use std/io use std/vec.Vec struct Counter { value: i32 } blocking func main(): i32! { var counters = Vec [Counter { value: 1 }, Counter { value: 2 }, Counter { value: 3 }] for counter in &+counters { counter.value += 10 } var borrowed_total: i32 = 0 for counter in &counters { borrowed_total += counter.value } var moved_total: i32 = 0 for counter in move counters { moved_total += counter.value } let message = "borrowed: ${borrowed_total}, moved: ${moved_total}\n" io.print(&message)? return 0 }

func main(): i32 { let value = load_value() catch failure { fallback_for(failure.message()) } if value == 42 { return 0 } return 1 } func load_value(): i32! { return error.new("example.unavailable", "the primary value is unavailable") } func fallback_for(message: &str): i32 { return 42 }

use std/task use std/time use std/time.Duration async func delayed(value: i32): i32 { await time.sleep(Duration.from_milliseconds(1)) return value } async func main(): i32! { let (left, right) = await task.join(delayed(20), delayed(22)) if left + right != 42 { return error.new("example.unexpected_total", "joined tasks returned the wrong total") } return 0 }

use std/io use std/url.Url blocking func main(): i32! { let url = Url.parse("HTTP://Example.COM:80/a/../status?q=ready#fragment")? let canonical = url.to_string() let authority = url.authority() let target = url.request_target() io.println(&canonical)? io.println(&authority)? io.println(&target)? return 0 }

nocter-toolchain-contract

Responsibility

Own the closed contract describing declarations and standard-library roles that a selected Nocter toolchain must provide.

Contract

Discovery and declaration lowering bind exact source declarations to this contract. Checking and target validation consume resolved role identities rather than standard-library spellings. The execution-fact authority uses the selected standard package's exact AllocationRequest callable as its backing-storage request boundary; OS primitive names are not semantic evidence. Checking likewise receives exact slice and string-view length methods as closed semantic roles, so flow proof never recognizes a standard API from its spelling or physical path.

Invariants

Toolchain roles are source-independent and versioned with the compiler.
A standard path does not grant authority by itself.
Consumers cannot extend the closed role set through ordinary user source.

nocter-toolchain-contract#

Responsibility#

Contract#

Invariants#

nocter-toolchain-contract

Responsibility

Contract

Invariants