LR[1] - Definition. Was ist LR[1]
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Was (wer) ist LR[1] - definition

LR(K) PARSER FOR K=1, I.E. WITH A SINGLE LOOKAHEAD TERMINAL
LR(1) parser; LR(1); Canonical lr parser; Canonical LR

LR parser         
  • Bottom-Up Parser at step 6
  • Bottom-up parse tree built in numbered steps
TYPE OF PARSER
LR(0) parser; LR parsers; Lr parser; LR(0); LR parsing; LR Parser; Shift-reduce conflict; LR grammar; LR(1) grammar; LR(k) grammar; LR(k)
In computer science, LR parsers are a type of bottom-up parser that analyse deterministic context-free languages in linear time. There are several variants of LR parsers: SLR parsers, LALR parsers, Canonical LR(1) parsers, Minimal LR(1) parsers, and GLR parsers.
Lr         
WIKIMEDIA DISAMBIGUATION PAGE
Lr; LR (disambiguation); L.R.; L.r.; Lr.; L R
¦ symbol the chemical element lawrencium.
L.R.         
WIKIMEDIA DISAMBIGUATION PAGE
Lr; LR (disambiguation); L.R.; L.r.; Lr.; L R
Lloyd's Register of Shipping

Wikipedia

Canonical LR parser

In computer science, a canonical LR parser or LR(1) parser is an LR(k) parser for k=1, i.e. with a single lookahead terminal. The special attribute of this parser is that any LR(k) grammar with k>1 can be transformed into an LR(1) grammar. However, back-substitutions are required to reduce k and as back-substitutions increase, the grammar can quickly become large, repetitive and hard to understand. LR(k) can handle all deterministic context-free languages. In the past this LR(k) parser has been avoided because of its huge memory requirements in favor of less powerful alternatives such as the LALR and the LL(1) parser. Recently, however, a "minimal LR(1) parser" whose space requirements are close to LALR parsers, is being offered by several parser generators.

Like most parsers, the LR(1) parser is automatically generated by compiler-compilers like GNU Bison, MSTA, Menhir, HYACC, LRSTAR.