tmp/tmpph2hvbwu/{from.md → to.md}
RENAMED
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@@ -45,5 +45,43 @@ wrapper [[term.perfect.forwarding.call.wrapper]] `g` with call pattern:
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invocation.
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*Throws:* Any exception thrown by the initialization of the state
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entities of `g` [[func.def]].
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invocation.
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*Throws:* Any exception thrown by the initialization of the state
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entities of `g` [[func.def]].
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``` cpp
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template<auto f, class... Args>
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constexpr unspecified bind_front(Args&&... args);
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template<auto f, class... Args>
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constexpr unspecified bind_back(Args&&... args);
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```
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Within this subclause:
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- `F` is the type of `f`,
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- `g` is a value of the result of a `bind_front` or `bind_back`
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invocation,
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- `BoundArgs` is a pack that denotes `decay_t<Args>...`,
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- `bound_args` is a pack of bound argument entities of `g` [[func.def]]
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of types `BoundArgs...`, direct-non-list-initialized with
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`std::forward<Args>(args)...`, respectively, and
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- `call_args` is an argument pack used in a function call
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expression [[expr.call]] of `g`.
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*Mandates:*
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- `(is_constructible_v<BoundArgs, Args> && ...)` is `true`, and
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- `(is_move_constructible_v<BoundArgs> && ...)` is `true`, and
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- if `is_pointer_v<F> || is_member_pointer_v<F>` is `true`, then
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`f != nullptr` is `true`.
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*Preconditions:* For each `Tᵢ` in `BoundArgs`, `Tᵢ` meets the
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*Cpp17MoveConstructible* requirements.
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*Returns:* A perfect forwarding call wrapper [[func.require]] `g` that
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does not have a target object, and has the call pattern:
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- `invoke(f, bound_args..., call_args...)` for a `bind_front`
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invocation, or
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- `invoke(f, call_args..., bound_args...)` for a `bind_back` invocation.
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*Throws:* Any exception thrown by the initialization of `bound_args`.
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