Compiler Construction - Lexical Analysis

Lexical Analysis

The first phase of constructing a compiler is lexical analysis of the source program. This phase involves reading the source programs and grouping the characters into lexemes. A token of the form is produced for each lexeme. Lexical analysis can also be termed as scanning.

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    Analysis as an instrument of enlightenment and civilization is good, in so far as it shatters absurd convictions, acts as a solvent upon natural prejudices, and undermines authority; good, in other words, in that it sets free, refines, humanizes, makes slaves ripe for freedom. But it is bad, very bad, in so far as it stands in the way of action, cannot shape the vital forces, maims life at its roots. Analysis can be a very unappetizing affair, as much so as death.
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