On Monday, 2 May 2016 at 16:39:13 UTC, vino wrote:
Hi All,
I am a newbie for D programming and need some help, I am
trying to write a program using the example given in the book
The "D Programming Language" written by "Andrei Alexandrescu"
with few changes such as the example program read the input
from stdin and prints the data to stdout, but my program reads
the input from the file(readfile.txt) and writes the output to
another file(writefile.txt), and I am getting the below errors
while compiling
Error:
[root@localhost DProjects]# dmd readwriteb.d
readwriteb.d(7): Error: cannot implicitly convert expression
(__aggr2859.front()) of type ubyte[] to immutable(ubyte)[]
readwriteb.d(15): Error: cannot implicitly convert expression
(receiveOnly()) of type immutable(ubyte)[] to
std.outbuffer.OutBuffer
[root@localhost DProjects]#
Version: DMD64 D Compiler v2.071.0
Code:
import std.algorithm, std.concurrency, std.stdio,
std.outbuffer, std.file;
void main() {
enum bufferSize = 1024 * 100;
auto file = File("readfile.txt", "r");
auto tid = spawn(&fileWriter);
foreach (immutable(ubyte)[] buffer;
file.byChunk(bufferSize)) {
send(tid, buffer);
}
}
void fileWriter() {
auto wbuf = new OutBuffer();
for (;;) {
wbuf = receiveOnly!(immutable(ubyte)[])();
write("writefile.txt", wbuf);
}
}
From,
Vino.B
File.byChunks iirc returns a mutable ubyte[] range, not an
immutable(ubyte)[]. The easiest way to fix this would be to
change the foreach variable to ubyte[] and make an immutable
duplicate of it when sending via idup.
wbuf is inferred to be an OutBuffer but then you assign an
immutable(ubyte)[] to it in your foreach loop; a type error.
