[gcc r14-7989] gccrs: resolver: Refactor assertion

[Arthur Cohen <cohenarthur@gcc.gnu.org>]

https://gcc.gnu.org/g:342b071a0fac00d8acf745348c41afcd48cdb4cb

commit r14-7989-g342b071a0fac00d8acf745348c41afcd48cdb4cb
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Mon Aug 28 10:54:12 2023 +0200

    gccrs: resolver: Refactor assertion
    
    Change the condition with rust_unreachable to an assertion. This will
    keep the code clean and concise.
    Some styling issues appeared during review, this commit make the code
    more readable.
    
    gcc/rust/ChangeLog:
    
            * resolve/rust-toplevel-name-resolver-2.0.cc (TopLevel::visit):
            Change to assertion.
            * util/rust-hir-map.cc (Mappings::lookup_derive_proc_macros):
            Add empty line.
            (Mappings::lookup_bang_proc_macros): Likewise.
            (Mappings::lookup_attribute_proc_macros): Likewise.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/resolve/rust-toplevel-name-resolver-2.0.cc | 5 ++---
 gcc/rust/util/rust-hir-map.cc                       | 3 +++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/gcc/rust/resolve/rust-toplevel-name-resolver-2.0.cc b/gcc/rust/resolve/rust-toplevel-name-resolver-2.0.cc
index 61252988673..a09c738267e 100644
--- a/gcc/rust/resolve/rust-toplevel-name-resolver-2.0.cc
+++ b/gcc/rust/resolve/rust-toplevel-name-resolver-2.0.cc
@@ -75,9 +75,8 @@ void
 TopLevel::visit (AST::ExternCrate &crate)
 {
   CrateNum num;
-  if (!Analysis::Mappings::get ()->lookup_crate_name (
-	crate.get_referenced_crate (), num))
-    rust_unreachable ();
+  rust_assert (Analysis::Mappings::get ()->lookup_crate_name (
+    crate.get_referenced_crate (), num));
 
   auto attribute_macros
     = Analysis::Mappings::get ()->lookup_attribute_proc_macros (num);
diff --git a/gcc/rust/util/rust-hir-map.cc b/gcc/rust/util/rust-hir-map.cc
index 8ac957fd87d..7041aaa9945 100644
--- a/gcc/rust/util/rust-hir-map.cc
+++ b/gcc/rust/util/rust-hir-map.cc
@@ -978,6 +978,7 @@ Mappings::lookup_derive_proc_macros (CrateNum num)
   auto it = procmacrosDeriveMappings.find (num);
   if (it == procmacrosDeriveMappings.end ())
     return tl::nullopt;
+
   return it->second;
 }
 
@@ -987,6 +988,7 @@ Mappings::lookup_bang_proc_macros (CrateNum num)
   auto it = procmacrosBangMappings.find (num);
   if (it == procmacrosBangMappings.end ())
     return tl::nullopt;
+
   return it->second;
 }
 
@@ -996,6 +998,7 @@ Mappings::lookup_attribute_proc_macros (CrateNum num)
   auto it = procmacrosAttributeMappings.find (num);
   if (it == procmacrosAttributeMappings.end ())
     return tl::nullopt;
+
   return it->second;
 }