| 1 | .sub 'choose' |
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| 2 | .param pmc options :slurpy |
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| 3 | .local pmc cc |
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| 4 | .local pmc chosen |
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| 5 | .local pmc paths |
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| 6 | |
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| 7 | if options goto got_options |
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| 8 | 'fail'() |
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| 9 | got_options: |
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| 10 | chosen = shift options |
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| 11 | |
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| 12 | cc = new 'Continuation' |
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| 13 | set_addr cc, recurse |
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| 14 | paths = get_global '!paths' |
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| 15 | push paths, cc |
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| 16 | |
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| 17 | .return (chosen) |
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| 18 | |
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| 19 | recurse: |
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| 20 | .tailcall 'choose'(options :flat) |
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| 21 | .end |
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| 22 | |
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| 23 | .sub 'fail' |
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| 24 | .local pmc cc |
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| 25 | .local pmc paths |
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| 26 | |
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| 27 | paths = get_global '!paths' |
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| 28 | cc = pop paths |
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| 29 | |
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| 30 | cc() |
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| 31 | .end |
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| 32 | |
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| 33 | .sub 'main' :main |
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| 34 | .local pmc cc |
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| 35 | .local pmc paths |
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| 36 | .local pmc val |
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| 37 | |
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| 38 | paths = new 'ResizablePMCArray' |
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| 39 | set_global '!paths', paths |
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| 40 | |
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| 41 | cc = new 'Continuation' |
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| 42 | push paths, cc |
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| 43 | set_addr cc, final_failure |
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| 44 | |
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| 45 | val= 'choose'("foo", "bar") |
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| 46 | say val |
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| 47 | |
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| 48 | 'fail'() |
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| 49 | final_failure: |
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| 50 | say 'Done.' |
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| 51 | .end |
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