diff options
| author | Johannes Grunenberg <nerixdev@outlook.de> | 2025-05-16 19:46:37 +0200 |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@intel.com> | 2025-06-18 18:03:58 +0000 |
| commit | e97b9cd671003e2b2ab2f66bc649cc76fcc3a9a0 (patch) | |
| tree | 5cee31ee121c2e26f4a75481c74ca89b01467c77 /src/corelib/doc/snippets | |
| parent | 522d505dd81834d22d366d0f36a26451dedafe11 (diff) | |
QJsonObject/QCborMap: Add asKeyValueRange()
This adds {QJsonObject,QCborMap}::asKeyValueRange() which returns a
range over key-value pairs of the object/map
(`pair<QAnyStringView, QJsonValueRef>` and
`pair<QCborValueConstRef, QCborValue>`).
This uses QKeyValueIterator under the hood. QJsonObject's iterator only
iterates over the items, so using it in a range-based for loop won't
give users access to the key. With `asKeyValueRange` one can iterate
over both keys and values and conveniently use structured bindings.
QCborMap's iterator already iterates over key-value pairs, so
`asKeyValueRange` is provided for API symmetry.
In `QKeyValueIterator`, this adds a fourth template parameter `Traits`
to support custom `key()` and `value()` functions.
This is specifically needed for `QJsonObject`, as its actualy key is a
string view, but `key()` returns a `QString`.
[ChangeLog][QtCore][QJsonObject] Added asKeyValueRange to iterate with a
range-based for loop over key-value pairs with support for structured
bindings.
[ChangeLog][QtCore][QCborMap] Added asKeyValueRange to iterate with a
range-based for loop over key-value pairs with support for structured
bindings.
Pick-to: 6.10
Change-Id: I68d97fada8b2d7ef7224f1beb5aa685aac3d1b16
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/doc/snippets')
| -rw-r--r-- | src/corelib/doc/snippets/code/src_corelib_serialization_qjsonobject.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qjsonobject.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qjsonobject.cpp new file mode 100644 index 00000000000..a6a1cba7322 --- /dev/null +++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qjsonobject.cpp @@ -0,0 +1,17 @@ +// Copyright (C) 2025 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +//! [1] +QJsonObject obj{ + { "something", "is" }, + { "in", "this" }, + { "object", 42 }, +}; + +for (auto [key, value] : obj.asKeyValueRange()) { + qDebug() << key << "->" << value; + if (key == "object") + value = "!"; // modify the object at this key +} +qDebug() << obj["object"]; // QJsonValue(string, "!") +//! [1] |