On 03/06/2011 02:43 PM, Russel Winder wrote:
I have a code fragment:
auto threads = new Thread[numberOfThreads] ;
foreach ( i ; 0 .. numberOfThreads ) {
void delegate ( ) closedPartialSum ( ) {
immutable id = i ;
return ( ) { partialSum ( id , sliceSize , delta ) ; } ;
}
threads[i] = new Thread ( closedPartialSum ) ;
}
which clearly should be doable using map from std.algorithm. So I
tried:
auto threads = map ! ( function Thread ( int i ) {
void delegate ( ) closedPartialSum ( ) {
immutable id = i ;
return ( ) { partialSum ( id , sliceSize , delta ) ; } ;
}
return new Thread ( closedPartialSum ) ;
} ) ( 0 .. numberOfThreads )
which fails:
pi_d2_threadsGlobalState.d(41): found '..' when expecting ','
pi_d2_threadsGlobalState.d(57): semicolon expected following auto
declaration, not 'foreach'
So clearly 0 .. numberOfThreads only means a range of integers in a
foreach or array index only and not everywhere as it does in all
sensible languages :-((
I am clearly missing something, anyone any ideas?
Without trying to study the code's detainls: "( 0 .. numberOfThreads )" has
very few chances to be accepted by the parser ;-)
Note: there is no interval literal in D. Instead uses of i..j in slicing and
foreach both are pure syntactic honey.
Denis
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