What are Nature of the alkali metal oxides(O-2), peroxides (O2-2) and superoxides (O-1/2) in hydrolysis reactions?

 They all act as bronsted base and accept proton from water like,

                                   O​⁻²+ H₂​O_(l)→2OH⁻_(aq)

                       2O₂​⁻+2H₂​O_(l)→2OH⁻_(aq)+H₂​O_2​(l)+O_2​(g)

We know that H+ accepters are base so alkali metal oxides(O-2), peroxides (O₂-2) and superoxides (O-1/2) are abstract proton from water so they are Bronsted base. 

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