Lexical analysis

<programming> (Or "linear analysis", "scanning") The first stage of processing a language.

The stream of characters making up the source program or other input is read one at a time and grouped into lexemes (or "tokens") - word-like pieces such as keywords, identifiers, literals and punctutation.

The lexemes are then passed to the parser.

["Compilers - Principles, Techniques and Tools", by Alfred V. Aho, Ravi Sethi and Jeffrey D. Ullman, pp. 4-5]

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