. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 16.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Core task operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 29 Parallel Computing 273 30 Coroutines 275 30.1 Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 16.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Core task operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 29 Parallel Computing 273 30 Coroutines 275 30.1 Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 16.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 Core task operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 29 Parallel Computing 273 30 Coroutines 275 30.1 Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 21.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 Core task operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 34 Parallel Computing 285 35 Coroutines 287 35.1 Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 9.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Scope of fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for Evaluation: Loops: while and for. • Exception Handling: try-catch, error and throw. • Tasks (aka Coroutines): yieldto. The first five control flow mechanisms are standard to high-level programming languages

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 9.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Scope of fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for Evaluation: Loops: while and for. • Exception Handling: try-catch, error and throw. • Tasks (aka Coroutines): yieldto. The first five control flow mechanisms are standard to high-level programming languages

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 9.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Scope of fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for Evaluation: Loops: while and for. • Exception Handling: try-catch, error and throw. • Tasks (aka Coroutines): yieldto. The first five control flow mechanisms are standard to high-level programming languages

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 9.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Scope of fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for Evaluation: Loops: while and for. • Exception Handling: try-catch, error and throw. • Tasks (aka Coroutines): yieldto. The first five control flow mechanisms are standard to high-level programming languages

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 9.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 10 Scope of Variables 105 fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for Evaluation: Loops: while and for. • Exception Handling: try-catch, error and throw. • Tasks (aka Coroutines): yieldto. The first five control flow mechanisms are standard to high-level programming languages

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 9.6 Tasks (aka Coroutines) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 10 Scope of Variables 105 fast • Designed for parallelism and distributed computation • Lightweight "green" threading (coroutines) • Unobtrusive yet powerful type system • Elegant and extensible conversions and promotions for Evaluation: Loops: while and for. • Exception Handling: try-catch, error and throw. • Tasks (aka Coroutines): yieldto. The first five control flow mechanisms are standard to high-level programming languages