zsh - variable expansion fails in nested functions

Question

I defined a nested function in my .zshrc hoping to define multiple similar zsh functions :

makefunc_gman () {
    local MAN_SEC_LIST=(1 2 3 4 5 6 7 8) 
    for GMAN_SEC in ${MAN_SEC_LIST}
    do
        "gman${GMAN_SEC}" () {
            gdir_C "$1" "man${GMAN_SEC}" 
        }
    done
}

makefunc_gman # calls the function

The functions I wanted to define the function above are gman1, gman2 to gman8.
I want to get a function named gman1 which calls gdir_C "$1" man1 after sourcing this function above.
gdir_C in the code is another function defined in .zshrc.

But when I sourced .zshrc, where gman1 gave me this:

$ where gman1        
gman1 () {
    local MAN_GMAN_SEC="man${GMAN_SEC}" 
    gdir_C "$1" "man${GMAN_SEC}"
}

It seemed that the variable $GMAN_SEC in this nested function is not expanded. How do I get the variable to expand correctly? Thanks!

chepner · Accepted Answer · 2020-03-22 15:35:45Z

2

You would need to use eval, as zsh doesn't have nested scopes or closures.

makefunc_gman () {
    local MAN_SEC_LIST=(1 2 3 4 5 6 7 8) 
    for GMAN_SEC in ${MAN_SEC_LIST}
    do
        eval "gman${GMAN_SEC} () {
            gdir_C \"\$1\" man${GMAN_SEC}
        }"
    done
}

answered Mar 22, 2020 at 15:35

chepner

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