Compiler design by gate vidyalay

  • How do you find first in compiler design?

    Compiler Design is the structure and set of principles that guide the translation, analysis, and optimization process of a compiler.
    A Compiler is computer software that transforms program source code which is written in a high-level language into low-level machine code..

  • How to do parsing in compiler design?

    In compiler design, top-down parsing is a parsing technique that involves starting with the highest-level nonterminal symbol of the grammar and working downward to derive the input string.
    An example of top-down parsing is recursive descent parsing..

  • What is top-down translation in compiler design?

    Rules to find First()
    If X is a terminal, then First(X) is {X}.
    If X is a non-terminal and X tends to aα is production, then add 'a' to the first of X. if X-\x26gt;ε, then add null to the First(X).
    If X_\x26gt;YZ then if First(Y)=ε, then First(X) = { First(Y)-ε} U First(Z)..

First Function-

Example-

How do you calculate follow in compiler design?

Follow (C) = { First (B) – ∈ } ∪ Follow (S) ∪ First (b) ∪ Follow (A) = { g , $ , b , h } Get more notes and other study material of Compiler Design.
Watch video lectures by visiting our YouTube channel LearnVidFun.

Important Notes-

Note-01:

Problem-05

Calculate the first and follow functions for the given grammar- E → E + T / T T → T x F / F F → (E) / id

Rules For Calculating First Function-

Rule-01:

Rules For Calculating Follow Function-

Rule-01:

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