io — printing

Source: std/io.mw. No imports of its own — this is the base module most other output-producing code builds on.

Foreign bindings

Function	Binds to (C)
c_puts(s: *u8) -> i32	puts
c_printf(fmt: *u8, val: rawptr) -> i32	printf
c_fputs(s: *u8, stream: rawptr) -> i32	fputs
c_stderr() -> rawptr	stderr

These are internal — use the wrapper functions below instead.

Functions

print(s: *u8)

Writes a null-terminated string to stdout, without a trailing newline. Implemented as c_printf("%s", s).

println(s: *u8)

Writes a null-terminated string to stdout, followed by a newline. Implemented via puts.

print_i64(n: i64)

Writes a 64-bit signed integer to stdout, no trailing newline (printf("%d", n)).

println_i64(n: i64)

Writes a 64-bit signed integer to stdout, followed by a newline (printf("%d\n", n)).

eprint(s: *u8)

Writes a null-terminated string to stderr, no trailing newline.

eprintln(s: *u8)

Writes a null-terminated string to stderr, followed by a newline.

Example

@import("io.mw")

@export fn main(argc: i32, argv: rawptr) -> i32 {
    println("starting up");
    print("argc = ");
    println_i64(cast(i64) argc);
    eprintln("this goes to stderr");
    ret 0;
};