Allow inline enum values to define sizes.

src/compiler/sema_types.c

@@ -39,7 +39,7 @@ bool sema_resolve_array_like_len(SemaContext *context, TypeInfo *type_info, Arra
 	Expr *len_expr = type_info->array.len;
 
 	// Analyse it.
-	if (!sema_analyse_expr(context, len_expr)) return type_info_poison(type_info);
+	if (!sema_analyse_expr_rhs(context, type_isz, len_expr, false, NULL, false)) return type_info_poison(type_info);
 
 	// A constant expression is assumed.
 	if (!sema_cast_const(len_expr))

test/test_suite/arrays/global_array_non_const.c3

@@ -3,7 +3,7 @@ const int CONSTANT = 1;
 int[CONSTANT] a2;
 int[3] a3 = { [CONSTANT] = 1 };
 const bool B = true;
-int[B] c2;      // #error: Expected an integer
+int[B] c2;      // #error: cannot implicitly be converted
 
 int non_constant = 10;
 int[non_constant] b;        // #error: Expected a constant value as

test/test_suite/enumerations/inline_enum_size.c3

@@ -0,0 +1,7 @@
+enum Bar : inline usz
+{
+  FOO,
+  BAR,
+}
+
+int[Bar.BAR] x;