summaryrefslogtreecommitdiffstats
path: root/src/corelib/doc/snippets/qstring/stringbuilder.cpp
blob: c3a709bd4cd5bd77f9ace73c1841536104b2371e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

#include <QString>

using namespace Qt::StringLiterals;

//! [0]
    QString foo;
    QString type = "long";

    foo = "vector<"_L1 + type + ">::iterator"_L1;

    if (foo.startsWith("(" + type + ") 0x"))
        ...
//! [0]

//! [5]
    #include <QStringBuilder>

    QString hello("hello");
    QStringView el = QStringView{ hello }.mid(2, 3);
    QLatin1StringView world("world");
    QString message =  hello % el % world % QChar('!');
//! [5]

//! [6]
    QString str("QStringBuilder");

    // "s" type is deduced as QStringBuilder<...>
    auto s = "Like hot glue, " % str % " concatenates strings";

    // Similarly the return type of this lambda is deduced as QStringBuilder<...>
    auto concatenateStr = []() {
        return "Like hot glue, " % str % " concatenates strings";
    };
//! [6]

//! [7]
    QString s = "Like hot glue, " % str % " concatenates strings";

    // With a lambda, specify a trailing return type:
    auto concatenateStr = []() -> QString {
        return "Like hot glue, " % str % " concatenates strings";
    };
//! [7]