- Qt 5.15
- Qt XML Patterns
- C++ Classes
- QSourceLocation
- Qt 5.15.19 Reference Documentation

# QSourceLocation Class

The QSourceLocation class identifies a location in a resource by URI, line, and column. More...

Header: | #include <QSourceLocation>
qmake: | QT += xmlpatterns
Since: | Qt 4.4

This class was introduced in Qt 4.4.

- List of all members, including inherited members

Note: All functions in this class are reentrant.

## Public Functions

| QSourceLocation(const QUrl &u, int l = -1, int c = -1)
| QSourceLocation(const QSourceLocation &other)
| QSourceLocation()
QSourceLocation & | operator=(const QSourceLocation &other)
| ~QSourceLocation()
qint64 | column() const
bool | isNull() const
qint64 | line() const
void | setColumn(qint64 newColumn)
void | setLine(qint64 newLine)
void | setUri(const QUrl &newUri)
QUrl | uri() const
bool | operator!=(const QSourceLocation &other) const
bool | operator==(const QSourceLocation &other) const

## Related Non-Members

uint | qHash(const QSourceLocation &location)
QDebug | operator<<(QDebug debug, const QSourceLocation &sourceLocation)

## Detailed Description

QSourceLocation is a simple value based class that has three properties, uri(), line(), and column(), that, taken together, identify a certain point in a resource, e.g., a file or an in-memory document.

line() and column() refer to character counts (not byte counts), and they both start from 1, as opposed to 0.

## Member Function Documentation

### QSourceLocation::QSourceLocation(const QUrl &u, int l = -1, int c = -1)

Constructs a QSourceLocation with URI u, line l and column c.

### QSourceLocation::QSourceLocation(const QSourceLocation &other)

Constructs a QSourceLocation that is a copy of other.

### QSourceLocation::QSourceLocation()

Construct a QSourceLocation that doesn't identify anything at all.

For a default constructed QSourceLocation(), isNull() returns `true`.

### QSourceLocation &QSourceLocation::operator=(const QSourceLocation &other)

Assigns this QSourceLocation instance to other.

### QSourceLocation::~QSourceLocation()

Destructor.

### qint64 QSourceLocation::column() const

Returns the current column number. The column number refers to the count of characters, not bytes. The first column is column 1, not 0. The default value is -1, indicating the column number is unknown.

See also setColumn().

### bool QSourceLocation::isNull() const

Returns `true` if this QSourceLocation doesn't identify anything.

For a default constructed QSourceLocation, this function returns `true`. The same applies for any other QSourceLocation whose uri() is invalid.

### qint64 QSourceLocation::line() const

Returns the current line number. The first line number is 1, not 0. The default value is -1, indicating the line number is unknown.

See also setLine().

### void QSourceLocation::setColumn(qint64 newColumn)

Sets the column number to newColumn. 0 is an invalid column number. The first column number is 1.

See also column().

### void QSourceLocation::setLine(qint64 newLine)

Sets the line number to newLine. 0 is an invalid line number. The first line number is 1.

See also line().

### void QSourceLocation::setUri(const QUrl &newUri)

Sets the URI to newUri.

See also uri().

### QUrl QSourceLocation::uri() const

Returns the resource that this QSourceLocation refers to. For example, the resource could be a file in the local file system, if the URI scheme is `file`.

See also setUri().

### bool QSourceLocation::operator!=(const QSourceLocation &other) const

Returns `true` if this QSourceLocation is not equal to other; `false` otherwise.

### bool QSourceLocation::operator==(const QSourceLocation &other) const

Returns `true` if this QSourceLocation is equal to other; `false` otherwise.

Two QSourceLocation instances are equal if their uri(), line() and column() are equal.

QSourceLocation instances for which isNull() returns true are considered equal.

## Related Non-Members

### uint qHash(const QSourceLocation &location)

Computes a hash key for the QSourceLocation location.

This function was introduced in Qt 4.4.

### QDebug operator<<(QDebug debug, const QSourceLocation &sourceLocation)

Prints sourceLocation to the debug stream debug.

This function was introduced in Qt 4.4.