tmp/tmp9dls7_f5/{from.md → to.md}
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### Concept <a id="concept.default.init">[[concept.default.init]]</a>
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``` cpp
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template<class T>
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inline constexpr bool is-default-initializable = see below; // exposition only
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template<class T>
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concept default_initializable = constructible_from<T> &&
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requires { T{}; } &&
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is-default-initializable<T>;
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```
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For a type `T`, *`is-default-initializable`*`<T>` is `true` if and only
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if the variable definition
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``` cpp
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T t;
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```
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is well-formed for some invented variable `t`; otherwise it is `false`.
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Access checking is performed as if in a context unrelated to `T`. Only
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the validity of the immediate context of the variable initialization is
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considered.
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