Method evalCall

thunks.go:195–230

(arguments callArguments, i *interpreter)

}

func (closure *closure) evalCall(arguments callArguments, i *interpreter) (value, error) {
	argThunks := make(bindingFrame, len(arguments.named)+len(arguments.positional))
	parameters := closure.parameters()
	for i, arg := range arguments.positional {
		argThunks[parameters[i].name] = arg
	}

	for _, arg := range arguments.named {
		argThunks[arg.name] = arg.pv
	}

	var calledEnvironment environment

	for _, param := range parameters {
		if _, exists := argThunks[param.name]; !exists {
			argThunks[param.name] = &cachedThunk{
				// Default arguments are evaluated in the same environment as function body
				env:  &calledEnvironment,
				body: param.defaultArg,
			}
		}
	}

	if arguments.tailstrict {
		err := forceThunks(i, &argThunks)
		if err != nil {
			return nil, err
		}
	}

	calledEnvironment = makeEnvironment(
		addBindings(closure.env.upValues, argThunks),
		closure.env.selfBinding,
	)
	return i.EvalInCleanEnv(&calledEnvironment, closure.function.Body, arguments.tailstrict)
}

func (closure *closure) parameters() []namedParameter {
	return closure.params