Re: Nested function declarations

[wrzosk]

On 28.01.2011 03:35, Akakima wrote:

"bearophile"<bearophileh...@lycos.com>  a �crit dans le message de news:
iht0ha$2avd$1...@digitalmars.com...

This D2 code:

import std.math: sqrt;
void main() {
    double sqrt();
    double result = sqrt(9.0);
}

Generates the errors:
test.d(4): Error: function test.main.sqrt () is not callable using
argument types (double)
test.d(4): Error: expected 0 arguments, not 1 for non-variadic function
type double()

--- This one compiles, but does not link:

import std.math: sqrt;
void main()
{
   double sqrt(double x);
   double result = sqrt(9.0);
}


--- And this one compiles and links ok.

import std.math: sqrt;
void main()
{
   double sqrt(double x)  {    return 1.0;  }
   double result = sqrt(9.0);
}

So, with the appropriate prototype it compiles, but
there is a conflict with the sqrt() already defined in Phobos.

This works:

import std.math: sqrt;
import std.stdio;
void main()
{
  double sqrt(double x)  {    return 1.0;  }
  double result = .sqrt(9.0);
  writeln(result);
}