Reference

The reference section is the authoritative specification of every MARPLE feature. It's designed to be accurate, complete, and terse.

• Primitive Functions — all 40+ built-in functions
• Operators — reduce, scan, rank, inner/outer product, i-beam
• Direct Definition — dfns and dops
• Array Model — shapes, ranks, index origin, empty arrays
• Indexing — From, bracket indexing, indexed assignment
• System Features — system variables and commands
• Standard Library — $:io, $:str, $:sys, $:error
• Glyph Input — backtick-to-glyph mapping
• Error Messages — error codes and their meanings
• Grammar — parsing rules and binding hierarchy