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-rw-r--r--libbuild2/scope.ixx54
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diff --git a/libbuild2/scope.ixx b/libbuild2/scope.ixx
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+// file : libbuild2/scope.ixx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+namespace build2
+{
+ // scope
+ //
+ inline scope* scope::
+ strong_scope ()
+ {
+ return root_ != nullptr
+ ? root_->strong_ != nullptr ? root_->strong_ : root_
+ : nullptr;
+ }
+
+ inline const scope* scope::
+ strong_scope () const
+ {
+ return root_ != nullptr
+ ? root_->strong_ != nullptr ? root_->strong_ : root_
+ : nullptr;
+ }
+
+ inline scope* scope::
+ weak_scope ()
+ {
+ scope* r (root_);
+ if (r != nullptr)
+ for (; r->parent_->root_ != nullptr; r = r->parent_->root_) ;
+ return r;
+ }
+
+ inline const scope* scope::
+ weak_scope () const
+ {
+ const scope* r (root_);
+ if (r != nullptr)
+ for (; r->parent_->root_ != nullptr; r = r->parent_->root_) ;
+ return r;
+ }
+
+ inline bool scope::
+ sub_root (const scope& r) const
+ {
+ // Scan the parent root scope chain looking for this scope.
+ //
+ for (const scope* pr (&r); (pr = pr->parent_->root_) != nullptr; )
+ if (pr == this)
+ return true;
+
+ return false;
+ }
+}