error_msg:expr) => {{
let input: proc_macro2::TokenStream = $input;
let error_msg: &str = $error_msg;
let derive_fn: fn(input: syn::DeriveInput) -> Result<proc_macro2::TokenStream, syn::Error> =
$derive_fn;
let input: syn::DeriveInput = syn::parse2(input).unwrap();
let result = derive_fn(input);
let err = result.unwrap_err().into_compile_error();
assert_eq!(
err.to_string(),
quote! { ::core::compile_error! { #error_msg } }.to_string()
);
}};
}
macro_rules! derive_compile {
($derive_fn:ident, $input:expr, $($expected:tt)*) => {{
let input: proc_macro2::TokenStream = $input;
let expected: proc_macro2::TokenStream = $($expected)*;
let derive_fn: fn(input: syn::DeriveInput) -> Result<proc_macro2::TokenStream, syn::Error> =
$derive_fn;
let input: syn::DeriveInput = syn::parse2(input).unwrap();
let result = derive_fn(input).unwrap();
assert_eq!(result.to_string(), expected.to_string());
}};
}
#[test]
fn test_derive_object() {
derive_compile_fail!(
derive_object_or_error,
quote! {
#[derive(Object)]
struct Foo {
_unused: [u8; 0],
}
},
"#[repr(C)] required for #[derive(Object)]"
);
derive_compile!(
derive_object_or_error,
quote! {
#[derive(Object)]
#[repr(C)]
struct Foo {
_unused: [u8; 0],
}
},
quote! {
::qemu_api::assert_field_type!(
Foo,
_unused,
::qemu_api::qom::ParentField<<Foo as ::qemu_api::qom::ObjectImpl>::ParentType>
);
::qemu_api::module_init! {
MODULE_INIT_QOM => unsafe {
::qemu_api::bindings::type_register_static(&<Foo as ::qemu_api::qom::ObjectImpl>::TYPE_INFO);
}
}
}
);
}
#[test]
fn test_derive_tryinto() {
derive_compile_fail!(
derive_tryinto_or_error,
quote! {
#[derive(TryInto)]
struct Foo {
_unused: [u8; 0],
}
},
"#[repr(u8/u16/u32/u64) required for #[derive(TryInto)]"
);
derive_compile!(
derive_tryinto_or_error,
quote! {
#[derive(TryInto)]
#[repr(u8)]
enum Foo {
First = 0,
Second,
}
},
quote! {
impl Foo {
#[allow(dead_code)]
pub const fn into_bits(self) -> u8 {
self as u8
}
#[allow(dead_code)]
pub const fn from_bits(value: u8) -> Self {
match ({
const First: u8 = Foo::First as u8;
const Second: u8 = Foo::Second as u8;
match value {
First => core::result::Result::Ok(Foo::First),
Second => core::result::Result::Ok(Foo::Second),
_ => core::result::Result::Err(value),
}
}) {
Ok(x) => x,
Err(_) => panic!("invalid value for Foo"),
}
}
}
impl core::convert::TryFrom<u8> for Foo {
type Error = u8;
#[allow(ambiguous_associated_items)]
fn try_from(value: u8) -> Result<Self, u8> {
const First: u8 = Foo::First as u8;
const Second: u8 = Foo::Second as u8;
match value {
First => core::result::Result::Ok(Foo::First),
Second => core::result::Result::Ok(Foo::Second),
_ => core::result::Result::Err(value),
}
}
}
}
);
}
|
