JuliaCollections / JuliaCollections/DataStructures.jl
Heterogeneous multi dict
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Description
I can do
Dict(1 => 1, 2=> "two")
but
using DataStructures
MultiDict(1 => 1, 2 => "two")
throws an error:
LoadError: MethodError: no method matching DataStructures.MultiDict{K,V}(::Pair{Int64,Int64}, ::Pair{Int64,String})
Closest candidates are:
DataStructures.MultiDict{K,V}{K,V}(!Matched::Pair{K,V}...) at /home/jan/.julia/v0.6/DataStructures/src/multi_dict.jl:36
DataStructures.MultiDict{K,V}(::Any) at /home/jan/.julia/v0.6/DataStructures/src/multi_dict.jl:20
DataStructures.MultiDict{K,V}{T}(::Any) at sysimg.jl:66
while loading In[27], in expression starting on line 2
is this expected?
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Research direction
Start with the MultiDict constructor in DataStructures/src/multi_dict.jl, especially the method reported at line 36, and compare it with Julia's Dict constructor behavior. Reproduce the heterogeneous Pair example and determine whether MultiDict should accept it; done means the expected constructor behavior is covered and verified.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- data
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100