ArrayOperand converts x to an array.

BigIntOperand converts x to a big int.

FloatToNumber converts f to a number.

IntOperand converts x to an int.

IntToNumber converts i to a number.

NewOperandElementErr returns an operand error indicating an element in the composite operand was wrong.

NewOperandEnumErr returns an operand error indicating a value was wrong.

NewOperandErr returns a generic operand error.

NewOperandTypeErr returns an operand error indicating the operand's type was wrong.

NumberOperand converts x to a number.

NumberToFloat converts n to a big float.

NumberToInt converts n to a big int.

ObjectOperand converts x to an object.

RuneSliceOperand converts x to a []rune.

SetOperand converts x to a set.

StringOperand converts x to a string.

StringSliceOperand converts x to a []string.

Cache defines the built-in cache used by the top-down evaluation.

ErrOperand represents an invalid operand has been passed to a built-in function.

We use an ast.Object for the cached keys/values because a naive map[ast.Value]ast.Value will not correctly detect value equality of the member keys.