tmp/tmphh8pkzu6/{from.md → to.md}
RENAMED
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### `ranges::reserve_hint` <a id="range.prim.size.hint">[[range.prim.size.hint]]</a>
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The name `ranges::reserve_hint` denotes a customization point object
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[[customization.point.object]].
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Given a subexpression `E` with type `T`, let `t` be an lvalue that
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denotes the reified object for `E`. Then:
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- If `ranges::size(E)` is a valid expression, `ranges::reserve_hint(E)`
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is expression-equivalent to `ranges::size(E)`.
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- Otherwise, if `auto(t.reserve_hint())` is a valid expression of
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integer-like type [[iterator.concept.winc]], `ranges::reserve_hint(E)`
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is expression-equivalent to `auto(t.reserve_hint())`.
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- Otherwise, if `T` is a class or enumeration type and
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`auto(reserve_hint(t))` is a valid expression of integer-like type
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where the meaning of `reserve_hint` is established as-if by performing
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argument-dependent lookup only [[basic.lookup.argdep]], then
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`ranges::reserve_hint(E)` is expression-equivalent to that expression.
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- Otherwise, `ranges::reserve_hint(E)` is ill-formed.
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[*Note 1*: Diagnosable ill-formed cases above result in substitution
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failure when `ranges::reserve_hint(E)` appears in the immediate context
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of a template instantiation. — *end note*]
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[*Note 2*: Whenever `ranges::reserve_hint(E)` is a valid expression,
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its type is integer-like. — *end note*]
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