OpenEuphoria

1. A question about parsing

• Posted by axtens_bruce 1 month ago
• 389 views

So I'd like to create a command line tool that does its parameters the way docker does. I'm getting really tired with GUI planning tools and am designing a CLI one (so that I have TOTAL control).

task <title> (creates a task and returns an id) 
task <id> [dependson <id> ...] 
task <id> [tag <tag> ...] 
task <id> description <description> 

I suppose I'm asking for a formalised way of defining the DSL but I could do that with regexps. It'd be nice to be able to specify the syntax of the DSL to the extent of giving patterns and then having the underlying code either extract the arguments or notify of error.

task "Task Tool" description "Command-line task management tool" tag "cli" tag "euphoria" dependson "HavTim000" 
--> Created task "TasToo000" 

Thoughts?

-Bruce

3. Re: A question about parsing

• Posted by axtens_bruce 1 month ago
• 252 views

So I've noticed that Euphoria has tools for defining and detecting commandline configuration. I'm wondering if there's something similar for DSLs, similar say to, but not as powerful, as a PEG parser.

At the moment, I'm using tokenize_string and pulling out the parts, viz

if length(cl) < 3 then 
    inCli = 1 
    sequence parse = {} 
    while 1 do 
        cl = {} 
        sequence cmd = prompt_string(prompt()) 
        if equal("exit", cmd) then 
            exit  
        end if 
        puts(STDOUT, "\n") 
        sequence tokens = tokenize_string(cmd) 
        parse = tokens[1] 
        for i = 1 to length(parse) do 
            cl = append(cl, parse[i][TDATA]) 
        end for 
        parse_pairs_from(1) 
    end while 
end if 

-Bruce

5. Re: A question about parsing

• Posted by ghaberek (admin) 1 month ago
• 244 views

I think you could accomplish this by defining a set of commands and options, then looking up the main command and dispatching it to cmd_parse() with the associated option set. I can try to throw together a few examples.

-Greg