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

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 :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

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

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

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 :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

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

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

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

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

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

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 :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

Also take a look at Macrotools.jl. You can match against [a__].
– 张实唯
Nov 23 at 2:08

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

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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