Add topic "lr-parser"

Author: shaedrich

topics/lr-parser/index.md

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+---
+display_name: LR parser
+short_description: LR parsers are a type of bottom-up parser that analyse deterministic context-free languages in linear time.
+topic: lr-parser
+aliases: lr-parsing
+related: ll-parser
+wikipedia_url: https://en.wikipedia.org/wiki/LR_parser
+---
+In computer science, LR parsers are a type of bottom-up parser that analyse deterministic context-free languages in linear time.[1] There are several variants of LR parsers: SLR parsers, LALR parsers, Canonical LR(1) parsers, Minimal LR(1) parsers, and GLR parsers. LR parsers can be generated by a parser generator from a formal grammar defining the syntax of the language to be parsed. They are widely used for the processing of computer languages.