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Map.keys() and .values() parallel iterators? #24056

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cassella opened this issue Dec 9, 2023 · 1 comment · May be fixed by #26519
Open

Map.keys() and .values() parallel iterators? #24056

cassella opened this issue Dec 9, 2023 · 1 comment · May be fixed by #26519
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area: Libraries / Modules type: Feature Request

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@cassella
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cassella commented Dec 9, 2023 •
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Summary of Problem

A forall loop over a map's keys() or values() iterator fails to compile.

Steps to Reproduce

Source Code:

use Map;

var m: map(int, int);

for i in 1..100 do m[i] = i;

var s = 0;
forall k in m.keys() with (+ reduce s) do s += k;
writeln(s);

Compile command:
chpl foo.chpl

foo.chpl:1: In module 'foo':
foo.chpl:8: error: A standalone or leader iterator is not found for the iterable expression in this forall loop

Ditto for m.values().

Associated Future Test(s):

None yet

Configuration Information

chpl version 1.33.0
  built with LLVM version 14.0.0
(really, today's main)

gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0

Ubuntu clang version 14.0.0-1ubuntu1.1

CHPL_TARGET_PLATFORM: linux64
CHPL_TARGET_COMPILER: llvm
CHPL_TARGET_ARCH: x86_64
CHPL_TARGET_CPU: native *
CHPL_LOCALE_MODEL: flat
CHPL_COMM: gasnet *
  CHPL_COMM_SUBSTRATE: udp
  CHPL_GASNET_SEGMENT: everything
CHPL_TASKS: qthreads
CHPL_LAUNCHER: amudprun
CHPL_TIMERS: generic
CHPL_UNWIND: none
CHPL_MEM: jemalloc
CHPL_ATOMICS: cstdlib
  CHPL_NETWORK_ATOMICS: none
CHPL_GMP: bundled
CHPL_HWLOC: bundled
CHPL_RE2: none
CHPL_LLVM: system
CHPL_AUX_FILESYS: none
@cassella cassella changed the title Map.keys() parallel iterator? Map.keys() and .values() parallel iterators? Dec 9, 2023
@bradcray
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bradcray commented Dec 9, 2023

Boy, sure looks like they don't (and haven't since Map was introduced).

@jabraham17 jabraham17 linked a pull request Jan 14, 2025 that will close this issue
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Add parallel iterators for map.keys and map.values jabraham17/chapel
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@cassella @bradcray