Method Extract

core/codegen/value.go:224–239

Extract returns the field at extracted from the struct or array v.

(at IndexOrName)

// Extract returns the field at extracted from the struct or array v.
func (v *Value) Extract(at IndexOrName) *Value {
	switch ty := v.ty.(type) {
	case *Struct:
		f, idx := field(ty, at)
		return v.b.val(f.Type, v.b.llvm.CreateExtractValue(v.llvm, idx, f.Name))
	case *Array:
		idx, ok := at.(int)
		if !ok {
			fail("Extract parameter at must be int for arrays values. Got %T", at)
		}
		return v.b.val(ty.Element, v.b.llvm.CreateExtractValue(v.llvm, idx, fmt.Sprintf("%v[%d]", v.name, idx)))
	default:
		fail("Attempted to extract on non-struct and non-array type %v", v.ty.TypeName())
		return nil
	}
}

// IsNull returns true if the pointer value v is null.
func (v *Value) IsNull() *Value {