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authorBoris Kolpackov <boris@codesynthesis.com>2021-07-23 10:49:37 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2021-07-23 10:49:37 +0200
commit7292c24ba3e4c0016e40466239437fe5819c47de (patch)
treefa066913ee9d5a8aea7d26bfd02ffa691dd4e1a4 /libbuild2
parent4c628d939413bb722a6819d8e3798d79051619ce (diff)
Reserve variable names/components that start with underscore to build2 core
Diffstat (limited to 'libbuild2')
-rw-r--r--libbuild2/parser.cxx30
-rw-r--r--libbuild2/variable.cxx6
-rw-r--r--libbuild2/variable.hxx23
3 files changed, 44 insertions, 15 deletions
diff --git a/libbuild2/parser.cxx b/libbuild2/parser.cxx
index d0661a9..a6f6ae6 100644
--- a/libbuild2/parser.cxx
+++ b/libbuild2/parser.cxx
@@ -4216,8 +4216,34 @@ namespace build2
// Note that the overridability can still be restricted (e.g., by a module
// that enters this variable or by a pattern).
//
- return scope_->var_pool ().insert (
- move (ns[0].value), true /* overridable */);
+ bool ovr (true);
+ auto r (scope_->var_pool ().insert (
+ move (ns[0].value), nullptr, nullptr, &ovr));
+
+ if (!r.second)
+ return r.first;
+
+ // If it's newly entered, verify it's not reserved for the build2 core.
+ // We reserve:
+ //
+ // - Variable components that start with underscore (_x, x._y).
+ //
+ // - Variables in the `build`, `import`, and `export` namespaces.
+ //
+ const string& n (r.first.name);
+
+ const char* w (
+ n[0] == '_' ? "name starts with underscore" :
+ n.find ("._") != string::npos ? "component starts with underscore" :
+ n.compare (0, 6, "build.") == 0 ? "is in 'build' namespace" :
+ n.compare (0, 7, "import.") == 0 ? "is in 'import' namespace" :
+ n.compare (0, 7, "export.") == 0 ? "is in 'export' namespace" : nullptr);
+
+ if (w != nullptr)
+ fail (l) << "variable name '" << n << "' is reserved" <<
+ info << "variable " << w;
+
+ return r.first;
}
void parser::
diff --git a/libbuild2/variable.cxx b/libbuild2/variable.cxx
index 1855f3e..d84945f 100644
--- a/libbuild2/variable.cxx
+++ b/libbuild2/variable.cxx
@@ -1553,7 +1553,7 @@ namespace build2
}
}
- variable& variable_pool::
+ pair<variable&, bool> variable_pool::
insert (string n,
const build2::value_type* t,
const variable_visibility* v,
@@ -1619,7 +1619,7 @@ namespace build2
update (var, pt, pv, po); // Not changing the key.
}
- return var;
+ return pair<variable&, bool> (var, r.second);
}
const variable& variable_pool::
@@ -1631,7 +1631,7 @@ namespace build2
var.type,
&var.visibility,
nullptr /* override */,
- false /* pattern */));
+ false /* pattern */).first);
assert (a.overrides == nullptr);
diff --git a/libbuild2/variable.hxx b/libbuild2/variable.hxx
index 53e393d..c0f0fd9 100644
--- a/libbuild2/variable.hxx
+++ b/libbuild2/variable.hxx
@@ -1222,25 +1222,25 @@ namespace build2
const variable&
insert (string name)
{
- return insert (move (name), nullptr, nullptr, nullptr);
+ return insert (move (name), nullptr, nullptr, nullptr).first;
}
const variable&
insert (string name, variable_visibility v)
{
- return insert (move (name), nullptr, &v, nullptr);
+ return insert (move (name), nullptr, &v, nullptr).first;
}
const variable&
insert (string name, bool overridable)
{
- return insert (move (name), nullptr, nullptr, &overridable);
+ return insert (move (name), nullptr, nullptr, &overridable).first;
}
const variable&
insert (string name, bool overridable, variable_visibility v)
{
- return insert (move (name), nullptr, &v, &overridable);
+ return insert (move (name), nullptr, &v, &overridable). first;
}
template <typename T>
@@ -1248,14 +1248,15 @@ namespace build2
insert (string name)
{
return insert (
- move (name), &value_traits<T>::value_type, nullptr, nullptr);
+ move (name), &value_traits<T>::value_type, nullptr, nullptr).first;
}
template <typename T>
const variable&
insert (string name, variable_visibility v)
{
- return insert (move (name), &value_traits<T>::value_type, &v, nullptr);
+ return insert (
+ move (name), &value_traits<T>::value_type, &v, nullptr).first;
}
template <typename T>
@@ -1263,7 +1264,7 @@ namespace build2
insert (string name, bool overridable)
{
return insert (
- move (name), &value_traits<T>::value_type, nullptr, &overridable);
+ move (name), &value_traits<T>::value_type, nullptr, &overridable).first;
}
template <typename T>
@@ -1271,7 +1272,7 @@ namespace build2
insert (string name, bool overridable, variable_visibility v)
{
return insert (
- move (name), &value_traits<T>::value_type, &v, &overridable);
+ move (name), &value_traits<T>::value_type, &v, &overridable).first;
}
const variable&
@@ -1280,7 +1281,7 @@ namespace build2
bool overridable,
variable_visibility v)
{
- return insert (move (name), type, &v, &overridable);
+ return insert (move (name), type, &v, &overridable).first;
}
// Alias an existing variable with a new name.
@@ -1371,10 +1372,12 @@ namespace build2
friend class scope;
private:
+ friend class parser;
+
// Note that in insert() NULL overridable is interpreted as false unless
// overridden by a pattern while in update() NULL overridable is ignored.
//
- LIBBUILD2_SYMEXPORT variable&
+ LIBBUILD2_SYMEXPORT pair<variable&, bool>
insert (string name,
const value_type*,
const variable_visibility*,