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Shift string format validation into the
ext.Strings()
library.This change also removes all references to the string format extensions within
the cel and interpreter packages, and shifts validation from an
InterpretableDecorator
to an
cel.ASTValidator
which is applied immediately after type-checking.Note to reviewers: the majority of the changes are present in the
ext/formatting.go
file, and contained within the
stringFormatValidator
. There are some subtle differencessuch as the new validator checks by function name only, and not by overload id (this
will be addressed in a future PR), and the argument length check applies to the original
call signature (size 1) rather than the internal call signature which includes the call
target as the first argument (size 2). Most of the rest of the code is quite similar
to what existed beforehand.
Closes #638