[pkg/ottl] Fix bug where function names were allowed in comparison #33051
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| @@ -1952,6 +1950,7 @@ func Test_parseCondition(t *testing.T) { | |||
| {`One() == 1`, false}, | |||
| {`test(fail())`, true}, | |||
| {`Test()`, false}, | |||
| {`"test" == Foo`, true}, | |||
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What does the error look like now?
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It looks like
statement has invalid syntax: 1:50: unexpected token "<EOF>" (expected "(" (Argument ("," Argument)*)? ")" Key*)
Which isn't the best, but at least it gives you hints where the issue is. I played around with keeping FunctionName in value and then doing a custom error when it is set, but that caused parsing issues bc value is checked before FunctionName in arguments. It might be possible with some fancy negative lookaheads
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was playing with this today, mainly to understand it better and did some more or less crazy/dumb ideas but didn't managed to get any better error message than this one
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I think overall we should try to avoid printing any grammar parsing errors since I think to most users they're incredibly cryptic. That said, this is still better than an error with "This is a bug in the OpenTelemetry Transformation Language" in it. I'd say let's get this in for now and circle back later.
Description:
Fix a bug where a condition like
"foo" = Barresulted in the errorno value field set. This is a bug in the OpenTelemetry Transformation Language.Link to tracking Issue:
Closes #33048
Testing:
Updated unit tests