On Sun, 2021-06-06 at 18:14 +1000, Rob Pike wrote:
> You are using a steamroller to press a shirt.
Tomi Ungerer has already published this approach.
https://kotonoha-books.ocnk.net/data/kotonoha-books/product/20160619_70ddf5.JPG
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It is to protect the regexp engine from overly expensive computations, as
the repetition can introduce quadratic behavior in the compiler. The Go
engine is concerned about pathological execution - not all engines have
this property (see https://swtch.com/~rsc/regexp/regexp1.html) - and is
being
Playground: https://play.golang.org/p/opVpDD5Ts8S
Here's an example regex that fails to compile: `[a-zA-Z0-9]{1001,}`
Here's where the 1000 is specified:
https://github.com/golang/go/blob/4d9ecde/src/regexp/syntax/parse.go#L250
Other languages regex engine behavior: The regex is valid on all
