Scala-Continuation

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Chapter22.

제한된 컨티뉴에이션

Agenda
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What is the Continuation
Capture & Call
Holes in Calculation
Reset and the Shift Of Control Flow
Reset the value of expression
The type of reset and shift expression
@CPS & Convert CPS
Convert recursive function to @
Return IOC
Context switching overlap Control

What is the Continuation
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익숙한 분기 , 루프 ,
함수 호출 , 예외 이외
의 제어 흐름 메커니
즘을 구현할수 있게
해주는 강력 한 구문
라이브러리 구현자들
을 위한 기능

Reset & the Shift & Control Flow
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Shift

캡쳐시 사용하는 함수

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Reset
Continuation 의 제한 범위



Calc
k 의 값을 구멍으로 생각해
계산



Control Flow

# 순서에 맞게 호출됨
결과는 //2,//3 중에 결

The type of reset
and shift expression
&
Reset the
value of expression

@CPS & Convert CPS



컨티뉴에이션이 런타임 스택의 스냅샷으로 구현 => JVM 은
스택 조작 허용 안함
CPS 를 통해 해결

( 컨티뉴에이션 - 패싱 - 스타일 ) * shift => ControlContext[+A,-B,+C]
*
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Reset 블록 내에 @ 표시
변환된 코드는 스칼라 코드와 혼합 안됨 ..
따라서 반드시 변환된 메소드로 어노테이트 해야함

Convert recursive function to @
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

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ProcessDirectory Call
Shift 블록에 진입
Reset 블록의 끝으로
점프
For 문을 통해 cont 함
수 실행
Shift 구멍으로 들어가
서 재귀를 실행
재귀 함수 실행

For 문 사용 X
=> while 사용

Return IOC



웹 애플리케이션에서 제어권이 필요한 경우 사용
순서가 필요한 상황에서 사용

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Scala-Continuation

1. Scala Study -봉 성 주- Chapter22. 제한된 컨티뉴에이션

2. Agenda           What is the Continuation Capture & Call Holes in Calculation Reset and the Shift Of Control Flow Reset the value of expression The type of reset and shift expression @CPS & Convert CPS Convert recursive function to @ Return IOC Context switching overlap Control

3. What is the Continuation   익숙한 분기 , 루프 , 함수 호출 , 예외 이외 의 제어 흐름 메커니 즘을 구현할수 있게 해주는 강력 한 구문 라이브러리 구현자들 을 위한 기능

4. Reset & the Shift & Control Flow  Shift 캡쳐시 사용하는 함수  Reset Continuation 의 제한 범위  Calc k 의 값을 구멍으로 생각해 계산  Control Flow # 순서에 맞게 호출됨 결과는 //2,//3 중에 결

5. The type of reset and shift expression & Reset the value of expression

6. @CPS & Convert CPS   컨티뉴에이션이 런타임 스택의 스냅샷으로 구현 => JVM 은 스택 조작 허용 안함 CPS 를 통해 해결 ( 컨티뉴에이션 - 패싱 - 스타일 ) * shift => ControlContext[+A,-B,+C] *   Reset 블록 내에 @ 표시 변환된 코드는 스칼라 코드와 혼합 안됨 .. 따라서 반드시 변환된 메소드로 어노테이트 해야함

7. Convert recursive function to @        ProcessDirectory Call Shift 블록에 진입 Reset 블록의 끝으로 점프 For 문을 통해 cont 함 수 실행 Shift 구멍으로 들어가 서 재귀를 실행 재귀 함수 실행 For 문 사용 X => while 사용

8. Return IOC   웹 애플리케이션에서 제어권이 필요한 경우 사용 순서가 필요한 상황에서 사용

9. Context switching overlap Control

10. Context switching overlap Control

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