Crystal中带有命名参数的重载方法？

【问题标题】：Overload method with named arguments in Crystal?Crystal中带有命名参数的重载方法？
【发布时间】：2019-12-19 18:18:16
【问题描述】：

如果参数名称相同，是否可以重载方法？

def inspect(url : String); inspect_url(url) end
def inspect(path : String); inspect_path(path) end

# Always will be called with explicit names
inspect url: "some url"
inspect path: "some path"

# Never without names, this form is not needed 
# and never will be used
inspect "something"

【问题讨论】：

标签： crystal-lang

【解决方案1】：

splat 参数后的参数只能作为命名参数传递。典型用法是有一个未命名的 splat 参数，后跟命名参数。

def inspect(*, url : String)
  "inspect url"
end

def inspect(*, path : String)
  "inspect path"
end

inspect url: "some url"   # => "inspect url"
inspect path: "some path" # => "inspect path"

inspect "something" # Invalid number of arguments

【讨论】：