42 lines
1.5 KiB
Rust
42 lines
1.5 KiB
Rust
use mappable_rc::Mrc;
|
|
|
|
use crate::{expression::{Expr, Clause}, utils::collect_to_mrc};
|
|
|
|
/// Replaces the first element of a name with the matching prefix from a prefix map
|
|
|
|
/// Produce a Token object for any value of Expr other than Typed.
|
|
/// Called by [#prefix] which handles Typed.
|
|
fn prefix_clause(
|
|
expr: &Clause,
|
|
namespace: Mrc<[String]>
|
|
) -> Clause {
|
|
match expr {
|
|
Clause::S(c, v) => Clause::S(*c,
|
|
collect_to_mrc(v.iter().map(|e| prefix_expr(e, Mrc::clone(&namespace))))
|
|
),
|
|
Clause::Auto(name, typ, body) => Clause::Auto(
|
|
name.clone(),
|
|
collect_to_mrc(typ.iter().map(|e| prefix_expr(e, Mrc::clone(&namespace)))),
|
|
collect_to_mrc(body.iter().map(|e| prefix_expr(e, Mrc::clone(&namespace)))),
|
|
),
|
|
Clause::Lambda(name, typ, body) => Clause::Lambda(
|
|
name.clone(),
|
|
collect_to_mrc(typ.iter().map(|e| prefix_expr(e, Mrc::clone(&namespace)))),
|
|
collect_to_mrc(body.iter().map(|e| prefix_expr(e, Mrc::clone(&namespace)))),
|
|
),
|
|
Clause::Name{local, qualified} => Clause::Name{
|
|
local: local.clone(),
|
|
qualified: collect_to_mrc(namespace.iter().chain(qualified.iter()).cloned())
|
|
},
|
|
x => x.clone()
|
|
}
|
|
}
|
|
|
|
/// Produce an Expr object for any value of Expr
|
|
pub fn prefix_expr(Expr(clause, typ): &Expr, namespace: Mrc<[String]>) -> Expr {
|
|
Expr(
|
|
prefix_clause(clause, Mrc::clone(&namespace)),
|
|
typ.as_ref().map(|e| Mrc::new(prefix_expr(e, namespace)))
|
|
)
|
|
}
|