feat: add Num.round method for rounding numbers to nearest integer

Implement the `round` method on the Num class that rounds a number to the nearest integer using standard rounding rules (away from zero for .5). The implementation adds a new `num_round` primitive function in the VM core, registers it as a method on the Num class, includes documentation in the core module reference, and adds a comprehensive test file covering positive, negative, zero, and fractional cases.
2017-09-21 00:27:02 +00:00
parent c332ca35fd
commit 884e6853d3
4 changed files with 20 additions and 0 deletions
@@ -593,6 +593,7 @@ DEF_NUM_FN(ceil,    ceil)
 DEF_NUM_FN(cos,     cos)
 DEF_NUM_FN(floor,   floor)
 DEF_NUM_FN(negate,  -)
+DEF_NUM_FN(round,   round)
 DEF_NUM_FN(sin,     sin)
 DEF_NUM_FN(sqrt,    sqrt)
 DEF_NUM_FN(tan,     tan)
@@ -1270,6 +1271,7 @@ void wrenInitializeCore(WrenVM* vm)
  PRIMITIVE(vm->numClass, "cos", num_cos);
  PRIMITIVE(vm->numClass, "floor", num_floor);
  PRIMITIVE(vm->numClass, "-", num_negate);
+  PRIMITIVE(vm->numClass, "round", num_round);
  PRIMITIVE(vm->numClass, "sin", num_sin);
  PRIMITIVE(vm->numClass, "sqrt", num_sqrt);
  PRIMITIVE(vm->numClass, "tan", num_tan);