Re: [Rd] 'else' on new line not parsed at top level as part of preceding 'if'

BTW, this is discussed in section 3.2.1 of "The R Language Definition". Duncan Murdoch On 2024-12-02 10:56 a.m., Mikael Jagan wrote: I wonder if there is room for improvement here: > str2lang("if (a) b1else b0") if (a) b1 else b0 > str2lang("if (a) b1 \n else b0") E

Re: [Rd] 'else' on new line not parsed at top level as part of preceding 'if'

This is well known, and it's necessary for reasonable behaviour in an interactive context. Imagine typing the code you were parsing. The first line is if (a) b1 At this point, the interpreter can't know that an else clause is coming. Since the interpreter evaluates statements when they ar

[Rd] 'else' on new line not parsed at top level as part of preceding 'if'

I wonder if there is room for improvement here: > str2lang("if (a) b1else b0") if (a) b1 else b0 > str2lang("if (a) b1 \n else b0") Error in str2lang("if (a) b1 \n else b0") : :2:2: unexpected 'else' 1: if (a) b1 2: else ^ It only occurs at top level. When t

Re: [Rd] 'else' on new line not parsed at top level as part of preceding 'if'

Thanks - that makes sense. It's also documented in help("if"), so it's doubly clear now that I did not do my homework here. Mikael On 2024-12-02 11:09 am, Duncan Murdoch wrote: BTW, this is discussed in section 3.2.1 of "The R Language Definition". Duncan Murdoch On 2024-12-02 10:56 a.m., Mi