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:195 :195

	English <<ref_kind,`kind::int64`>> 26/10000 · 26
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	English `std::int64_t` 14/10000 · 14
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	English A 64 bit signed integer. 24/10000 · 24
:195 :195

	English <<ref_kind,`kind::uint64`>> 27/10000 · 27
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	English `std::uint64_t` 15/10000 · 15
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	English A 64 bit unsigned integer. 26/10000 · 26
:195 :195

	English <<ref_kind,`kind::double_`>> 28/10000 · 28
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	English `double` 8/10000 · 8
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	English A `double` holding a floating-point value. 42/10000 · 42
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	English <<ref_kind,`kind::bool_`>> 26/10000 · 26
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	English https://en.cppreference.com/w/cpp/keyword/bool[`bool`] 54/10000 · 54
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	English A `bool` holding `true` or `false`. 35/10000 · 35
:195 :195

	English <<ref_kind,`kind::null`>> 25/10000 · 25
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	English ^\| — \| A monostate value representing null. \|=== 54/10000 · 54
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	English The return value from emplace can be used to perform assignment or to capture a reference to the underlying element for later inspection or modification: 153/10000 · 153
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	English If the <<ref_kind>> of a <<ref_value>> is known, functions such as <<ref_value_as_bool,`value::as_bool`>> or <<ref_value_as_string,`value::as_string`>> may be used to obtain a reference to the underlying representation without changing the existing value: 255/10000 · 255
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	English However, as shown above these functions throw an exception if the kind in the <<ref_value>> does not match the kind denoted by the function signature. This can be used as a concise form of validation: access values as if they were the right type, but handle the resulting exception indicating if the schema of the JSON is not valid. 332/10000 · 332
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	English We can query a value for its underlying representation of a particular kind in a way that does not throw exceptions by requesting a pointer which may be null, instead of a reference. Here we use <<ref_value_if_string,`value::if_string`>> to conditionally perform an assignment without using exceptions: 302/10000 · 302
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	English Functions returning {ref_result} allow you to use both approaches: 66/10000 · 66
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	English Formatted Output 16/10000 · 16

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