Create a function that creates n placeholders

For internal use by the placeholder_format tweak.

Usage

make_placeholder_fun(pattern)

Arguments

pattern

[character(1)]
Any character, optionally followed by 1 or name. Examples: "?", "$1", ":name"

Value

[function(n)]
A function with one argument n that returns a vector of length n with placeholders of the specified format.

Examples

body(DBItest:::make_placeholder_fun("?"))
#> rep("?", n)
DBItest:::make_placeholder_fun("?")(2)
#> [1] "?" "?"
DBItest:::make_placeholder_fun("$1")(3)
#> [1] "$1" "$2" "$3"
DBItest:::make_placeholder_fun(":name")(5)
#>    a    b    c    d    e 
#> ":a" ":b" ":c" ":d" ":e"