How to use the genfun.noApplicableMethod function in genfun

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github graalvm / graaljs / deps / npm / node_modules / protoduck / index.js View on Github external
}
    if (!argTypes) {
      argTypes = []
    }
    return new Constraint(this, thisType, argTypes)
  }
}
Duck.prototype.isDuck = true
Duck.prototype.isProtocol = true

const Protoduck = module.exports = define(['duck'], {
  createGenfun: ['duck', _metaCreateGenfun],
  addMethod: ['duck', _metaAddMethod]
}, { name: 'Protoduck' })

const noImplFound = module.exports.noImplFound = genfun.noApplicableMethod

module.exports.define = define
function define (types, spec, opts) {
  if (!isArray(types)) {
    // protocol(spec, opts?) syntax for method-based protocols
    opts = spec
    spec = types
    types = []
  }
  const duck = function (thisType, argTypes) {
    return duck.matches(thisType, argTypes)
  }
  Object.setPrototypeOf(duck, Duck.prototype)
  duck.isDerivable = true
  Object.defineProperty(duck, 'name', {
    value: (opts && opts.name) || 'Protocol'

genfun

Fast, prototype-friendly multimethods.

MIT
Latest version published 6 years ago

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