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@@ -13,8 +13,8 @@ Inserts `value` into `array` as a new element before position `idx`, which must
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[`push_back`](push_back.md), a [null](../basic_json_view/is_null.md) `array` does *not* first become an empty array:
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`array` must already be an array.
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`value` is accepted three ways: a [`basic_json_view`](../basic_json_view/index.md) of *any* document -- read-only or
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editable, and it does not have to be `array`'s own document -- which is copied so that nothing is shared with the
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`value` is accepted three ways: a [`basic_json_view`](../basic_json_view/index.md) of *any* document — read-only or
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editable, and it does not have to be `array`'s own document — which is copied so that nothing is shared with the
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source document afterward; a `BasicJsonType` value; or anything `BasicJsonType` can be constructed from (numbers,
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strings, `#!cpp bool`, `#!cpp nullptr`, containers, ...).
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@@ -44,16 +44,16 @@ a view of the new element, now holding `value`
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## Exception safety
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Basic exception safety: `value` is fully encoded -- including the checks below -- into storage owned by the document
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Basic exception safety: `value` is fully encoded — including the checks below — into storage owned by the document
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before anything already reachable from [`root()`](root.md) is touched, so a failure while encoding `value` (an
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invalid argument, or `#!cpp std::bad_alloc`) leaves the document completely unchanged, other than memory allocated
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for the encoding that is not reclaimed. A failure of a later allocation -- while `array` switches from its parsed
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layout to a growable block, or while that block grows, see [Notes](#notes) -- can still leave `array` already
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for the encoding that is not reclaimed. A failure of a later allocation — while `array` switches from its parsed
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layout to a growable block, or while that block grows, see [Notes](#notes) — can still leave `array` already
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switched to that layout even though `value` itself was not inserted.
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## Exceptions
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Throws [`type_error.309`](../../home/exceptions.md#jsonexceptiontype_error309) if `array` is not an array -- the same
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Throws [`type_error.309`](../../home/exceptions.md#jsonexceptiontype_error309) if `array` is not an array — the same
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message [`BasicJsonType::insert`](../basic_json/insert.md) throws for the same type; a null `array` throws this too
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(see above). Throws [`out_of_range.401`](../../home/exceptions.md#jsonexceptionout_of_range401) if `idx` is negative,
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or if `#!cpp idx > array.size()`. Throws
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@@ -62,7 +62,7 @@ document") if `array` is a [discarded](../basic_json_view/is_discarded.md) view
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Throws [`type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302) if `value` is a
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[discarded](../basic_json_view/is_discarded.md) view or a [discarded](../basic_json/is_discarded.md) `BasicJsonType`
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value, and [`type_error.319`](../../home/exceptions.md#jsonexceptiontype_error319) if `value` is (or contains) a
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binary value -- `BasicJsonType` can hold one, but a `json_document` cannot. Throws
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binary value — `BasicJsonType` can hold one, but a `json_document` cannot. Throws
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[`type_error.316`](../../home/exceptions.md#jsonexceptiontype_error316) if `value` is (or contains) a string that is
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not valid UTF-8, with the same message [`BasicJsonType::dump()`](../basic_json/dump.md) gives for that string.
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@@ -76,8 +76,8 @@ grows in amortized constant time; inserting before the end within that block sti
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## Notes
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Like [`set`](set.md) on a member or an element, `insert` never moves an existing *element's value* -- only where
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`array`'s *links* to its elements live -- so a view of an existing element of `array` stays valid across an
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Like [`set`](set.md) on a member or an element, `insert` never moves an existing *element's value* — only where
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`array`'s *links* to its elements live — so a view of an existing element of `array` stays valid across an
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`insert`, and keeps referring to the same element even though its index shifts. Any iterator already taken over
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`array` is invalidated, since it was walking the old layout. See [Edits](index.md#edits) for what stays valid across
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an edit in general.
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@@ -88,7 +88,7 @@ an edit in general.
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The example below inserts a step into the middle of a deployment plan, without touching the steps that come
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after it, and shows that a view taken before the insert keeps referring to the same element even though its
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index shifts -- something a plain `json`/`ordered_json` array, or its `std::vector`-based storage, has no
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index shifts — something a plain `json`/`ordered_json` array, or its `std::vector`-based storage, has no
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equivalent for.
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```cpp
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@@ -164,11 +164,12 @@ an edit in general.
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## See also
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- [push_back](push_back.md) - append to an array
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- [erase](erase.md) - remove an object member, an array element, or the value a JSON pointer refers to
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- [set](set.md) - replace a value, or set an object member, an array element, or the value a JSON pointer refers to
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- [`push_back`](push_back.md) - append to an array
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- [`erase`](erase.md) - remove an object member, an array element, or the value a JSON pointer refers to
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- [`set`](set.md) - replace a value, or set an object member, an array element, or the value a JSON pointer refers to
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- [`BasicJsonType::insert`](../basic_json/insert.md) - the corresponding function of `basic_json`
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- [Edits](index.md#edits) - what an edit guarantees, for every overload
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- [Zero-copy JSON views](../../features/json_view.md#editing-a-document) - what an edit guarantees and costs
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## Version history
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