else?

[SooLee]

I noticed 1) works but not 2). Can we have else for conditional blocks (not just one-liners)?

1)

workflow merge {
    Array[File] smallfiles = []
    if(length(smallfiles)>2) {
        call paste {input: files = smallfiles}
    }
    if(length(smallfiles)<=2) {
        call cat {input: files = smallfiles}
    }
}

2)

workflow merge {
    Array[File] smallfiles = []
    if(length(smallfiles)>2) {
        call paste {input: files = smallfiles}
    }
    else {
        call cat {input: files = smallfiles}
    }
}

ERROR: Unexpected symbol (line 6, col 5) when parsing '_gen10'.
Expected rbrace, got else.

[rhpvorderman]

if .. then .. else
is a very well-known paradigm in programming. Also it is human readable. So this not violate the goals of WDL and I am very much in favour of adding this.

[illusional]

It would be good to add specifics for if, else if and else.