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use itertools::Itertools;
use crate::generator::rust::ty::*;
use crate::generator::rust::ExternFuncCollector;
use crate::generator::rust::NO_PARAMS;
use crate::ir::*;
use crate::target::Acc;
use crate::target::Target::*;
use crate::type_rust_generator_struct;
type_rust_generator_struct!(TypeEnumRefGenerator, IrTypeEnumRef);
impl TypeRustGeneratorTrait for TypeEnumRefGenerator<'_> {
fn wire2api_body(&self) -> Acc<Option<String>> {
let enu = self.ir.get(self.context.ir_file);
Acc::new(|target| {
if matches!(target, Common) {
return None;
}
let wasm = target.is_wasm();
let mut variants =
(enu.variants())
.iter()
.enumerate()
.map(|(idx, variant)| match &variant.kind {
IrVariantKind::Value => {
format!("{} => {}::{},", idx, enu.name, variant.name)
}
IrVariantKind::Struct(st) => {
let mut fields = (st.fields).iter().enumerate().map(|(idx, field)| {
let field_name = field.name.rust_style();
let field_ = if st.is_fields_named {
format!("{field_name}: ")
} else {
String::new()
};
if !target.is_wasm() {
format!("{field_} ans.{field_name}.wire2api()")
} else {
format!("{field_} self_.get({}).wire2api()", idx + 1)
}
});
let (left, right) = st.brackets_pair();
if target.is_wasm() {
format!(
"{idx} => {{
{enum_name}::{variant_name}{left}{fields}{right} }},",
enum_name = enu.name,
variant_name = variant.name,
fields = fields.join(",")
)
} else {
format!(
"{idx} => unsafe {{
let ans = support::box_from_leak_ptr(self.kind);
let ans = support::box_from_leak_ptr(ans.{variant_name});
{enum_name}::{variant_name}{left}{fields}{right}
}}",
enum_name = enu.name,
variant_name = variant.name,
fields = fields.join(",")
)
}
}
});
Some(format!(
"{}
match self{} {{
{}
_ => unreachable!(),
}}",
if wasm {
"let self_ = self.unchecked_into::<JsArray>();"
} else {
""
},
if wasm {
"_.get(0).unchecked_into_f64() as _"
} else {
".tag"
},
variants.join("\n"),
))
})
}
fn structs(&self) -> String {
let src = self.ir.get(self.context.ir_file);
if !src.is_struct() {
return "".to_owned();
}
let variant_structs = src
.variants()
.iter()
.map(|variant| {
let fields = match &variant.kind {
IrVariantKind::Value => vec![],
IrVariantKind::Struct(s) => s
.fields
.iter()
.map(|field| {
format!(
"{}: {}{},",
field.name.rust_style(),
field.ty.rust_wire_modifier(Io),
field.ty.rust_wire_type(Io)
)
})
.collect(),
};
format!(
"#[repr(C)]
#[derive(Clone)]
pub struct wire_{}_{} {{ {} }}",
self.ir.name,
variant.name,
fields.join("\n")
)
})
.collect::<Vec<_>>();
let union_fields = src
.variants()
.iter()
.map(|variant| format!("{0}: *mut wire_{1}_{0},", variant.name, self.ir.name))
.collect::<Vec<_>>();
format!(
"#[repr(C)]
#[derive(Clone)]
pub struct {0} {{ tag: i32, kind: *mut {1}Kind }}
#[repr(C)]
pub union {1}Kind {{
{2}
}}
{3}",
self.ir.rust_wire_type(Io),
self.ir.name,
union_fields.join("\n"),
variant_structs.join("\n\n")
)
}
fn static_checks(&self) -> Option<String> {
let src = self.ir.get(self.context.ir_file);
src.wrapper_name.as_ref()?;
let branches: Vec<_> = src
.variants()
.iter()
.map(|variant| match &variant.kind {
IrVariantKind::Value => format!("{}::{} => {{}}", src.name, variant.name),
IrVariantKind::Struct(s) => {
let pattern = s
.fields
.iter()
.map(|field| field.name.rust_style().to_owned())
.collect::<Vec<_>>();
let pattern = if s.is_fields_named {
format!("{}::{} {{ {} }}", src.name, variant.name, pattern.join(","))
} else {
format!("{}::{}({})", src.name, variant.name, pattern.join(","))
