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19 lines
795 B
Plaintext
19 lines
795 B
Plaintext
#define LAZYINITLIST(L) if (!L) L = list()
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#define UNSETEMPTY(L) if (L && !L.len) L = null
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#define LAZYREMOVE(L, I) if(L) { L -= I; if(!L.len) { L = null; } }
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#define LAZYADD(L, I) if(!L) { L = list(); } L += I;
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#define LAZYACCESS(L, I) (L ? (isnum(I) ? (I > 0 && I <= L.len ? L[I] : null) : L[I]) : null)
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#define LAZYLEN(L) length(L)
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#define LAZYCLEARLIST(L) if(L) L.Cut()
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#define LAZYSET(L, K, V) if (!L) { L = list(); } L[K] = V;
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#define LAZYPICK(L,DEFAULT) (LAZYLEN(L) ? pick(L) : DEFAULT)
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#define LAZYISIN(L, I) (L ? (I in L) : FALSE)
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#define LAZYDISTINCTADD(L, I) if(!L) { L = list(); } L |= I;
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// Shims for some list procs in lists.dm.
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#define islist(L) istype(L,/list)
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#define isemptylist(L) (!LAZYLEN(L))
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#define safepick(L) LAZYPICK(L,null)
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#define listgetindex(L,I) LAZYACCESS(L,I)
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