实现

Declares that a type implements one or more 契约 contracts.

Aliases: implements

Syntax: 类 <name> 实现 <interface-list> <block>

Category#

type

Related#

• 类
• 契约

Examples#

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

Declares that a type implements one or more 契约 contracts.

# =============================================================================
# 实现 — Declares that a type implements one or more 契约 contracts
# =============================================================================
#
# What this teaches:
#   • Declares that a type implements one or more 契约 contracts.
#   • Related keywords: 类, 契约
#
# Common mistakes:
#   • Declaring `类 实现 Implendum` without implementing all required methods — every method signature in the 契约 must have a body in the 类.
#
# See also: 类, 契约
# =============================================================================

# 实现 — 类 implements a 契约 (interface contract)
#
# 类 Nomen 实现 Implendum { … }
#
# GRAMMAR:
#   genusDecl :← '类' ident '实现' ident '{' methodDecl* '}'
#
# EXPECTED OUTPUT:
#   implet.expected — Aurelia from 契约 plenum().

interface Nominatum {
    fn plenum() → string
}

class Civis implements Nominatum {
    var string 名称

    fn plenum() → string {
        # satisfies 契约 requirement
        return "§"(self.nomen)
    }
}

main {
    const Civis civis ← Civis { 名称 = "Aurelia" }
    print civis.plenum()
}

Expected output:

Aurelia