[R] difference between "external pointer" and "weak reference"

Vanguelov, Krassimir Krassimir.Vanguelov at CommerzbankIB.com
Fri Jan 17 13:56:03 CET 2003

Dear R-help,

Could you tell me where can I read more about the difference between
"external pointer"(EXTPTRSXP) and "weak reference"(WEAKREFSXP) in R and what
were they intended for? 


Krassimir Vanguelov 

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