carbon-lang/core/io.carbon

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

// TODO: This library is not part of the design. Either write a matching
// proposal or remove this.

package Core library "io";

import library "prelude";

// TODO: Support printing other types.
// TODO: Consider rewriting using native support once library support exists.
fn Print(x: i32) = "print.int";
fn PrintChar(x: char) -> i32 = "print.char";

fn PrintStr(msg: str) {
  let size: i64 = msg.Size() as i64;
  var i: i64 = 0;
  while (i < size) {
    PrintChar(msg[i]);
    ++i;
  }
}

// TODO: Return an `Optional(char)` instead of `i32`.
fn ReadChar() -> i32 = "read.char";

// TODO: Change this to a global constant once they are fully supported.
fn EOF() -> i32 { return -1; }