circuit backend_hooks {
backend latex {
preamble: "\\newcommand{\\backendtag}{backend hook}"
before: "\\node[anchor=south west] at (0,0.35) {\\backendtag};"
after: "% latex backend hook end"
}
backend typst {
preamble: "#let backend-tag = [backend hook]"
before: "#align(center)[#backend-tag]"
after: "#align(center)[end hook]"
}
qubit q: "|0>" -> "|1>"
h q
}