README.md

flex-bison-example

A reentrant example parser with custom parameters with flex/bison

Install prerequisites. On Debian-based Linuxes, like:

$ apt-get install -y build-essential flex bison

Build using the Makefile

$ make

then run like so:

$ out/calc

Exit the calculator with exit command or Ctrl-D.

Difference from meyerd/flex-bison-example

This fork of meyerd/flex-bison-example adds:

• reentrant parser
• pass custom parameters to parser and lexer
• get custom data back from parser and lexer
• print line number in error messages
• compile source files individually, then link (as you would do in a larger code base)
• separate sources and generated files into src and out dirs

Resources

Helpful links that I used:

• Make a reentrant parser with Flex and Bison
• The Flex Manual
• The Bison Manual
• Configuring Bison and Flex without global or static variable