From 26af9268e98ed4c82c83b8f6e3f94af71b109eba Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Wed, 9 Dec 2020 21:23:38 +0300
Subject: Fix set pseudo-builtin to reset special variables when required

---
 libbuild2/test/script/script.hxx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'libbuild2/test/script/script.hxx')

diff --git a/libbuild2/test/script/script.hxx b/libbuild2/test/script/script.hxx
index d387a11..53e4329 100644
--- a/libbuild2/test/script/script.hxx
+++ b/libbuild2/test/script/script.hxx
@@ -303,12 +303,27 @@ namespace build2
         variable_pool var_pool;
         mutable shared_mutex var_pool_mutex;
 
+        // Used to compose a test command.
+        //
+        // Changing any of their values requires resetting the $* and $N
+        // special aliases.
+        //
         const variable& test_var;      // test
         const variable& options_var;   // test.options
         const variable& arguments_var; // test.arguments
         const variable& redirects_var; // test.redirects
         const variable& cleanups_var;  // test.cleanups
 
+        bool
+        test_command_var (const string& name) const
+        {
+          return name == test_var.name      ||
+                 name == options_var.name   ||
+                 name == arguments_var.name ||
+                 name == redirects_var.name ||
+                 name == cleanups_var.name;
+        }
+
         const variable& wd_var;       // $~
         const variable& id_var;       // $@
         const variable& cmd_var;      // $*
-- 
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