🔰statement

🚧 施工中

Swift ⟩ statement

Swift code consists of statements.

🔴 主題

• syntax features

  • semicolon (;)

• kinds of statements

  • simple statement - consists of

    • an expression ⭐️ (evaluated to a value)

    • or a declaration ⭐️ (define new variable or type)

  • flow control

    • loop

    • branch

    • control transfer

      • break, continue, fallthrough, throw, return 🚧

  • compiler control statement

    • conditional compilation block (#if ... #endif) 🚧

    • line control statement (#sourceLocation) 🚧

    • compile-time diagnostic statement (#error, #warning) 🚧

  • other statements

    • do statement

    • defer statement 🚧

    • labeled statement 🚧

    • availability condition (#available, ...) 🚧

🔸 定義

GRAMMAR OF A STATEMENT

• statement →

  • expression ;opt

  • declaration ;opt

  • loop-statement ;opt

  • branch-statement ;opt

  • labeled-statement ;opt

  • control-transfer-statement ;opt

  • defer-statement ;opt

  • do-statement ;opt

  • compiler-control-statement

• statements → statement statements opt

📘 手冊

• Statements