Accept less dont advance input pointer uw cse 401

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Unformatted text preview: scanners •  Cons –  “Magic” –  Code is unreadable –  Generates lots of code (but can be fairly fast) Winter 2013 UW CSE 401 (Michael Ringenburg) 22 11 1/14/13 The Real World C CSE341: Programming Languages Languages •  In commercial sSE341: (and most gcc front ends) enngs Programming hand wriwen scanners used more oqen than not. Lecture 1 Lecture 1 Course Course Mechanics Mechanics –  Especially for larger languages, e.g., C++/Java. ML C/C++ front end (used by ML Variable DG Variable Bindings –  Can purchase, e.g., EBindings Cray, Intel, others). Dan Grossman •  Why? Dan Grossman Fall 2011 Fall 2011 –  Fastest –  Can handle language corner cases – C++ especially bad. –  Readable/debuggable code. Winter 2013 UW CSE 401 (Michael Ringenburg) 23 Example: A hand- wriwen DFA and scanner CSE341: Programming CSE341: Programming Languages Languages •  To demonstrate, w...
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