95 lines
2.2 KiB
Markdown
95 lines
2.2 KiB
Markdown
# Mumble: A lisp in C
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## About
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This is a Lisp written in C. It follows the outline in this [Build Your Own Lisp](https://buildyourownlisp.com/chapter11_variables) book, though it then adds some small tweaks and improvements and quality of life improvements:
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- A makefile
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- Configurable verbosity levels
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- Different and perhaps slightly more elegant printing functions
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- A slightly different approach to evaluating functions
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- Capturing Ctrl+D
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- Float instead of ints
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Conversely, it doesn't have:
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- Function currying
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- strings
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- Variable arguments
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- ...
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Overall this might be mostly of interest as a pointer to the book that this is originally based on. And to readers of that same book, I'd be curious to see what you ended up with.
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## Installation and usage
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### Dependencies
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This depends on [editline](https://github.com/troglobit/editline), which can be installed on Debian/Ubuntu with:
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```
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git clone https://github.com/troglobit/editline
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./autogen.sh
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./configure
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make all
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sudo make install
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ldconfig
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```
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Readers might also find it interesting to compile it with [tiny c compiler](https://bellard.org/tcc/) rather than gcc, as it is significantly faster.
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### Compilation
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```
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git clone https://github.com/NunoSempere/mumble
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make
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# sudo make install #
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```
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### Usage
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Simply call the `./mumble` binary:
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```
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./mumble
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```
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## Example usage
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```
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mumble> (1 2 3)
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mumble> { 1 2 3 }
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mumble> head (1 2 3)
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mumble> { head (1 2 3) }
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mumble> tail { 1 2 3 }
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mumble> list ( 1 2 3 )
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mumble> eval { head {1 2 3} }
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mumble> (eval { head {+ tail head } } ) 1 2 3
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mumble> len {1 2 3}
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mumble> join { {1 2} {3 4} }
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mumble> def {x} { 100 }
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mumble> x
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mumble> def { a b c } { 1 2 3}
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mumble> * a b c
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mumble> - a b c
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mumble> / a b c
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mumble> VERBOSITY=0
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mumble> VERBOSITY=1
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mumble> VERBOSITY=2
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mumble> def {plus} {(@ {x y} {+ x y})}
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( )
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mumble> plus
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( @ { x y } { + x y } )
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mumble> eval {plus 1 2}
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3.000000
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```
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## Gotchas
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This doesn't currently run on Windows. But it easily could, with [preprocessor statements from the book].
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## Usage and licensing
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I don't expect this project to be such that people might want to use it. If you want a
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But for the eventuality, this code is licensed under the MIT license; see the license.txt file.
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