[erlang-questions] Luerl - Lua in Erlang

Robert Virding <>
Mon Feb 20 15:18:52 CET 2012


3> You need to compile both the .yrl and .xrl file. 

If you start erlang in the luerl top directory with : 

erl -pa ebin 
... 
1> yecc:file("src/luerl_parse"). 
src/luerl_parse.yrl: Warning: conflicts: 2 shift/reduce, 0 reduce/reduce 
{ok,"src/luerl_parse.erl"} 
2> leex:file("src/luerl_scan"). 
{ok,"src/luerl_scan.erl"} 
3> make:all([load]). 
... 
up_to_date 
4> 

- The -pa ebin is to make sure it finds all the .beam files in ebin. 
- Both yecc and leex by default put their generated .erl files in the same directory as the .yrl and .xrl source files. 
- The Emakefile contains data for compiling all the .erl files in src and putting them in ebin. 

I added lines in .gitignore to exclude the generated luerl_parse/scan.erl files as small changes in the source files can cause big changes in the .erl files. That was probably a mistake and I will revert it next commit. 

Robert 

----- Original Message -----

> On 2/20/12 3:38 AM, Robert Virding wrote:
> > ----- Original Message -----
> 
> > > On 19 February 2012 00:32, Robert Virding
> > > <> wrote:
> > 
> 
> > > > Report bugs and missing features.
> > > 
> > 
> 
> I don't get it to run. I tried basically:

> mkdir ebin
> erl
> 1> yecc:file("luerl_parse.yrl").
> erl -make
> erl
> 2> luerl:eval(<<"Hello Robert!">>).
> ** exception error: undefined function luerl_scan:string/1
> in function luerl:eval/1

> Need I compile the .xrl?

> > What is also needed is a good interface between erlang and Lua.
> 
> What requirements would a good interface meet?

> Henning
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