LaTeX: remove the left border of the listing inside the table

Question

Using LaTeX, I need to show a piece of code inside a table. Here is an example of what I'm trying to do:

\begin{document}
Par exemple :
\begin{center}
\begin{tabular}{lp{5cm}l}
\hline
Méthode & Description & Exemple d'utilisation\\
\hline
\texttt{isLetter()}& Indique si le caractère est une lettre de l'alphabet. &
\begin{lstlisting}[numbersep=0pt]
QChar MyChar('x');
bool IsLetter = MyChar.isLetter();
\end{lstlisting} \\
\hline
\texttt{toUpper()}& Retourne le même caractère mais en majuscules. & toto \\
\hline
\end{tabular}
\end{center}
\end{document}

Here is the result I get:

.

As you can see, there is a field to the left of the code. I think this is a field for numbering, but I do not need numbering, and I would like to get rid of it. I tried to change some parameters ( numbersep, xleftmargin), but none of them work the way I want.

UPDATE

Here is a complete document demonstrating the problem:

\documentclass[a4paper,11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern,textcomp}
\usepackage[frenchb]{babel}
\usepackage{listings}

\begin{document}
   \begin{enumerate}
   \item Par exemple :
      \begin{center}
      \begin{tabular}{lp{5cm}l}
      \hline
      Méthode & Description & Exemple d'utilisation\\
      \hline
      \texttt{isLetter()}& Indique si le caractère est une lettre de l'alphabet. &
      \begin{lstlisting}[numbersep=0pt]
QChar MyChar('x');
bool IsLetter = MyChar.isLetter();
// IsLetter vaut vrai
QChar MyChar2('&');
IsLetter = MyChar2.isLetter();
// IsLetter vaut faux
      \end{lstlisting}\\
      \hline
      \texttt{toUpper()}& Retourne le même caractère mais en majuscules. & toto \\
      \end{tabular}
      \end{center}
   \end{enumerate}
\end{document}

I can conclude that the problem is that the table is in an enumeration element.

Is there any way to solve this?

Answer 1

, . , , :

resetmargins = true | false ( : false)

true, , itemize reset, .

, :

\begin{lstlisting}[numbersep=0pt,resetmargins=true]

,
Christoph

Answer 2

. . , @{} .

\begin{tabular}{@{}lp{5cm}l}
...
\end{tabular}

@{} . .

\documentclass[a4paper,11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern,textcomp}
\usepackage[frenchb]{babel}
\usepackage{listings}

\begin{document}
   \begin{enumerate}
   \item Par exemple :
      \begin{center}
      \begin{tabular}{@{}lp{5cm}l}
      \hline
      Méthode & Description & Exemple d'utilisation\\
      \hline
      \texttt{isLetter()}& Indique si le caractère est une lettre de l'alphabet. &
      \begin{lstlisting}[numbersep=0pt]
QChar MyChar('x');
bool IsLetter = MyChar.isLetter();
// IsLetter vaut vrai
QChar MyChar2('&');
IsLetter = MyChar2.isLetter();
// IsLetter vaut faux
      \end{lstlisting}\\
      \hline
      \texttt{toUpper()}& Retourne le même caractère mais en majuscules. & toto \\
      \end{tabular}
      \end{center}
   \end{enumerate}
\end{document}

Answer 3

.

\begin{enumerate}[
        xleftmargin=-40pt %the 40pt may not apply depending on your environment
    ]
    % ... your enumeration here ...
\end{enumerate}

( )