ArkScript v4.0.0-13

Added

• $as-is to paste a node inside a maro without evaluating it further ; useful to stop recursive evaluation of nodes inside function macros
• LOAD_SYMBOL_BY_INDEX instruction, loading a local from the current scope by an index (0 being the last element added to the scope)
• STORE_FROM_INDEX and SET_VAL_FROM_INDEX instructions for parity with the super instructions not using load by index
• INCREMENT_BY_INDEX and DECREMENT_BY_INDEX instructions for parity with the super instructions not using load by index
• STORE_TAIL_BY_INDEX, STORE_HEAD_BY_INDEX, SET_VAL_TAIL_BY_INDEX, SET_VAL_HEAD_BY_INDEX super instructions added for parity with the super instructions not using load by index
• RESET_SCOPE instruction emitted at the end of a while loop to reset a scope so that we can create multiple variables and use LOAD_SYMBOL_BY_INDEX

Changed

• -bcr option can be given a source file, it will then be compiled before its bytecode is shown
• magic numbers for tables start in bytecode files have been changed from 0x01, 0x02, 0x03 to 0xA1, 0xA2, 0xA3 (symbols, values, code) to make them stand out in hex editors
• magic numbers for value types in bytecode files have been changed from 0x01, 0x02, 0x03 to 0xF1, 0xF2, 0xF3 (number, string, function)
• numbers in the values table in bytecode files are no longer stringified but their IEEE754 representation is now encoded on 12 bytes (4 for the exponent, 8 for the mantissa)
• changed how scopes are stored inside the VM to enhance performances. All scope data are now contiguous!
• when possible, accessing variables from the current scope is compiled to a new instruction LOAD_SYMBOL_BY_INDEX, to avoid the sometimes expansive lookup by id
  • this works inside normal scopes (introduced by while loops) and functions scopes, but not for closures