I propose we make this consistent:

let f = Seq.head
let a = f { 1..6 }
let b = f { 1; 2 } // error FS0740: Invalid record, sequence or computation expression. Sequence expressions should be of the form 'seq { ... }'

Now we don't have to allocate entire lists or arrays just to make sets.

let a = set { 1..6 }
let b = set { 1; 2 } // error FS0740: Invalid record, sequence or computation expression. Sequence expressions should be of the form 'seq { ... }'

The existing way of approaching this problem in F# is

let a = set { 1..6 }
let b = set (seq { 1; 2 })

Pros and Cons

The advantages of making this adjustment to F# are

1. Consistency
2. Convenience
3. Less allocation

The disadvantage of making this adjustment to F# is that this may cause confusion as set here isn't a computation expression. However, syntax can be quickly learnt.

Extra information

Estimated cost (XS, S, M, L, XL, XXL): S

Related suggestions: (put links to related suggestions here)

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Please tick this by placing a cross in the box:

• This is not a question (e.g. like one you might ask on stackoverflow) and I have searched stackoverflow for discussions of this issue
• I have searched both open and closed suggestions on this site and believe this is not a duplicate
• This is not something which has obviously "already been decided" in previous versions of F#. If you're questioning a fundamental design decision that has obviously already been taken (e.g. "Make F# untyped") then please don't submit it.

Please tick all that apply:

• This is not a breaking change to the F# language design
• I or my company would be willing to help implement and/or test this

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