As input to the machine is processed, the machine moves from state to state as specified by the logic of the machine. In the case of the parser, the input is the language being parsed, and the states correspond to various stages in the grammar rules. See Algorithm . Infix operator An arithmetic operator that is placed between the operands on which it performs some operation. A continuous flow of data between devices or programs.
Language construct One of the typical usage schemas of the language.
See Language and Grammar . See Precedence . See Recursion . See Algorithm . A function that reads an input stream and returns tokens one by one.