Hi,
I am planning to write a simple search engine. The engine would be
able to search for a word or phrases from a file and probably point
the user the line number the word is found.
The issue is I want the engine to be able to support more advance
search techniques which means it could support keywords such as

word1 and word2
word1 not word3
word1 or word4

Is there any module where I could simply plug into my problem to
enable this functinality. Thanks.

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