Check if input to macro is a vector
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I would like to check if the input to a macro is an vector and raise an exception if it is not. Currently, I have come up with this. Is there an idiomatic way of doing this?
macro doarray(arr)
if in(:head, fieldnames(typeof(arr))) && arr.head == :vect
println("Do Something")
else
throw(ArgumentError("$(arr) should be a vector"))
end
end
julia-lang
asked Nov 22 at 17:33
RAbraham
2,49722542
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up vote
0
down vote
favorite
I would like to check if the input to a macro is an vector and raise an exception if it is not. Currently, I have come up with this. Is there an idiomatic way of doing this?
macro doarray(arr)
if in(:head, fieldnames(typeof(arr))) && arr.head == :vect
println("Do Something")
else
throw(ArgumentError("$(arr) should be a vector"))
end
end
julia-lang
asked Nov 22 at 17:33
RAbraham
2,49722542
2
If you want to allow only[A, B, C, ...]like syntax then you have to look for:vectin head as you write as far as I know. However, you can construct a vector also usingvcatlike this[1;2;3]and this pattern will not cover this (butvcatalso can produce something else than a vector so the case is messy here).
– Bogumił Kamiński
Nov 22 at 17:52
2
Also take a look at Macrotools.jl. You can match against[a__].
– 张实唯
Nov 23 at 2:08
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I would like to check if the input to a macro is an vector and raise an exception if it is not. Currently, I have come up with this. Is there an idiomatic way of doing this?
macro doarray(arr)
if in(:head, fieldnames(typeof(arr))) && arr.head == :vect
println("Do Something")
else
throw(ArgumentError("$(arr) should be a vector"))
end
end
julia-lang
asked Nov 22 at 17:33
RAbraham
2,49722542
I would like to check if the input to a macro is an vector and raise an exception if it is not. Currently, I have come up with this. Is there an idiomatic way of doing this?
macro doarray(arr)
if in(:head, fieldnames(typeof(arr))) && arr.head == :vect
println("Do Something")
else
throw(ArgumentError("$(arr) should be a vector"))
end
end
julia-lang
julia-lang
asked Nov 22 at 17:33
RAbraham
2,49722542
asked Nov 22 at 17:33
RAbraham
2,49722542
asked Nov 22 at 17:33
RAbraham
2,49722542
asked Nov 22 at 17:33
RAbraham
2,49722542
asked Nov 22 at 17:33
RAbraham
2,49722542
2,49722542
2
If you want to allow only[A, B, C, ...]like syntax then you have to look for:vectin head as you write as far as I know. However, you can construct a vector also usingvcatlike this[1;2;3]and this pattern will not cover this (butvcatalso can produce something else than a vector so the case is messy here).
– Bogumił Kamiński
Nov 22 at 17:52
2
Also take a look at Macrotools.jl. You can match against[a__].
– 张实唯
Nov 23 at 2:08
add a comment |
2
If you want to allow only[A, B, C, ...]like syntax then you have to look for:vectin head as you write as far as I know. However, you can construct a vector also usingvcatlike this[1;2;3]and this pattern will not cover this (butvcatalso can produce something else than a vector so the case is messy here).
– Bogumił Kamiński
Nov 22 at 17:52
2
Also take a look at Macrotools.jl. You can match against[a__].
– 张实唯
Nov 23 at 2:08
2
2
If you want to allow only
[A, B, C, ...] like syntax then you have to look for :vect in head as you write as far as I know. However, you can construct a vector also using vcat like this [1;2;3] and this pattern will not cover this (but vcat also can produce something else than a vector so the case is messy here).– Bogumił Kamiński
Nov 22 at 17:52
If you want to allow only
[A, B, C, ...] like syntax then you have to look for :vect in head as you write as far as I know. However, you can construct a vector also using vcat like this [1;2;3] and this pattern will not cover this (but vcat also can produce something else than a vector so the case is messy here).– Bogumił Kamiński
Nov 22 at 17:52
2
2
Also take a look at Macrotools.jl. You can match against
[a__].– 张实唯
Nov 23 at 2:08
Also take a look at Macrotools.jl. You can match against
[a__].– 张实唯
Nov 23 at 2:08
add a comment |
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2
If you want to allow only
[A, B, C, ...]like syntax then you have to look for:vectin head as you write as far as I know. However, you can construct a vector also usingvcatlike this[1;2;3]and this pattern will not cover this (butvcatalso can produce something else than a vector so the case is messy here).– Bogumił Kamiński
Nov 22 at 17:52
2
Also take a look at Macrotools.jl. You can match against
[a__].– 张实唯
Nov 23 at 2:08