auto a = map!((a)=>2*a)(iota(10)); Appears to do exactly what is says on the can. However, whilst:
auto threads = new Thread [ numberOfThreads ] ; foreach ( i ; 0 .. numberOfThreads ) { auto closedPartialSum ( ) { immutable ii = i ; return delegate ( ) { partialSum ( ii , sliceSize , delta ) ; } ; } threads[i] = new Thread ( closedPartialSum ) ; } foreach ( thread ; threads ) { thread.start ( ) ; } works fine: auto threads = map ! ( ( int i ) { auto closedPartialSum ( ) { immutable ii = i ; return delegate ( ) { partialSum ( ii , sliceSize , delta ) ; } ; } return new Thread ( closedPartialSum ) ; } ) ( iota ( numberOfThreads ) ) ; foreach ( thread ; threads ) { thread.start ( ) ; } causes a SIGSEGV: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff73af700 (LWP 8840)] 0x000000000044f8a5 in pi_d_threadsGlobalState_array_declarative.execute() (this=0x7ffff7ed1fe0) at pi_d_threadsGlobalState_array_declarative.d:39 39 return delegate ( ) { partialSum ( ii , sliceSize , delta ) ; } ; This is with dmd 2.059 and so not a 2.060 thing. Nudges in the right direction most welcome. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:russel.win...@ekiga.net 41 Buckmaster Road m: +44 7770 465 077 xmpp: rus...@winder.org.uk London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder
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