Applies a parser to the text. If it does not succeed, an empty token is returned.
Optional parser never fails.
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Function to be executed if recognition succeeds. It takes as input parameters information derived from parsers involved as parameters
Function to be executed if recognition does not succeed. I takes two parameters:
In case of success,
action gets the
node returned by parser passed as optional. Otherwise, it gets the
node corresponding to token
error is never called. It is defined as parameter for the sake of homogeneity with the rest of functions.
Anonymous functions, returning a list.
From these input parameters, an anonymous function is constructed. This function admits just one parameter, stream, with
streamParser class, and returns a three-field list:
"ok" or "fail"
error function output, depending on the case
With information about the input, after success or failure in recognition
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