This is not a very good solution but illustrates a somewhat cool "trick"

function chained-grep {
    local pattern="$1"
    if [[ -z "$pattern" ]]; then
        cat
        return
    fi    

    shift
    grep -- "$pattern" | chained-grep "$@"
}

cat something | chained-grep all patterns must match order but matter dont

grep pattern1 | grep pattern2 | ...

I would like to use single grep because I am building arguments dynamically, so everything has to fit in one string

It's actually possible to build the pipeline dynamically (without resorting to eval):

# Executes: grep "$1" | grep "$2" | grep "$3" | ...
function chained-grep {
    local pattern="$1"
    if [[ -z "$pattern" ]]; then
        cat
        return
    fi    

    shift
    grep -- "$pattern" | chained-grep "$@"
}

cat something | chained-grep all patterns must match order but matter dont

It's probably not a very efficient solution though.

This is not a very good solution but illustrates a somewhat cool "trick"

function chained-grep() {
    local pattern="$1"
    if [[ -z "$pattern" ]]; then
        cat
        return
    fi    

    shift
    grep -- "$pattern" | chained-grep "$@"
}

cat something | chained-grep all patterns must match order but matter dont

This is not a very good solution but illustrates a somewhat cool "trick"

function chained-grep {
    local pattern="$1"
    if [[ -z "$pattern" ]]; then
        cat
        return
    fi    

    shift
    grep -- "$pattern" | chained-grep "$@"
}

cat something | chained-grep all patterns must match order but matter dont