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authorlouiz’ <louiz@louiz.org>2018-03-16 01:11:47 +0100
committerlouiz’ <louiz@louiz.org>2018-03-16 01:13:50 +0100
commitd62ca9f87906be6f046fe9d07afb8bfb69c166e3 (patch)
tree6d2f5f9d60f938b05ddf47bb6b56e51bcd42472f /src/database/update_query.hpp
parentba879a882e031d7b8503f78fe41d1210000c96ca (diff)
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Use if constexpr to make things a lot more readable
Diffstat (limited to 'src/database/update_query.hpp')
-rw-r--r--src/database/update_query.hpp51
1 files changed, 23 insertions, 28 deletions
diff --git a/src/database/update_query.hpp b/src/database/update_query.hpp
index a29ac3f..0ee2bd9 100644
--- a/src/database/update_query.hpp
+++ b/src/database/update_query.hpp
@@ -39,27 +39,25 @@ struct UpdateQuery: public Query
}
template <int N=0, typename... T>
- typename std::enable_if<N < sizeof...(T), void>::type
- insert_col_name_and_value(const std::tuple<T...>& columns)
+ void insert_col_name_and_value(const std::tuple<T...>& columns)
{
- using ColumnType = std::decay_t<decltype(std::get<N>(columns))>;
-
- if (!std::is_same<ColumnType, Id>::value)
+ if constexpr(N < sizeof...(T))
{
- this->body += ColumnType::name + "=$"s + std::to_string(this->current_param);
- this->current_param++;
+ using ColumnType = std::decay_t<decltype(std::get<N>(columns))>;
- if (N < (sizeof...(T) - 1))
- this->body += ", ";
- }
+ if (!std::is_same<ColumnType, Id>::value)
+ {
+ this->body += ColumnType::name + "=$"s
+ + std::to_string(this->current_param);
+ this->current_param++;
- this->insert_col_name_and_value<N+1>(columns);
- }
- template <int N=0, typename... T>
- typename std::enable_if<N == sizeof...(T), void>::type
- insert_col_name_and_value(const std::tuple<T...>&)
- {}
+ if (N < (sizeof...(T) - 1))
+ this->body += ", ";
+ }
+ this->insert_col_name_and_value<N + 1>(columns);
+ }
+ }
template <typename... T>
void execute(DatabaseEngine& db, const std::tuple<T...>& columns)
@@ -76,23 +74,20 @@ struct UpdateQuery: public Query
}
template <int N=0, typename... T>
- typename std::enable_if<N < sizeof...(T), void>::type
- bind_param(const std::tuple<T...>& columns, Statement& statement, int index=1)
+ void bind_param(const std::tuple<T...>& columns, Statement& statement, int index=1)
{
- auto&& column = std::get<N>(columns);
- using ColumnType = std::decay_t<decltype(column)>;
+ if constexpr(N < sizeof...(T))
+ {
+ auto&& column = std::get<N>(columns);
+ using ColumnType = std::decay_t<decltype(column)>;
- if (!std::is_same<ColumnType, Id>::value)
- actual_bind(statement, column.value, index++);
+ if (!std::is_same<ColumnType, Id>::value)
+ actual_bind(statement, column.value, index++);
- this->bind_param<N+1>(columns, statement, index);
+ this->bind_param<N + 1>(columns, statement, index);
+ }
}
- template <int N=0, typename... T>
- typename std::enable_if<N == sizeof...(T), void>::type
- bind_param(const std::tuple<T...>&, Statement&, int)
- {}
-
template <typename... T>
void bind_id(const std::tuple<T...>& columns, Statement& statement)
{