registry.scheme.org/features.scm

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;; Feature identifiers for (cond-expand) and (features)
;; R7RS Standard Feature Identifiers
(id r7rs)
(description "All R7RS Scheme implementations have this feature")
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(id exact-closed)
(description "The algebraic operations +, -, *, and expt (where the second argument is a non-negative integer) produce exact values given exact inputs")
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(id exact-complex)
(description "Exact complex numbers are provided")
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(id ieee-float)
(description "Inexact numbers are IEEE 754 binary floating point values")
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(id full-unicode)
(description "All Unicode characters present in Unicode version 6.0 are supported as Scheme characters")
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(id ratios)
(description "/ with exact arguments produces an exact result when the divisor is nonzero")
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(id jvm)
(description "Running on a Java Virtual Machine (JVM)")
(id clr)
(description "Running on a Common Language Runtime (.NET CLR)")
(id llvm)
(description "Running on the LLVM compiler infrastructure")
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(id ilp32)
(description "C language int, long and pointer types are all 32 bits wide")
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(id lp64)
(description "C language int type is 32 bits, long and pointer 64 bits wide")
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(id ilp64)
(description "C language int, long, and pointer types are all 64 its wide")
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(id big-endian)
(description "The CPU byte order is big-endian")
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(id little-endian)
(description "The CPU byte order is little-endian")
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;; Others
(id |64bit|)
(description "Running on a 64-bit CPU (note: symbol starts with number)")
(id complex)
(description "Complex numbers are provided")
(id clang)
(description "LLVM clang compiler [Chicken]")
(id crypto)
(description "Crypto interface [Sagittarius]")
(id csi)
(description "Chicken Scheme interpreter")
(id dload)
(description "Dynamic loading of C libraries [Chicken]")
(id dynamic-loading)
(description "Dynamic loading of C libraries [Chibi]")
(id ffi)
(description "[Sagittarius]")
(id ffi-vargs)
(description "[Sagittarius]")
(id full-numeric-tower)
(description "All RnRS number types are implemented [Chicken]")
(id manyargs)
(description "[Chicken]")
(id mit/gnu)
(description "MIT/GNU Scheme")
(id modules)
(description "[Chibi]")
(id odbc)
(description "ODBC interface [Sagittarius]")
(id ptables)
(description "[Chicken]")
(id socket)
(description "Sockets interface [Sagittarius]")
(id srfi-*)
(description "Scheme Request for Implementation number N implemented")
(id swank)
(description "Common Lisp SWANK remote REPL protocol supported")
(id termios)
(description "Termios interface [Sagittarius]")
(id threads)
(description "Multi-threading is supported (either green threads or OS threads)")
(id regexp-backrefs)
(description "[SRFI 115]")
(id regexp-look-around)
(description "[SRFI 115]")
(id regexp-non-greedy)
(description "[SRFI 115]")
(id regexp-unicode)
(description "[SRFI 115]")
(id uvector)
(description "[Chibi]")
(id zlib)
(description "Zlib interface [Sagittarius]")