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// file : libbuild2/scope.ixx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
namespace build2
{
// scope
//
inline bool scope::
root () const
{
return root_ == this;
}
inline bool scope::
amalgamatable () const
{
return (root_extra == nullptr ||
!root_extra->amalgamation ||
*root_extra->amalgamation != nullptr);
}
inline scope* scope::
parent_scope ()
{
// If this is a root scope and amalgamation is disabled, "jump" straight
// to the global scope.
//
return root () && !amalgamatable () ? &global_scope () : parent_;
}
inline const scope* scope::
parent_scope () const
{
return root () && !amalgamatable () ? &global_scope () : parent_;
}
inline scope* scope::
root_scope ()
{
return root_;
}
inline const scope* scope::
root_scope () const
{
return root_;
}
inline scope* scope::
strong_scope ()
{
// We naturally assume strong_ is not set for non-amalgamatable projects.
//
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->amalgamatable () && 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->amalgamatable () && 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->amalgamatable () && (pr = pr->parent_->root_) != nullptr; )
{
if (pr == this)
return true;
}
return false;
}
inline target_key scope::
find_target_key (name& n, name& o, const location& loc) const
{
auto p (find_target_type (n, o, loc));
return target_key {
&p.first,
&n.dir,
o.dir.empty () ? &empty_dir_path : &o.dir,
&n.value,
move (p.second)};
}
inline prerequisite_key scope::
find_prerequisite_key (name& n, name& o, const location& loc) const
{
auto p (find_prerequisite_type (n, o, loc));
return prerequisite_key {
n.proj,
{
&p.first,
&n.dir,
o.dir.empty () ? &empty_dir_path : &o.dir,
&n.value,
move (p.second)
},
this};
}
inline dir_path
src_out (const dir_path& out, const scope& r)
{
assert (r.root ());
return src_out (out, r.out_path (), r.src_path ());
}
inline dir_path
out_src (const dir_path& src, const scope& r)
{
assert (r.root ());
return out_src (src, r.out_path (), r.src_path ());
}
inline dir_path
src_out (const dir_path& o,
const dir_path& out_root, const dir_path& src_root)
{
assert (o.sub (out_root));
return src_root / o.leaf (out_root);
}
inline dir_path
out_src (const dir_path& s,
const dir_path& out_root, const dir_path& src_root)
{
assert (s.sub (src_root));
return out_root / s.leaf (src_root);
}
inline const project_name&
project (const scope& rs)
{
auto l (rs[rs.ctx.var_project]);
return l ? cast<project_name> (l) : empty_project_name;
}
inline const project_name&
named_project (const scope& rs)
{
for (auto r (&rs), a (rs.strong_scope ());
;
r = r->parent_scope ()->root_scope ())
{
const project_name& n (project (*r));
if (!n.empty ())
return n;
if (r == a)
break;
}
return empty_project_name;
}
}
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