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@@ -52,7 +52,7 @@ basic_json(basic_json&& other) noexcept;
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The postcondition of this constructor can be restored by calling [`clear()`](clear.md).
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2. Create a `#!json null` JSON value. It either takes a null pointer as parameter (explicitly creating `#!json null`)
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or no parameter (implicitly creating `#!json null`). The passed null pointer itself is not read -- it is only used to
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or no parameter (implicitly creating `#!json null`). The passed null pointer itself is not read — it is only used to
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choose the right constructor.
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3. This is a "catch all" constructor for all compatible JSON types; that is, types for which a `to_json()` method
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@@ -113,19 +113,22 @@ basic_json(basic_json&& other) noexcept;
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```mermaid
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flowchart TD
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A(["initializer_list init"]) --> B{"empty, or every element is a 2-element<br/>array whose first element is a string?"}
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B -->|"yes"| C{"type_deduction"}
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B -->|"no"| D{"type_deduction"}
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A(["initializer_list init"]) --> B{{"empty, or every element is a 2-element<br/>array whose first element is a string?"}}
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B -->|"yes"| C{{"type_deduction"}}
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B -->|"no"| D{{"type_deduction"}}
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C -->|"true"| OBJ["create object"]
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C -->|"false"| E{"manual_type"}
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C -->|"false"| E{{"manual_type"}}
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E -->|"object"| OBJ
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E -->|"array"| ARR["create array"]
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D -->|"true"| ARR
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D -->|"false"| F{"manual_type"}
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D -->|"false"| F{{"manual_type"}}
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F -->|"array"| ARR
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F -->|"object"| ERR["throw type_error.301"]
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```
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<p class="nj-caption" markdown>Decision flow for an initializer list: hexagons are checks, edge labels are their
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outcomes, and rectangles are the resulting value or exception.</p>
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The rules aim to create the best fit between a C++ initializer list and JSON values. The rationale is as follows:
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1. The empty initializer list is written as `#!cpp {}` which is exactly an empty JSON object.
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@@ -922,12 +925,13 @@ basic_json(basic_json&& other) noexcept;
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## See also
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- [array](array.md) create a JSON array value, forcing array creation from an initializer list even when it looks like
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- [`array`](array.md) - create a JSON array value, forcing array creation from an initializer list even when it looks like
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an object
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- [object](object.md) create a JSON object value, forcing object creation from an initializer list
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- [binary](binary.md) create a JSON binary array value
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- [operator=](operator=.md) copy assignment operator
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- [`object`](object.md) - create a JSON object value, forcing object creation from an initializer list
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- [`binary`](binary.md) - create a JSON binary array value
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- [`operator=`](operator=.md) - copy assignment operator
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- [Creating JSON values](../../features/creating_values.md) - the article on creating JSON values
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- [Converting values](../../features/conversions.md) - which C++ types can be converted
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## Version history
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