diff options
Diffstat (limited to 'build2/variable')
| -rw-r--r-- | build2/variable | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/build2/variable b/build2/variable index 6bdc728..ab5586d 100644 --- a/build2/variable +++ b/build2/variable @@ -165,11 +165,18 @@ namespace build2 ~value () {*this = nullptr;} explicit - value (const value_type* t = nullptr): type (t), null (true), extra (0) {} + value (nullptr_t = nullptr): type (nullptr), null (true), extra (0) {} + + explicit + value (const value_type* t): type (t), null (true), extra (0) {} explicit value (names&&); // Create untyped value. + template <typename T> + explicit + value (T); // Create value of value_traits<T>::value_type type. + // Note: preserves type. // value& @@ -257,10 +264,12 @@ namespace build2 // Value cast. The first three expect the value to be not NULL. The cast // from lookup expects the value to aslo be defined. // + // Note that a cast to names expects the value to be untyped while a cast + // to vector<names> -- typed. + // // Why are these non-members? The cast is easier on the eyes and is also // consistent with the cast operators. The other two are for symmetry. // - // template <typename T> T& cast (value&); template <typename T> T&& cast (value&&); template <typename T> const T& cast (const value&); |