Name:getenv - evaluates if a string is an evironment variable
Synopsis:
string getenv -> path true
string getenv -> false
Examples:
SLI ] (HOME) getenv
SLI [2] pstack
true
(/home/gewaltig)
SLI ] (NONEXISTING) getenv =
false
SLI ] (NEST_DATA_DIR) getenv
SLI [2] { (Using root path: ) =only = }
SLI [3] { (Warning: $NEST_DATA_DIR undefined) =}
SLI [4] ifelse
Using root path: /home/gewaltig/nest/release/release
SLI ] (/home) getenv
false
Description:
getenv checks if the string is an environment variable. If
this is the case the path of the variable and true is pushed on the stack,
otherwise a false is pushed on the stack and the string is lost.
Remarks:
if getenv is used with the wrong argument (e.g. integer),
the SLI Session is terminated
Author:
docu by Marc Oliver Gewaltig and Sirko Straube
SeeAlso:
Source:/opt/conda/conda-bld/nest_1512397208563/work/nest-2.14.0/sli/slistartup.cc