leque / esexpr

a toy subset grammar for Emacs Lisp like S-expression

esexpr.hh

Version

0.0.0

Introduction

Esexpr is a toy subset grammar for Emacs Lisp like S-expression written with PEGTL.

This grammar supports parsing:

• proper lists
• vectors
• strings
• characters
• floating point numbers
• integers (decimal, hexadecimal, binary)
• symbols
• quotes
• circular-objects
• comments

and does not support:

• dotted-pairs (improper lists)
• octal integers and radix-n integers
• infinities and NaNs
• backquotes

NB: Strings and characters parser may be overly permissive for escape sequences.

Requirements

• C++ 11
• PEGTL 1.3.1
• cmake

How to use

#include <esexpr.hh>

Compile and Run Examples

% mkdir -p build
% cd build
% cmake ..
% make
% cd exapmles
% ./example -f example.el

Run Tests

% mkdir -p build
% cd build
% cmake ..
% env CTEST_OUTPUT_ON_FAILURE=1 make all test