print.md

IO print library

Source: include/stdlib/io/print.ml

Extendable and safe frontend for printf/fprintf.

Functions

Function	Description
_print	print handlers that call fprintf based on the argument type

Macro

Macro	Description
print	Prints arguments to stdout
println	Prints arguments to stdout, followed by newline
print_to	Prints arguments to the specified stream
println_to	Prints arguments to the specified stream, followed by newline
delimit	Splices a list of arguments using the given delimiter

Extensibility

Important

To extend print or any of the macros, simply declare a new _print helper with a stream argument and an argument of the custom type to extend.

import stdlib.c.cdef
import stdlib.io.print

struct exstruct
    cnt: int64
    cptr: void*
end

fun _print(st: c_stream, arg: exstruct): void
    print_to(st, "exstruct(cnt=", arg.cnt, ", cptr=", arg.cptr, ")")
end

fun main: int32
    exstruct(11, null).print
    ret 0
end