[Moose-dev] Re: PetitParser PPCompositeParser, Infinite loop ?

Hi, this part is probably your issue: TypeName: Identifier /TypeName . Identifier If your TypeDeclSpecifier starts out with something that isn't an Identifier, then the TypeName: will fail the first choice (Identifier), then try the second choice - which immediately calls TypeName again, which will fail the first choice (Identifier) and call itself again - and so on until it crashes or you break the processing. In general, any time that a parser can start out by calling itself directly (without some other action occurring before), it will probably go into a loop. (This might be something that would be nice to have PetitParser catch - infinite loops. Not easy, probably not cheap, but doable.) Also, you generally want to make the most specific option first in your parsers - if TypeName could be 'Identifier' or 'Identifier . Identifier', then you would want to check for 'Identifier . Identifier' first. -cbc On Tue, Dec 17, 2013 at 2:22 PM, Benjamin AREZKI <benjamin.arezki(a)gmail.com>wrote;wrote: