Renderingen-US

async

Translation status: English reader-locale proof. Term names and code fences follow the en pack; supporting prose may still be English.

Callable posture for asynchronous finite functions.

Aliases: async

Syntax: fn name(…) async → T

Category#

async

Examples#

radix/corpus/fiet/fiet.fab (canonical · keyword)#

Callable posture for asynchronous finite functions.

# =============================================================================
# async — Asynchronous finite callable posture
# =============================================================================
#
# What this teaches:
#   • Preferred async posture word after the parameter list: `async → T`.
#   • Return type is observed as `promise<T>` at call sites.
#   • Consume with `await_const`, `await_var`, `return_await`, or `await`.
#
# Common mistakes:
#   • Using bare `yield` to await — await is not yield; use await morphology.
#
# See also: future, promise, await_const, await
# =============================================================================

# GRAMMAR:
#   callablePosture :← 'async'
#
# EXPECTED OUTPUT:
#   42

fn responde() async → int {
    return 42
}

async_main {
    await_const _ responsum ← responde()
    print responsum
}

Expected output:

42