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56 lines
1.5 KiB
Plaintext
56 lines
1.5 KiB
Plaintext
module std::sort;
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macro usz @len_from_list(&list)
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{
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$if $defined(list.len()):
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return list.len();
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$else
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return list.len;
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$endif
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}
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macro bool @is_sortable(#list)
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{
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$switch
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$case !$defined(#list[0]):
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return false;
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$case !$defined(#list.len):
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return false;
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$case $defined(&#list[0]) &&& !types::is_same($typeof(&#list[0]), $typeof(#list[0])*):
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return false;
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$default:
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return true;
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$endswitch
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}
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macro bool @is_valid_context(#cmp, #context)
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{
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return @is_valid_macro_slot(#cmp) || @is_empty_macro_slot(#context);
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}
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macro bool @is_valid_cmp_fn(#cmp, #list, #context)
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{
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var $Type = $typeof(#cmp);
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var $no_context = @is_empty_macro_slot(#context);
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$switch
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$case @is_empty_macro_slot(#cmp): return true;
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$case $Type.kindof != FUNC ||| $Type.returns.kindof != SIGNED_INT: return false;
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$case $defined(#cmp(#list[0], #list[0], #context)): return true;
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$case $defined(#cmp(#list[0], #list[0])): return $no_context;
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$case $defined(#cmp(&#list[0], &#list[0], #context)): return true;
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$case $defined(#cmp(&#list[0], &#list[0])): return $no_context;
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$default: return false;
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$endswitch
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}
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macro bool @is_cmp_key_fn(#key_fn, #list)
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{
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$switch
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$case @is_empty_macro_slot(#key_fn): return true;
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$case $typeof(#key_fn).kindof != FUNC: return false;
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$case $typeof(#key_fn).returns.kindof != UNSIGNED_INT: return false;
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$case $defined(#key_fn(#list[0])): return true;
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$case $defined(#key_fn(&&(#list[0]))): return true;
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$default: return false;
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$endswitch
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} |