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Diffstat (limited to 'src/qml/doc/src/qtqml-qtquick-compiler-tech.qdoc')
| -rw-r--r-- | src/qml/doc/src/qtqml-qtquick-compiler-tech.qdoc | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/src/qml/doc/src/qtqml-qtquick-compiler-tech.qdoc b/src/qml/doc/src/qtqml-qtquick-compiler-tech.qdoc index 293546255f..3631a85b5f 100644 --- a/src/qml/doc/src/qtqml-qtquick-compiler-tech.qdoc +++ b/src/qml/doc/src/qtqml-qtquick-compiler-tech.qdoc @@ -7,7 +7,7 @@ \title Qt Quick Compiler \brief Overview of Qt Quick Compiler components -Qt Quick Compiler enables you to process QML and JavaScript code at compile +Qt Quick Compiler lets you process QML and JavaScript code at compile time, rather than at run time. This allows for: \list @@ -17,17 +17,17 @@ time, rather than at run time. This allows for: The Qt Quick Compiler consist of two components: \list - \li \l {QML Type Compiler} - \li \l {QML Script Compiler} + \li \l {QML type compiler} + \li \l {QML script compiler} \endlist \note \e qmltc, \e qmlsc and \l qmlcachegen are internal build tools. If you need to care about their invocation, you are either writing a build system, or you are doing something wrong. -\subtitle The QML Type Compiler +\section1 The QML type compiler -The \l{QML Type Compiler}, \e(qmltc) compiles QML types to C++ classes. These C++ +The \l{QML type compiler}, \e(qmltc) compiles QML types to C++ classes. These C++ classes are then added to your application and can be instantiated from other C++ code. This way you can avoid much of the overhead of using \l{QQmlComponent} to create instances of your QML types. In order to benefit from \l qmltc, you @@ -38,12 +38,16 @@ structure. It will fail if an unsupported language feature is encountered. It does not have to understand the JavaScript code in bindings and functions, though. -\subtitle The QML Script Compiler +\section1 The QML script compiler -The \l{QML Script Compiler}, (\e qmlsc and \e qmlcachegen) compiles bindings and +The \l{QML script compiler}, (\e qmlsc and \e qmlcachegen) compiles bindings and functions to both, an efficient byte code and C++ functions. This process automatically happens behind the scenes if you are using \l{qt_add_qml_module} -to specify your QML modules. At compile time, for each QML or JavaScript +to specify your QML modules. For more information about available options to +control different aspects of QML compilation, see +\l {Caching compiled QML sources}. + +At compile time, for each QML or JavaScript document a corresponding C++ file is created and built into the application. The C++ file then contains a \e{QML compilation unit}, which consists of: @@ -63,7 +67,7 @@ involved type analysis can be performed. Therefore, the generated C++ code is generally more efficient than the result of the JIT compilation. There are limitations on what JavaScript constructs can be compiled to C++. -For more information see \l {Limitations when compiling JavaScript}. +For more information, see \l {Limitations when compiling JavaScript to C++}. \e{qmlsc} will be used instead of \e{qmlcachegen} if the Qt Quick Compiler Extensions are installed. It has the following additional features over @@ -89,7 +93,7 @@ Compilation of bindings and functions to C++ is omitted if cache files are produced. Neither the CMake nor the qmake build system offered by Qt expose this functionality. -\subtitle Summary +\section1 Summary The following table summarizes the differences between \l{qmltc}, \l{qmlcachegen} and \l{qmlsc}: |