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Justin Ethier 2017-01-04 18:25:58 -05:00
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docs/Writing-the-Cyclone-Scheme-Compiler-Revision-1.md
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@ -178,7 +178,7 @@ Free variables passed to a nested function must be captured in a closure so they
Cyclone uses flat closures - objects that contain a single function reference and a vector of free variables. This is a more efficient representation than an environment as only a single vector lookup is required to read any of the free variables.
Mutated variables must be added to a pair (called a "cell") by a separate compilation pass executed prior to closure conversion.
Mutated variables are not directly supported by flat closures and must be added to a pair (called a "cell") by a separate compilation pass prior to closure conversion.
Cyclone's closure conversion is based on code from Marc Feeley's 90 minute Scheme->C compiler and Matt Might's Scheme->C compiler.