Syntax Analysis

Syntax Analysis This article will describe the parsing method used in the compiler. The grammatical rule of programming language can be constructed with the help of context-free grammars or BNF (Backus–Naur form) notations. The grammar offers some great benefits for...

CLR Parsing

CLR Parsing CLR parsing refers to the canonical lookahead. We will use the canonical collection of LR(1) items for the construction of the CLR(1) parsing table. Generally, CLR(1) parsing has more number of states as compared to SLR(1) parsing. In the CLR(1), the...

Derivation and Parse Tree in Compiler Design

Derivation and Parse Tree In this article, we will learn Derivation and Parse Tree. Derivations The parse tree can be constructed by taking a derivational view in which production is treated as rewriting rules. In each rewriting step, a non-terminal is replaced by the...

SLR 1 Parsing

SLR(1) Parsing It is a simple LR parsing. Most of the function of this parsing is the same as LR(0) parsing. The parsing table for both the parser vary. The SLR(1) parsing use canonical LR(0) item. The reduce move is placed only in the FOLLOW of those variables whose...

Ambiguity Elimination

Ambiguity Elimination Ambiguity elimination makes the sentence clear and readable. A sentence is grammatically ambiguous if it can produce more than one parse tree for a particular grammar. In this article, we will learn how to remove ambiguity to make the grammar...

LR Parser

LR Parser LR parsing is a type of bottom-up parsing that is used to parse the large class of grammars. Here “L” stands for left-to-right scanning of the input “R” stands for constructing a right-most derivation in reverse. LR parser is divided...

YACC in Compiler Design

YACC  YACC is known as Yet Another Compiler Compiler. It is used to produce the source code of the syntactic analyzer of the language produced by LALR (1) grammar. The input of YACC is the rule or grammar, and the output is a C program. Stephen C. Johnson creates...

Regular Expression | Compiler Design

Regular Expression A regular expression is a set of patterns that can match a character or string. It can also match alternative characters or strings. The grammar defined by the regular expression is known as regular grammar, and the language is known as regular...

LALR 1 Parsing | Compiler Design

LALR (1) Parsing The LALR parsing refers to the “lookahead LR” that has many lesser steps than typical parsers based on LR(1) items. For constructing the LALR(1) parsing table, the canonical collection of LR(1) items is used. In the LALR(1) parsing, the...

Evolution of Programming Languages in Compiler Design

The Evolution of Programming Languages The first computer came in the 1940s and was programmed in a binary language that told the computer what operations are to be performed and in which order. The operations were deficient level as well as the kind of programming...

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