1" Command to check for the presence of a feature. 2command -nargs=1 CheckFeature call CheckFeature(<f-args>) 3func CheckFeature(name) 4 if !has(a:name) 5 throw 'Skipped: ' .. a:name .. ' feature missing' 6 endif 7endfunc 8 9" Command to check for the presence of a working option. 10command -nargs=1 CheckOption call CheckOption(<f-args>) 11func CheckOption(name) 12 if !exists('+' .. a:name) 13 throw 'Skipped: ' .. a:name .. ' option not supported' 14 endif 15endfunc 16 17" Command to check for the presence of a function. 18command -nargs=1 CheckFunction call CheckFunction(<f-args>) 19func CheckFunction(name) 20 if !exists('*' .. a:name) 21 throw 'Skipped: ' .. a:name .. ' function missing' 22 endif 23endfunc 24