24 lines
745 B
Rust
24 lines
745 B
Rust
use rustc_middle::mir::visit::Visitor;
|
|
use rustc_middle::mir::{Constant, Location};
|
|
use rustc_middle::ty::ConstKind;
|
|
|
|
pub struct RequiredConstsVisitor<'a, 'tcx> {
|
|
required_consts: &'a mut Vec<Constant<'tcx>>,
|
|
}
|
|
|
|
impl<'a, 'tcx> RequiredConstsVisitor<'a, 'tcx> {
|
|
pub fn new(required_consts: &'a mut Vec<Constant<'tcx>>) -> Self {
|
|
RequiredConstsVisitor { required_consts }
|
|
}
|
|
}
|
|
|
|
impl<'a, 'tcx> Visitor<'tcx> for RequiredConstsVisitor<'a, 'tcx> {
|
|
fn visit_constant(&mut self, constant: &Constant<'tcx>, _: Location) {
|
|
if let Some(ct) = constant.literal.const_for_ty() {
|
|
if let ConstKind::Unevaluated(_, _, _) = ct.val {
|
|
self.required_consts.push(*constant);
|
|
}
|
|
}
|
|
}
|
|
}
|