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4.4 The Parser Create Function yystate_new

(The current push parsing interface is experimental and may evolve. More user feedback will help to stabilize it.)

You call the function yypstate_new to create a new parser instance. This function is available if either the %define api.push_pull "push" or %define api.push_pull "both" declaration is used. See A Push Parser.

— Function: yypstate *yypstate_new (void)

The fuction will return a valid parser instance if there was memory available or 0 if no memory was available. In impure mode, it will also return 0 if a parser instance is currently allocated.