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Comments (6)

elbrujohalcon avatar elbrujohalcon commented on May 30, 2024

Wow! Amazing catch!

I bet it has something to do with how ktn_dodger parses that expression, but if it's treating that thing as an atom that's super-weird.

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elbrujohalcon avatar elbrujohalcon commented on May 30, 2024

Nope. ktn_dodger correctly interprets that thing as a variable… there is something else going on 🤔

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elbrujohalcon avatar elbrujohalcon commented on May 30, 2024

It's ktn_code:parse_tree/1's fault… it turns Throw into this weird thing…

 [#{attrs =>
        #{location => {9,5},text => "Throw",value => throw},
    type => atom},
  #{attrs =>
        #{location => {9,5},name => 'Throw',text => "Throw"},
    type => var},
  #{attrs => #{location => {9,5},name => '_',text => "Throw"},
    type => var}]

It's normalizing the rest of the pattern as throw:Throw:_, but incorrectly using the text of the first element as the atom text.
Again… nice catch, @paulo-ferraz-oliveira!

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elbrujohalcon avatar elbrujohalcon commented on May 30, 2024

This is where the bug appears:

AtomName0 = ktn_code:attr(text, AtomNode),

We should use value instead of text. But the change has to be done carefully because value is an atom, not a string… and because we want to differentiate between enclosed and non-enclosed macros.

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paulo-ferraz-oliveira avatar paulo-ferraz-oliveira commented on May 30, 2024

I'll try to look at it one of these days, if time allows.

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jackyhui96 avatar jackyhui96 commented on May 30, 2024

Attempted fixing this with #216
Not sure if it's the best solution but it just handles these cases by using the value attribute when it equals to throw otherwise use text attribute.
Found that just switching to use the text attribute had issues as the values were dropping off the backslashes used to escape characters in the atom.

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