/* -----------------------------------------------------------------------------
Copyright 2020 Kevin P. Barry

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
----------------------------------------------------------------------------- */

// Author: Kevin P. Barry [ta0kira@gmail.com]

testcase "multi return to call" {
  error
  require "call.+\{Value,Value\}"
}

@value interface Value {
  get () -> (Value,Value)
  call () -> ()
}

define Test {
  @value process (Value) -> ()
  process (value) {
    \ value.get().call()
  }

  run () {}
}

concrete Test {
  @type run () -> ()
}


testcase "zero return to call" {
  error
  require "call.+\{\}"
}

@value interface Value {
  get () -> ()
  call () -> ()
}

define Test {
  @value process (Value) -> ()
  process (value) {
    \ value.get().call()
  }

  run () {}
}

concrete Test {
  @type run () -> ()
}


testcase "multi return assign" {
  success Test$run()
}

define Test {
  @type create () -> (Test)
  create () {
    return Test{}
  }

  @value double () -> (Test,Test)
  double () {
    return self, self
  }

  run () {
    Test value <- create()
    _, Test value2 <- value.double()
    value, _ <- value2.double()
  }
}

concrete Test {
  @type run () -> ()
}


testcase "multi return as args" {
  success Test$run()
}

define Test {
  @type get () -> (Int,Int)
  get () {
    return 1, 2
  }

  @type call (Int,Int) -> ()
  call (x,y) {
    if (x != 1) {
      fail("Failed")
    }
    if (y != 2) {
      fail("Failed")
    }
  }

  run () {
    \ call(get())
  }
}

concrete Test {
  @type run () -> ()
}