Las flechas curvas de tikz-cd no funcionan

Question

Estoy usando Quiver y tengo problemas para hacer diagramas con flechas curvas. Por ejemplo, me propone poner este es mi documento:

\begin{tikzcd}[ampersand replacement=\&,column sep=2.25em]
    A \& B
    \arrow[curve={height=-12pt}, from=1-1, to=1-2]
\end{tikzcd}

pero no se compila. TexMaker me dice: Error de paquete tikz: + o - esperado y el uso de \tikz@curveCdot no coincide con su definición.

Utilizo ambos tikzy tikz-cden mi preámbulo.

MWE:

\documentclass{article}

\usepackage[french,english]{babel}

\usepackage{tikz-cd}
\usetikzlibrary{calc}

% A TikZ style for curved arrows of a fixed height, due to AndréC.
\tikzset{curve/.style={settings={#1},to path={(\tikztostart)
    .. controls ($(\tikztostart)!\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
    and ($(\tikztostart)!1-\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
    .. (\tikztotarget)\tikztonodes}},
    settings/.code={\tikzset{quiver/.cd,#1}
        \def\pv##1{\pgfkeysvalueof{/tikz/quiver/##1}}},
    quiver/.cd,pos/.initial=0.35,height/.initial=0}



\begin{document}

\begin{tikzcd}[ampersand replacement=\&]
    A \& B
    \arrow[curve={height=-12pt}, from=1-1, to=1-2]
\end{tikzcd}

\end{document}

Answer 1

Te olvidas de cargar la babelbiblioteca.

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[french,english]{babel}

\usepackage{tikz-cd}
\usetikzlibrary{calc,babel} % <--- IMPORTANT!

% A TikZ style for curved arrows of a fixed height, due to AndréC.
\tikzset{
  curve/.style={
    settings={#1},
    to path={
      (\tikztostart)
      .. controls ($(\tikztostart)!\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
      and ($(\tikztostart)!1-\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
      .. (\tikztotarget)\tikztonodes
    },
  },
  settings/.code={%
    \tikzset{quiver/.cd,#1}%
    \def\pv##1{\pgfkeysvalueof{/tikz/quiver/##1}}%
  },
  quiver/.cd,
  pos/.initial=0.35,
  height/.initial=0,
}

\begin{document}

\begin{tikzcd}[ampersand replacement=\&]
    A \& B
    \arrow[curve={height=-12pt}, from=1-1, to=1-2]
\end{tikzcd}

\begin{tikzcd}
    A & B
    \arrow[curve={height=-12pt}, from=1-1, to=1-2]
\end{tikzcd}

\end{document}

No es necesario ampersand replacement.

Answer 2

No conozco la opción curve, pero ¿por qué no usas una curva simple (izquierda o derecha)?

\documentclass{article}
\usepackage{tikz-cd}

\begin{document}
\begin{tikzcd}[ampersand replacement=\&,column sep=2.25em]
    A \& B
    \arrow[bend right, from=1-1, to=1-2]
\end{tikzcd}
\end{document}