Translator – Operators (New Design)

The new design for operators will be that each data type combination will have it's own code. There will be associated codes for the first operand and associated codes for the second operand. For efficiency, there will be just one associated codes array with the second operand associated codes after the first operand associated codes. In addition to the number of associated codes value, there will be a new secondary associated codes index that will point to the first second operand associated, which can also be used to determine the end of the first operand associated codes.

Again using plus as an example, the main codes along with associated codes are list below. The convention will still be that the default operator has double arguments. The “I1” and “I2” codes represent the first or second operand being an integer, and the “Int” code for two integer operands. Similarly for strings where the “T1” and “T2” codes represent the first or second operand being a temporary string, and the “TT” code will for two temporary string operands.

Add  (4, 3)  AddI1, CatStr, CatStrT1, AddI2
AddI1  (1, 0)  AddInt
CatStr  (1, 0)  CatStrT2
CatStrT1  (1, 0)  CatStrTT

The second operand associated codes are underlined. The first number in parentheses is the number of associated codes and the second underlined number is the start index of the second operand associated codes. The decision for this design was arrived at by looking at the assembly language generated for approximately what the run-time will look like. Information about the assembly language research after the Continued break...