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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2018-08-22 19:47:53 +0100 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2018-08-22 19:47:53 +0100 |
| commit | b932b50414c806f2fa590a01ccf3cfd94d27165f (patch) | |
| tree | a8fb07a7b3113b1fb79639a034c8cb284f33c138 /libdbpp/selectcommand.h | |
| parent | Workaround Clang warning about evaluation with typeid (diff) | |
| download | libdbpp-b932b50414c806f2fa590a01ccf3cfd94d27165f.tar.bz2 libdbpp-b932b50414c806f2fa590a01ccf3cfd94d27165f.tar.xz libdbpp-b932b50414c806f2fa590a01ccf3cfd94d27165f.zip | |
Structured binding
Replace Row::value method with one that supports structured binding of
field values
Diffstat (limited to 'libdbpp/selectcommand.h')
| -rw-r--r-- | libdbpp/selectcommand.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/libdbpp/selectcommand.h b/libdbpp/selectcommand.h index 0d2a4ca..ee4c9ad 100644 --- a/libdbpp/selectcommand.h +++ b/libdbpp/selectcommand.h @@ -13,6 +13,12 @@ #include <visibility.h> #include <exception.h> +#ifndef BOOST_TEST_MODULE +#define DEPRECATE __attribute__((deprecated)) +#else +#define DEPRECATE +#endif + namespace DB { class Column; class SelectCommand; @@ -38,7 +44,10 @@ namespace DB { /// Get value of column C in current row. template<unsigned int C> - typename std::tuple_element<C, std::tuple<Fn...>>::type value() const; + typename std::tuple_element<C, std::tuple<Fn...>>::type value() const DEPRECATE ; + + template<unsigned int C> + typename std::tuple_element<C, std::tuple<Fn...>>::type get() const; }; template<typename ... Fn> @@ -137,5 +146,14 @@ namespace DB { }; } +namespace std { + template<typename ... Fn> struct tuple_size<DB::Row<Fn...>> { + static constexpr auto value = sizeof...(Fn); + }; + template<size_t C, typename ... Fn> struct tuple_element<C, DB::Row<Fn...>> { + typedef typename std::tuple_element<C, std::tuple<Fn...>>::type type; + }; +} + #endif |