Named Arguments

Instead of positional arguments, you can use the names of arguments you want to set:

pluto
local function process_file(file, mode = "r", version = 1)
    print($"Processing {file} with mode '{mode}' and version {version}")
end
process_file(file = "hello.txt", version = 2) -- "Processing hello.txt with mode 'r' and version 2"

Mixing arguments

You can use positional arguments for the first few arguments and then use named arguments for the latter ones, for example:

pluto
local function process_file(file, mode = "r", version = 1)
    print($"Processing {file} with mode '{mode}' and version {version}")
end
process_file("hello.txt", version = 2) -- "Processing hello.txt with mode 'r' and version 2"

Global functions

This feature is implemented entirely in the parser, so it only works for functions where the parser knows the signature. However, $declare can be used to (re)introduce this information:

pluto
$declare sdiv: function(dividend: number, divisor: number): number
print(sdiv(divisor = 3, dividend = 6)) --> 2