A fun one for the new year :wink: One of the things I really like about Julia is being able to write code how I like (and the surprisingly large number of language decisions I find myself loving). The syntax is natural, I can add or subtract lines and indent however I feel is most appropriate in th…

[image] A most harrowing collection of Julia WATs General Usage Hello all! wave I’ve been collecting a few of the most cursed corner cases of Julia WATs that I know of here (WIP), but I would appreciate if people could share their own rare specimens as well. Please ping …

Wow, that’s a really good list. I never thought of 2e + 1 versus 2e+1 :sweat_smile: It feels like shortform integer-multiplied e and f should just be banned for this reason, or at least throw a warning indicating it’s hazardous to nudge you away from it. Depending on the relative magnitude of e and…

Syntax Surprises More like bugs in the syntax, IMHO. Sure, parsing is hard, and designing a grammar isn’t simple either, but shouldn’t these be fixed eventually? Syntax for one-line, but multi-statement functions is ambiguous indeed: (local a, b = 1, 2; a+b) does look like a tuple and a named …

[image] ForceBru: Why is there no method matching -(::Int64, ::Int64, ::Int64)? I thought the variadic + and * were because they’re associative but afaik subtraction isn’t. I agree on the others.

Correction: julia> Base.operator_associativity(:+) :none julia> Base.operator_associativity(:-) :left

I mean addition and multiplication are associative mathematically and subtraction isn’t. I think that’s a different meaning of associativity than in parsing.

Oops! It skipped my mind that you might be referring to the mathematical property of the operator.

How does this affect the existence of the -(::Int64, ::Int64, ::Int64) method? Since + is associative, (a+b)+c == a+(b+c) and (a+(b+c))+d == a+((b+c)+d) and so on, so I could drop parentheses and simply write a+b+c+d == +(a,b,c,d). Makes sense. Since - is not associative (a-b)-c != a-(b-c), it’s n…

Just a clarification for newcomers that may believe that issue 1 indicates that Julia has a fundamental problem with operator precedence, associativity or commutativity. That is of course not the case. This is a question of how to invoke macros and separate arguments in the call. When a macro is cal…

This would be interesting to consider with GitHub - JuliaLang/JuliaSyntax.jl: A Julia frontend, written in Julia . Ping @c42f

Syntax Surprises

General Usage

jar1 December 31, 2022, 8:07pm 2

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Syntax Surprises

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