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Coroutines in C++

System programmers and complier writes use coroutines for a long time. Most compilers separate lexical and syntax analysis and the most natural way of communicate between them is to use a co-routine linkage. In the most common scenario parser can call lexer for more tokens (look ahead) and then ask to proceed from the token that was last retrieved before look-ahead. The simplest implementation of co-routines in C+= is to use threads. For example in Solaris one can use POSIX threads and in Windows "fibers"( user threads that are not preemptively scheduled). for details see the paper  DDJ CROSS-PLATFORM COROUTINES IN C++ by George F. Frazier:

Coroutines are a natural solution to parsing problems used by assembly-language programmers. George presents a cross-platform coroutine technique for C++. Additional resources include cppco.txt (listings) and cppco.zip (source code).

There are also libraries that provide this extension.

Recommended Links

DDJ CROSS-PLATFORM COROUTINES IN C++ by George F. Frazier

A Portable C++ Library for Coroutine Sequencing - Keld Helsgaun Mail 

Programmers Heaven - C - C++ Zone - Various Source - CCL110JF.ZIP Download page Class Coroutine: an abstract base class for DOS coroutines.

C++ Library Reference- 2 - The Coroutine Library

Coroutine examples from ch 2 course notes. in CS 342 Control Structures


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