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