'Ambiguous expression grammar' presentation slideshows

Describing Syntax and Semantics

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Grammars

Grammars. Examples and Issues. Examples from Last Lecture. a + b a b + a*bc* First draw a state diagram Then create a rule for each transition. a + b. a. a. b. 2. 3. 1. <1> -> a <2> <2> -> a <2> <2> -> b <3> <3> -> e. <1> -> a <2> <2> -> a <2> | b. or. a b +. b. a. b. 2.

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Grammars

Grammars. Definitions Grammars Backus-Naur Form Derivation terminology trees Grammars and ambiguity Simple example Grammar hierarchies Syntax graphs Recursive descent parsing. Definitions. Syntax the form or structure of the expressions, statements, and program units Semantics

250 views • 19 slides

Programming Languages 2nd edition Tucker and Noonan

Programming Languages 2nd edition Tucker and Noonan. Chapter 2 Syntax A language that is simple to parse for the compiler is also simple to parse for the human programmer. N. Wirth. Contents. 2.1 Grammars 2.1.1 Backus-Naur Form 2.1.2 Derivations 2.1.3 Parse Trees

290 views • 16 slides