// StringTermNode is the visitor for deepest TermNodes nodes that holds a
// string.
func (exec Execute) StringTermNode(s *ast.TermNode) string {
value := exec.resolveTermNode(s)
switch t := value.(type) {
default:
log.Panicf(
"%s: variable %s not a string. Got %T",
s.Pos(), s.IdentifierReference(), t)
case string:
return value.(string)
}
return ""
}
func (exec *Execute) resolveNumeric(n *ast.TermNode) float32 {
node := exec.resolveTermNode(n)
var nodeVal float32
switch t := node.(type) {
default:
pos := n.Pos()
log.Panicf(
"%s:runtime error: Type impossible to execute comparison. got: %T",
pos, t)
case int:
nodeVal = float32(node.(int))
case float32:
nodeVal = node.(float32)
}
return nodeVal
}
// MathTermNode is the visitor for deepest TermNodes nodes that holds a number.
func (exec Execute) MathTermNode(s *ast.TermNode) float32 {
value := exec.resolveTermNode(s)
switch t := value.(type) {
default:
log.Panicf("%s: variable %s not a number. Got %T", s.Pos(),
s.IdentifierReference(), t)
case nil:
return 0
case int:
return float32(value.(int))
case float32:
return value.(float32)
case string:
str := value.(string)
v, err := strconv.ParseFloat(str, 32)
if err != nil {
log.Panicf("%s: variable %s not a number. Got: %s",
s.Pos(), s.IdentifierReference(), str)
}
return float32(v)
}
return 0
}