'Lambda exp' presentation slideshows

CS220 Programming Principles

CS220 Programming Principles. ?????? ?? 2002 ???? Class 16: Variations on Evaluator ? ??. Syntactic Analysis. Syntax analysis is interleaved with execution. Source of Inefficiency - Syntax is analyzed many times Ex: (define (factorial n) (if (= n 1) 1

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CAS810: WEEK 3

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Inductively Defined Data Concrete and Abstract syntax

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2.2.2 Abstract Syntax

2.2.2 Abstract Syntax. Recall BNF definition of l -calculus expressions: <expression> ::= <identifier> ::= (lambda ( <identifier> ) <expression> ) ::= ( <expression> <expression> ) Uses concrete syntax: includes parens, and keywords like lambda

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