gccrs: [E0034] found more than one items for method

Multiple items found with same prototype.
Fixes: Rust-GCC#2366

gcc/rust/ChangeLog:

	* typecheck/rust-hir-path-probe.h:
	Fixes issue & added rich location message.
	* typecheck/rust-hir-type-check-expr.cc (TypeCheckExpr::visit):
	Added rich location and error code.

gcc/testsuite/ChangeLog:

	* rust/compile/generics6.rs: Updated dejagnu comment.
	* rust/compile/generics7.rs: likewise.
	* rust/compile/issue-925.rs: likewise.

Signed-off-by: Muhammad Mahad <mahadtxt@gmail.com>

gcc/rust/typecheck/rust-hir-path-probe.h

@@ -165,8 +165,11 @@ class ReportMultipleCandidateError : private TypeCheckBase
     for (auto &c : candidates)
       r.add_range (c.locus);
 
+    std::string rich_msg = "multiple " + query.as_string () + " found";
+    r.add_fixit_replace (rich_msg.c_str ());
+
     rust_error_at (r, ErrorCode::E0034,
-		   "multiple applicable items in scope for: %s",
+		   "multiple applicable items in scope for: %qs",
 		   query.as_string ().c_str ());
   }
 };

gcc/rust/typecheck/rust-hir-type-check-expr.cc

@@ -1065,11 +1065,18 @@ TypeCheckExpr::visit (HIR::MethodCallExpr &expr)
   if (candidates.size () > 1)
     {
       rich_location r (line_table, expr.get_method_name ().get_locus ());
+      std::string rich_msg
+	= "multiple " + expr.get_method_name ().get_segment ().as_string ()
+	  + " found";
+
       for (auto &c : candidates)
 	r.add_range (c.candidate.locus);
 
+      r.add_fixit_replace (rich_msg.c_str ());
+
       rust_error_at (
-	r, "multiple candidates found for method %<%s%>",
+	r, ErrorCode::E0034,
+	"multiple applicable items in scope for method %qs",
 	expr.get_method_name ().get_segment ().as_string ().c_str ());
       return;
     }

gcc/testsuite/rust/compile/generics6.rs

@@ -26,7 +26,7 @@ impl Foo<f32> {
 }
 
 fn main() {
-    let a: i32 = Foo::test(); // { dg-error "multiple applicable items in scope for: test" }
+    let a: i32 = Foo::test(); // { dg-error "multiple applicable items in scope for: .test." }
     // { dg-error {Failed to resolve expression of function call} "" { target *-*-* } .-1 }
 }
 

gcc/testsuite/rust/compile/generics7.rs

@@ -26,5 +26,5 @@ impl<T> Foo<T> {
 fn main() {
     let a = Foo { a: 123 };
     a.bar();
-    // { dg-error "multiple candidates found for method .bar." "" { target *-*-* } .-1 }
+    // { dg-error "multiple applicable items in scope for method .bar." "" { target *-*-* } .-1 }
 }

gcc/testsuite/rust/compile/issue-925.rs

@@ -21,5 +21,5 @@ impl B for S {
 fn test() {
     let a = S;
     a.foo();
-    // { dg-error "multiple candidates found for method .foo." "" { target *-*-* } .-1 }
+    // { dg-error "multiple applicable items in scope for method .foo." "" { target *-*-* } .-1 }
 }