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run code in 150+ php & hhvm versions
Bugs & Features
<?php function genmer($gens) { foreach($gens as $gen) { while($gen->valid()) { yield $gen->current(); $gen->next(); } } } function gen_one_to_three() { for ($i = 1; $i <= 3; $i++) { // Note that $i is preserved between yields. yield $i; } } $on = gen_one_to_three(); $two = gen_one_to_three(); $three = gen_one_to_three(); $merged = genmer([$on, $two, $three]); foreach($merged as $m) { var_dump($m); }
Output for 5.5.0 - 5.6.28, hhvm-3.12.0 - 3.13.2, 7.0.0 - 7.1.0
int(1) int(2) int(3) int(1) int(2) int(3) int(1) int(2) int(3)
Output for hhvm-3.10.0
Fatal error: Uncaught exception 'Exception' with message 'Need to call next() first' in /in/OMMEA:6 Stack trace: #0 /in/OMMEA(6): Generator->current() #1 (): genmer() #2 (): Generator->next() #3 /in/OMMEA(27): Generator->rewind() #4 {main}
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$gen' (T_VARIABLE) in /in/OMMEA on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_VARIABLE in /in/OMMEA on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_VARIABLE in /in/OMMEA on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/OMMEA on line 6
Process exited with code 255.