RE: fun with table constructors

[Luiz Carlos de Castro Silveira Filho <luiz@...>]

> 
> f 3  => f(3)
> 
> then we could write
> 
> function plus(a) return function (b) return %a + b end end
> 
> plus 3 4
> 
> ...but this is not legal syntax. You have to write plus(3), 
> and then can't
> apply the result directly to 4, so you need:
> 
> a = plus(3)
> a(4)
> 

You can do that by changing two sections of the code ('lparser.c'):

first is in function 'var_or_func', line 457: add the line
      case TK_NUMBER:

second, in function 'funcargs', line 412, add the lines
    case TK_NUMBER: {  /* funcargs -> NUMBER */
      Number r = ls->t.seminfo.r;
      next(ls);
      luaK_number(fs, r);
      break;
    }

to test, just a little change in your example:

function plus(a) return function (b) print (%a + b) end end
plus 3 4


I'm changing the parser and doing things similar to these.
I have a question to the Lua experts: do changes like these break the
grammar ?

Luiz.