};
let checks = s
.fields
.iter()
.map(|field| {
format!(
"let _: {} = {};\n",
field.ty.rust_api_type(),
field.name.rust_style(),
)
})
.collect::<Vec<_>>();
format!("{} => {{ {} }}", pattern, checks.join(""))
}
})
.collect();
Some(format!(
"match None::<{}>.unwrap() {{ {} }}",
src.name,
branches.join(","),
))
}
fn wrapper_struct(&self) -> Option<String> {
let src = self.ir.get(self.context.ir_file);
src.wrapper_name.as_ref().cloned()
}
fn self_access(&self, obj: String) -> String {
let src = self.ir.get(self.context.ir_file);
match &src.wrapper_name {
Some(_) => format!("{}.0", obj),
None => obj,
}
}
fn wrap_obj(&self, obj: String, _wired_fallible_func: bool) -> String {
match self.wrapper_struct() {
Some(wrapper) => format!("{}({})", wrapper, obj),
None => obj,
}
}
fn impl_intodart(&self) -> String {
let src = self.ir.get(self.context.ir_file);
let (name, self_path): (&str, &str) = match &src.wrapper_name {
Some(wrapper) => (wrapper, &src.name),
None => (&src.name, "Self"),
};
let self_ref = self.self_access("self".to_owned());
let variants = src
.variants()
.iter()
.enumerate()
.map(|(idx, variant)| {
let tag = format!("{}.into_dart()", idx);
match &variant.kind {
IrVariantKind::Value => {
format!("{}::{} => vec![{}],", self_path, variant.name, tag)
}
IrVariantKind::Struct(st) => {
let fields = Some(tag)
.into_iter()
.chain(st.fields.iter().map(|field| {
let gen = TypeRustGenerator::new(
field.ty.clone(),
self.context.ir_file,
self.context.config,
);
gen.convert_to_dart(field.name.rust_style().to_owned())
}))
.collect::<Vec<_>>();
let pattern = st
.fields
.iter()
.map(|field| field.name.rust_style().to_owned())
.collect::<Vec<_>>();
let (left, right) = st.brackets_pair();
format!(
"{}::{}{}{}{} => vec![{}],",
self_path,
variant.name,
left,
pattern.join(","),
right,
fields.join(",")
)
}
}
})
.collect::<Vec<_>>();
format!(
"impl support::IntoDart for {} {{
fn into_dart(self) -> support::DartAbi {{
match {} {{
{}
}}.into_dart()
}}
}}
impl support::IntoDartExceptPrimitive for {0} {{}}",
name,
self_ref,
variants.join("\n")
)
}
fn new_with_nullptr(&self, collector: &mut ExternFuncCollector) -> String {
fn init_of(ty: &IrType) -> String {
if ty.rust_wire_is_pointer(Io) {
"core::ptr::null_mut()".to_owned()
} else if ty.is_rust_opaque() || ty.is_dart_opaque() {
format!("{}::new_with_null_ptr()", ty.rust_wire_type(Io))
} else {
"Default::default()".to_owned()
}
}
let src = self.ir.get(self.context.ir_file);
let inflators = src
.variants()
.iter()
.filter_map(|variant| {
let typ = format!("{}_{}", self.ir.name, variant.name);
let body: Vec<_> = if let IrVariantKind::Struct(st) = &variant.kind {
st.fields
.iter()
.map(|field| format!("{}: {}", field.name.rust_style(), init_of(&field.ty)))
.collect()
} else {
return None;
};
Some(collector.generate(
&format!("inflate_{}", typ),
NO_PARAMS,
Some(&format!("*mut {}Kind", self.ir.name)),
&format!(
"support::new_leak_box_ptr({}Kind {{
{}: support::new_leak_box_ptr({} {{
{}
}})
}})",
self.ir.name,
variant.name.rust_style(),
format_args!("wire_{}", typ),
body.join(",")
),
Io,
))
})
.collect::<Vec<_>>();
format!(
"impl NewWithNullPtr for {} {{
fn new_with_null_ptr() -> Self {{
Self {{
tag: -1,
kind: core::ptr::null_mut(),
}}
}}
}}
{}",
self.ir.rust_wire_type(Io),
inflators.join("\n\n")
)
}
fn imports(&self) -> Option<String> {
let api_enum = self.ir.get(self.context.ir_file);
Some(format!("use {};", api_enum.path.join("::")))
}
}