Software Components as Invariant-Typed Arrows -- The Science of Killing Bugs in a Black Box -- Spill Code Placement for SIMD Machines.- Left Recursion in Parsing Expression Grammars.- Speed and Precision in Range Analysis.- Parameter Based Constant Propagation.- Adaptable Parsing Expression Grammars.- Optimizing a Geomodeling Domain Specific Language.-A System for Runtime Type Introspection in C++.- Model-Based Programming Environments for Spreadsheets.- A Quantitative Assessment of Aspectual Feature Modules for Evolving Software Product Lines.- Attribute Grammar Macros.  The Science of Killing Bugs in a Black Box -- Spill Code Placement for SIMD Machines.- Left Recursion in Parsing Expression Grammars.- Speed and Precision in Range Analysis.- Parameter Based Constant Propagation.- Adaptable Parsing Expression Grammars.- Optimizing a Geomodeling Domain Specific Language.-A System for Runtime Type Introspection in C++.- Model-Based Programming Environments for Spreadsheets.- A Quantitative Assessment of Aspectual Feature Modules for Evolving Software Product Lines.- Attribute Grammar Macros. .

This book constitutes the proceedings of the 16th Brazililan Symposium on Programming Languages, SBLP 2012, held in Natal, Brazil, in September 2012. The 10 full and 2 short papers were carefully reviewed and selected from 27 submissions. The papers cover various aspects of programming languages and software engineering.