because it is not recognized/parsed as literal but as the application of a unary minus, which has lower precedence than ^
I guess it is not possible to give binary minus a lower precedence than ^ and unary minus of higher precedence, since these are just different methods of the same function/operator. Op donderdag 18 september 2014 14:54:26 UTC+2 schreef Florian Oswald: > > yes - not sure why -0.4 and (-0.4) are any different. > > On 18 September 2014 13:52, Patrick O'Leary <[email protected] > <javascript:>> wrote: > >> Seems like the literal -0.4^2.5 should throw the same error, though? >> >> >> On Thursday, September 18, 2014 6:42:56 AM UTC-5, Tim Holy wrote: >>> >>> http://docs.julialang.org/en/latest/manual/faq/#why-does- >>> julia-give-a-domainerror-for-certain-seemingly-sensible-operations >>> >>> On Thursday, September 18, 2014 03:24:00 AM Florian Oswald wrote: >>> > # define a variable gamma: >>> > >>> > gamma = 1.4 >>> > mgamma = 1.0-gamma >>> > >>> > julia> mgamma >>> > -0.3999999999999999 >>> > >>> > # this works: >>> > >>> > julia> -0.399999999999^2.5 >>> > -0.10119288512475567 >>> > >>> > # this doesn't: >>> > >>> > julia> mgamma^2.5 >>> > ERROR: DomainError >>> > in ^ at math.jl:252 >>> >>> >
