diff options
Diffstat (limited to 'libbuild2/target.hxx')
| -rw-r--r-- | libbuild2/target.hxx | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/libbuild2/target.hxx b/libbuild2/target.hxx index 6b79e1b..2820aa7 100644 --- a/libbuild2/target.hxx +++ b/libbuild2/target.hxx @@ -780,20 +780,43 @@ namespace build2 // public: const target* - is_a (const target_type& tt) const { - return type ().is_a (tt) ? this : nullptr;} + is_a (const target_type& tt) const + { + return type ().is_a (tt) ? this : nullptr; + } template <typename T> T* - is_a () {return dynamic_cast<T*> (this);} + is_a () + { + // At least with GCC we see slightly better and more consistent + // performance with our own type information. + // +#if 0 + return dynamic_cast<T*> (this); +#else + // We can skip dynamically-derived type here (derived_type). + // + return dynamic_type ().is_a<T> () ? static_cast<T*> (this) : nullptr; +#endif + } template <typename T> const T* - is_a () const {return dynamic_cast<const T*> (this);} + is_a () const + { +#if 0 + return dynamic_cast<const T*> (this); +#else + return dynamic_type ().is_a<T> () ? static_cast<const T*> (this) : nullptr; +#endif + } const target* - is_a (const char* n) const { - return type ().is_a (n) ? this : nullptr;} + is_a (const char* n) const + { + return type ().is_a (n) ? this : nullptr; + } // Unchecked cast. // |