Re: Copying an std.stdio.File into another one

2018-05-21 Thread rikki cattermole via Digitalmars-d-learn 

On 21/05/2018 11:50 PM, 0xEAB wrote:

What's the correct way to copy a `File` into another one in D?

If `LockingTextReader` wasn't undocumented, I'd have gone for that 
approach:



import std.algorithm.mutation : copy;
import std.stdio : File, LockingTextReader;

void main()
{
    auto a = File("a.txt", "r");
    auto b = File("b.txt", "w");

    a.LockingTextReader.copy(b.lockingTextWriter);
}



Side-note:
Although the example code suggest otherwise, I'm not talking about 
copying actual files on disk. In such a case I'd just use 
`std.file.copy` ;)

So, just imagine `a` were `stdout` of process pipe.


Kind regards,
Elias


I would probably start by reading it byChunk and writing it out as a 
rawWrite or something along those lines. That way its using a nice 
buffer (to limit memory usage).

Copying an std.stdio.File into another one

2018-05-21 Thread 0xEAB via Digitalmars-d-learn 

What's the correct way to copy a `File` into another one in D?

If `LockingTextReader` wasn't undocumented, I'd have gone for 
that approach:



import std.algorithm.mutation : copy;
import std.stdio : File, LockingTextReader;

void main()
{
auto a = File("a.txt", "r");
auto b = File("b.txt", "w");

a.LockingTextReader.copy(b.lockingTextWriter);
}



Side-note:
Although the example code suggest otherwise, I'm not talking 
about copying actual files on disk. In such a case I'd just use 
`std.file.copy` ;)

So, just imagine `a` were `stdout` of process pipe.


Kind regards,
Elias