Macros with InvocationArguments and returning the arguments

[kkirby]

Hello,

I have this macro:

macro A
    syntax args as InvocationArguments
        ASTE console.log $args

One would expect this code:

A \testing,\one,\two,\three

To output:

console.log('testing','one','two','three')

However, the output is actually:

console.log('three')

Is there anyway to return the arguments in the AST expression?

[ckknight]

The problem is that args is in fact an array of AST nodes, and when injected in a macro, it turns into a block. In the expression syntax, this is done through the comma operator.

So what you're doing is essentially console.log(('testing', 'one', 'two', 'three')), and since the first three are no-ops in that position, they are ignored, leaving just console.log('three').

What you need to do is convert the args into an array using @internal-call \array, args, then you can use it as an array node in your macro.

Here is a full example:

macro A
  syntax args as InvocationArguments
    let arr = @internal-call \array, args
    ASTE console.log ...$arr

A \testing,\one,\two,\three