From dbeae8da7882ea24ed2002deb3bfa06d50cad985 Mon Sep 17 00:00:00 2001 From: Nicholas Nethercote Date: Fri, 10 May 2024 09:06:47 +1000 Subject: [PATCH] Use fewer origins when creating type variables. `InferCtxt::next_{ty,const}_var*` all take an origin, but the `param_def_id` is almost always `None`. This commit changes them to just take a `Span` and build the origin within the method, and adds new methods for the rare cases where `param_def_id` might not be `None`. This avoids a lot of tedious origin building. Specifically: - next_ty_var{,_id_in_universe,_in_universe}: now take `Span` instead of `TypeVariableOrigin` - next_ty_var_with_origin: added - next_const_var{,_in_universe}: takes Span instead of ConstVariableOrigin - next_const_var_with_origin: added - next_region_var, next_region_var_in_universe: these are unchanged, still take RegionVariableOrigin The API inconsistency (ty/const vs region) seems worth it for the large conciseness improvements. --- clippy_utils/src/ty.rs | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/clippy_utils/src/ty.rs b/clippy_utils/src/ty.rs index 23750ed4d1b..69dd3ba2970 100644 --- a/clippy_utils/src/ty.rs +++ b/clippy_utils/src/ty.rs @@ -10,7 +10,6 @@ use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res}; use rustc_hir::def_id::DefId; use rustc_hir::{Expr, FnDecl, LangItem, TyKind, Unsafety}; -use rustc_infer::infer::type_variable::TypeVariableOrigin; use rustc_infer::infer::TyCtxtInferExt; use rustc_lint::LateContext; use rustc_middle::mir::interpret::Scalar; @@ -276,11 +275,7 @@ pub fn implements_trait_with_env_from_iter<'tcx>( .into_iter() .map(|arg| { arg.into().unwrap_or_else(|| { - let orig = TypeVariableOrigin { - span: DUMMY_SP, - param_def_id: None, - }; - infcx.next_ty_var(orig).into() + infcx.next_ty_var(DUMMY_SP).into() }) }) .collect::>();