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use proc_macro2::TokenStream as TokenStream2;
use quote::quote;
use rtic_syntax::{ast::App, Context};
use crate::{
analyze::Analysis,
check::Extra,
codegen::{local_resources_struct, module},
};
type CodegenResult = (
// mod_app_idle -- the `${init}Resources` constructor
Option<TokenStream2>,
// root_init -- items that must be placed in the root of the crate:
// - the `${init}Locals` struct
// - the `${init}Resources` struct
// - the `${init}LateResources` struct
// - the `${init}` module, which contains types like `${init}::Context`
Vec<TokenStream2>,
// user_init -- the `#[init]` function written by the user
TokenStream2,
// call_init -- the call to the user `#[init]`
TokenStream2,
);
/// Generates support code for `#[init]` functions
pub fn codegen(app: &App, analysis: &Analysis, extra: &Extra) -> CodegenResult {
let init = &app.init;
let mut local_needs_lt = false;
let name = &init.name;
let mut root_init = vec![];
let context = &init.context;
let attrs = &init.attrs;
let stmts = &init.stmts;
let shared = &init.user_shared_struct;
let local = &init.user_local_struct;
let shared_resources: Vec<_> = app
.shared_resources
.iter()
.map(|(k, v)| {
let ty = &v.ty;
let cfgs = &v.cfgs;
quote!(
#(#cfgs)*
#k: #ty,
)
})
.collect();
let local_resources: Vec<_> = app
.local_resources
.iter()
.map(|(k, v)| {
let ty = &v.ty;
let cfgs = &v.cfgs;
quote!(
#(#cfgs)*
#k: #ty,
)
})
.collect();
root_init.push(quote! {
struct #shared {
#(#shared_resources)*
}
struct #local {
#(#local_resources)*
}
});
// let locals_pat = locals_pat.iter();
let user_init_return = quote! {#shared, #local, #name::Monotonics};
let user_init = quote!(
#(#attrs)*
#[allow(non_snake_case)]
fn #name(#context: #name::Context) -> (#user_init_return) {
#(#stmts)*
}
);
let mut mod_app = None;
// `${task}Locals`
if !init.args.local_resources.is_empty() {
let (item, constructor) =
local_resources_struct::codegen(Context::Init, &mut local_needs_lt, app);
root_init.push(item);
mod_app = Some(constructor);
}
// let locals_new = locals_new.iter();
let call_init = quote! {
let (shared_resources, local_resources, mut monotonics) = #name(#name::Context::new(core.into()));
};
root_init.push(module::codegen(
Context::Init,
false,
local_needs_lt,
app,
analysis,
extra,
));
(mod_app, root_init, user_init, call_init)
}
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