From: Jakub Dupak <dev@jakubdupak.com>
Date: Fri, 2 Feb 2024 11:11:45 +0000 (+0100)
Subject: gccrs: TyTy: add common SubstitutionRef API
X-Git-Tag: basepoints/gcc-16~7023
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54d8f97ee172d8a7dd434d44fdbfbd1666de8b34;p=thirdparty%2Fgcc.git

gccrs: TyTy: add common SubstitutionRef API

gcc/rust/ChangeLog:

	* typecheck/rust-tyty-subst.cc (SubstitutionRef::get_arg_at):
	Add unified API.

Signed-off-by: Jakub Dupak <dev@jakubdupak.com>
---

diff --git a/gcc/rust/typecheck/rust-tyty-subst.cc b/gcc/rust/typecheck/rust-tyty-subst.cc
index 5a753566d48..71d41d6f796 100644
--- a/gcc/rust/typecheck/rust-tyty-subst.cc
+++ b/gcc/rust/typecheck/rust-tyty-subst.cc
@@ -589,6 +589,17 @@ SubstitutionRef::get_used_arguments () const
   return used_arguments;
 }
 
+tl::optional<SubstitutionArg>
+SubstitutionRef::get_arg_at (size_t i) const
+{
+  auto param_ty = get_substs ().at (i).get_param_ty ();
+  SubstitutionArg arg = SubstitutionArg::error ();
+  get_used_arguments ().get_argument_for_symbol (param_ty, &arg);
+  if (arg.is_error ())
+    return tl::nullopt;
+  return arg;
+}
+
 const RegionConstraints &
 SubstitutionRef::get_region_constraints () const
 {