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Line 27: The Production Quality Compiler-Compiler ([[PQCC]]) project at [[Carnegie Mellon University]] does not formalize semantics, but does have a semi-formal framework for machine description. Compiler-compilers exist in many flavors, including bottom-up rewrite machine generators (see [~~http~~https://jburg.sourceforge.net/ JBurg]) used to tile syntax trees according to a rewrite grammar for code generation, and [[attribute grammar]] parser generators (e.g. [[ANTLR]] can be used for simultaneous type checking, constant propagation, and more during the parsing stage). ===Metacompilers===

Compiler-compiler: Difference between revisions