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use std::{
borrow::Borrow,
fmt::{Display, Result},
sync::Arc,
};
use crate::rust_ir::*;
use chalk_ir::{interner::Interner, *};
use itertools::Itertools;
use crate::{logging_db::RecordedItemId, split::Split, RustIrDatabase};
#[macro_use]
mod utils;
mod bounds;
mod identifiers;
mod items;
mod render_trait;
mod state;
mod stub;
mod ty;
use self::render_trait::*;
pub use self::state::*;
pub use self::utils::sanitize_debug_name;
use self::utils::as_display;
fn write_item<F, I, T>(f: &mut F, ws: &InternalWriterState<'_, I>, v: &T) -> Result
where
F: std::fmt::Write + ?Sized,
I: Interner,
T: RenderAsRust<I>,
{
writeln!(f, "{}", v.display(ws))
}
pub fn write_stub_items<F, I, DB, P, T>(f: &mut F, ws: &WriterState<I, DB, P>, ids: T) -> Result
where
F: std::fmt::Write + ?Sized,
I: Interner,
DB: RustIrDatabase<I>,
P: Borrow<DB>,
T: IntoIterator<Item = RecordedItemId<I>>,
{
let wrapped_db = &ws.wrap_db_ref(|db| stub::StubWrapper::new(db.borrow()));
write_items(f, wrapped_db, ids)
}
pub fn write_items<F, I, DB, P, T>(f: &mut F, ws: &WriterState<I, DB, P>, ids: T) -> Result
where
F: std::fmt::Write + ?Sized,
I: Interner,
DB: RustIrDatabase<I>,
P: Borrow<DB>,
T: IntoIterator<Item = RecordedItemId<I>>,
{
for id in ids {
match id {
RecordedItemId::Impl(id) => {
let v = ws.db().impl_datum(id);
write_item(f, &InternalWriterState::new(ws), &*v)?;
}
RecordedItemId::Adt(id) => {
let v = ws.db().adt_datum(id);
write_item(f, &InternalWriterState::new(ws), &*v)?;
}
RecordedItemId::Trait(id) => {
let v = ws.db().trait_datum(id);
write_item(f, &InternalWriterState::new(ws), &*v)?;
}
RecordedItemId::OpaqueTy(id) => {
let v = ws.db().opaque_ty_data(id);
write_item(f, &InternalWriterState::new(ws), &*v)?;
}
RecordedItemId::FnDef(id) => {
let v = ws.db().fn_def_datum(id);
write_item(f, &InternalWriterState::new(ws), &*v)?;
}
RecordedItemId::Generator(id) => {
let generator = ws.db().generator_datum(id);
let witness = ws.db().generator_witness_datum(id);
write_item(f, &InternalWriterState::new(ws), &(&*generator, &*witness))?;
}
}
}
Ok(())
}
fn display_self_where_clauses_as_bounds<'a, I: Interner>(
s: &'a InternalWriterState<'a, I>,
bounds: &'a [QuantifiedWhereClause<I>],
) -> impl Display + 'a {
as_display(move |f| {
let interner = s.db().interner();
write!(
f,
"{}",
bounds
.iter()
.map(|bound| {
as_display(|f| {
let s = &s.add_debrujin_index(None);
if !bound.binders.is_empty(interner) {
write!(
f,
"forall<{}> ",
s.binder_var_display(&bound.binders)
.collect::<Vec<_>>()
.join(", ")
)?;
}
match &bound.skip_binders() {
WhereClause::Implemented(trait_ref) => display_type_with_generics(
s,
trait_ref.trait_id,
&trait_ref.substitution.as_slice(interner)[1..],
)
.fmt(f),
WhereClause::AliasEq(alias_eq) => match &alias_eq.alias {
AliasTy::Projection(projection_ty) => {
let (assoc_ty_datum, trait_params, assoc_type_params) =
s.db().split_projection(&projection_ty);
display_trait_with_assoc_ty_value(
s,
assoc_ty_datum,
&trait_params[1..],
assoc_type_params,
&alias_eq.ty,
)
.fmt(f)
}
AliasTy::Opaque(opaque) => opaque.display(s).fmt(f),
},
WhereClause::LifetimeOutlives(lifetime) => lifetime.display(s).fmt(f),
WhereClause::TypeOutlives(ty) => ty.display(s).fmt(f),
}
})
.to_string()
})
.format(" + ")
)
})
}
fn display_type_with_generics<'a, I: Interner>(
s: &'a InternalWriterState<'a, I>,
trait_name: impl RenderAsRust<I> + 'a,
trait_params: impl IntoIterator<Item = &'a GenericArg<I>> + 'a,
) -> impl Display + 'a {
use std::fmt::Write;
let trait_params = trait_params.into_iter().map(|param| param.display(s));
let mut trait_params_str = String::new();
write_joined_non_empty_list!(trait_params_str, "<{}>", trait_params, ", ").unwrap();
as_display(move |f| write!(f, "{}{}", trait_name.display(s), trait_params_str))
}
fn display_trait_with_assoc_ty_value<'a, I: Interner>(
s: &'a InternalWriterState<'a, I>,
assoc_ty_datum: Arc<AssociatedTyDatum<I>>,
trait_params: &'a [GenericArg<I>],
assoc_ty_params: &'a [GenericArg<I>],
assoc_ty_value: &'a Ty<I>,
) -> impl Display + 'a {
as_display(move |f| {
write!(f, "{}<", assoc_ty_datum.trait_id.display(s))?;
write_joined_non_empty_list!(
f,
"{}, ",
trait_params.iter().map(|param| param.display(s)),
", "
)?;
write!(f, "{}", assoc_ty_datum.id.display(s))?;
write_joined_non_empty_list!(
f,
"<{}>",
assoc_ty_params.iter().map(|param| param.display(s)),
", "
)?;
write!(f, "={}>", assoc_ty_value.display(s))?;
Ok(())
})
}