QRegExp 编译时警告

Question

我正在开发一些 Qt 应用程序，其 main window 由 QPlainTextEdit subclassed log window 用于输出事件。我有三种类型的消息：

信息消息，表示一个以[INFO]开头的QString子串
警告消息，表示以 [WARNING] 子字符串

QString

错误信息，表示一个以[ERROR]子串

QString

现在，我想用 QSyntaxHighlighter class 实现的是根据消息的类型更改这些消息的颜色（INFO 类型 - Qt::DarkBlue 颜色，WARNING 类型 - Qt::DarkYellow 颜色，ERROR 类型 - Qt::DarkRed 颜色）这是代码块，应该完成任务：

void UeLogWindowTextHighlighter::ueSetupRules()
{
    UeHighlightRule* ueRuleInfo=new UeHighlightRule(this);
    UeHighlightRule* ueRuleWarning=new UeHighlightRule(this);
    UeHighlightRule* ueRuleError=new UeHighlightRule(this);

    this->ueInfoStartExpression()->setPattern("^[INFO].\*");        // FIRST WARNING
    this->ueWarningStartExpression()->setPattern("^[WARNING].\*");  // SECOND WARNING
    this->ueErrorStartExpression()->setPattern("^[ERROR].\*");      // THIRD WARNING

    this->ueInfoExpressionCharFormat()->setForeground(Qt::darkGray);
    this->ueWarningExpressionCharFormat()->setForeground(Qt::darkYellow);
    this->ueErrorExpressionCharFormat()->setForeground(Qt::darkRed);

    ueRuleInfo->ueSetPattern(this->ueInfoStartExpression());
    ueRuleInfo->ueSetTextCharFormat(this->ueInfoExpressionCharFormat());

    this->ueHighlightRules()->append(ueRuleInfo);

    ueRuleWarning->ueSetPattern(this->ueWarningStartExpression());
    ueRuleWarning->ueSetTextCharFormat(this->ueWarningExpressionCharFormat());

    this->ueHighlightRules()->append(ueRuleWarning);

    ueRuleError->ueSetPattern(this->ueErrorStartExpression());
    ueRuleError->ueSetTextCharFormat(this->ueErrorExpressionCharFormat());

    this->ueHighlightRules()->append(ueRuleError);
}   // ueSetupRules

但是，当我编译项目时，我得到以下警告:

../../../gui/uelogwindowtexthighlighter.cpp: In member function 'void UeLogWindowTextHighlighter::ueSetupRules()': ../../../gui/uelogwindowtexthighlighter.cpp:58:47: warning: unknown escape sequence: '\*' [enabled by default]
     this->ueInfoStartExpression()->setPattern("^[INFO].\*");
                                               ^ ../../../gui/uelogwindowtexthighlighter.cpp:59:50: warning: unknown escape sequence: '\*' [enabled by default]
     this->ueWarningStartExpression()->setPattern("^[WARNING].\*");
                                                  ^ ../../../gui/uelogwindowtexthighlighter.cpp:60:48: warning: unknown escape sequence: '\*' [enabled by default]
     this->ueErrorStartExpression()->setPattern("^[ERROR].\*");
                                                ^

因此消息没有着色（这是我的怀疑）。 我的正则表达式有什么问题？ 我在关注 this question and answer on SO。

Answer 1

星级 (*) 不必转义。删除 \ 或者如果你需要 \ 它应该被转义并且写双 \ (\)。

QRegExp 编译时警告

QRegExp compile time warnings

c++

qt

qregexp