Method ResolveName

interpreter/interpretable.go:1563–1593

ResolveName overrides the default Activation lookup to perform lazy initialization of the accumulator and specialized lookups of iteration values with consideration for whether the final result is being computed and the iteration variables should be ignored.

(name string)

// and specialized lookups of iteration values with consideration for whether the final result is being
// computed and the iteration variables should be ignored.
func (f *folder) ResolveName(name string) (any, bool) {
	if name == f.accuVar {
		if !f.initialized {
			f.initialized = true
			initVal := f.accu.Exec(f.frame.parent)
			if !f.exhaustive {
				if l, isList := initVal.(traits.Lister); isList && l.Size() == types.IntZero {
					initVal = types.NewMutableList(f.adapter)
					f.mutableValue = true
				}
				if m, isMap := initVal.(traits.Mapper); isMap && m.Size() == types.IntZero {
					initVal = types.NewMutableMap(f.adapter, map[ref.Val]ref.Val{})
					f.mutableValue = true
				}
			}
			f.accuVal = initVal
		}
		return f.accuVal, true
	}
	if !f.computeResult {
		if name == f.iterVar {
			f.iterVar1Val = f.adapter.NativeToValue(f.iterVar1Val)
			return f.iterVar1Val, true
		}
		if name == f.iterVar2 {
			f.iterVar2Val = f.adapter.NativeToValue(f.iterVar2Val)
			return f.iterVar2Val, true
		}
	}
	return f.frame.parent.ResolveName(name)
}

// Parent returns the activation embedded into the folder.
func (f *folder) Parent() Activation {