Doubly-linked list/Element definition: Difference between revisions
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=={{header|Phix}}== |
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In Phix, types are used for validation and debugging rather than specification purposes. For extensive run-time checking you could use |
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<lang Phix>enum NEXT,PREV,DATA |
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type slnode(object x) |
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return (sequence(x) and length(x)=DATA and <i>udt</i>(x[DATA]) and integer(x[NEXT] and integer(x[PREV])) |
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end type</lang> |
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But more often you would just use the builtin sequences. See also [[Singly-linked_list/Element_definition#Phix|Singly-linked_list/Element_definition]]. |
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Memory is automatically reclaimed the moment items are no longer needed. |
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=={{header|PL/I}}== |
=={{header|PL/I}}== |
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