Finding a object in a HASH_TABLE using item feature on EIFFEL -


i having problem comparing 2 objects in hash_table

person class attributes such name, b-day, status of relationship, spouse name, spouse id. composed of attributes code:

list: hash_table[person, integer_64]  put(id1, id2: integer_64) local    p1, p2: person    p1 := model.list.at(id)       -- or     p1 := model.list.search(id)    p1 := model.list.found_item -- same error below end

error: source of assignment not compatible target.

the features used return "detachable g"

i think should doing "if attached" ensure item feature returns correct object type , assign? i'm not sure how cast object though.

the error triggered calling above feature

the reason need these functions work can sort easier

the features return detachable g because possible no element found. therefore need use object tests, e.g.

if    attached model.list [id1] p1 ,    attached model.list [id2] p2    ... -- use p1 , p2 end

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