Typestate

What is Typestate?

Type-system technique where types encode an object's state so invalid operations can be rejected at compile time

In other languages

한국어타입상태

객체나 값의 가능한 상태를 타입으로 표현해 잘못된 상태 전이를 컴파일 단계에서 막는 기법이다.

日本語型状態

オブジェクトや処理の状態を型で表し、許される操作をコンパイル時に制約する設計手法。

Related Terms

• Static type systemProgramming language feature that checks variable and expression types before a program runs, usually during compilation
• EnumData type whose allowed values come from a fixed named set, often used to restrict program states
• Type hintingA way to annotate code with the expected data types of variables and functions to improve readability and catch errors earlier.
• Type CheckerA program that verifies the data types of variables and functions in code to prevent logic errors and ensure consistency before the code is executed.
• Duck-typingA programming concept where an object's suitability is determined by the presence of certain methods or attributes rather than its actual type
• Semantic AnalysisA phase in the compilation process where the compiler enforces language rules such as type checking, scope resolution, and variable declaration constraints.
• InvariantCondition that must remain true across operations or system states for software to be considered correct
• Runtime stateThe values, memory, and execution conditions present while software is running