Function computeNamedStructFields

rows.go:774–830

(
	fldDescs []pgconn.FieldDescription,
	t reflect.Type,
	fields []structRowField,
	fieldStack *[]int,
)

}

func computeNamedStructFields(
	fldDescs []pgconn.FieldDescription,
	t reflect.Type,
	fields []structRowField,
	fieldStack *[]int,
) ([]structRowField, string) {
	var missingField string
	tail := len(*fieldStack)
	*fieldStack = append(*fieldStack, 0)
	for i := 0; i < t.NumField(); i++ {
		sf := t.Field(i)
		(*fieldStack)[tail] = i
		if sf.PkgPath != "" && !sf.Anonymous {
			// Field is unexported, skip it.
			continue
		}
		// Handle anonymous struct embedding, but do not try to handle embedded pointers.
		if sf.Anonymous && sf.Type.Kind() == reflect.Struct {
			var missingSubField string
			fields, missingSubField = computeNamedStructFields(
				fldDescs,
				sf.Type,
				fields,
				fieldStack,
			)
			if missingField == "" {
				missingField = missingSubField
			}
		} else {
			dbTag, dbTagPresent := sf.Tag.Lookup(structTagKey)
			if dbTagPresent {
				dbTag, _, _ = strings.Cut(dbTag, ",")
			}
			if dbTag == "-" {
				// Field is ignored, skip it.
				continue
			}
			colName := dbTag
			if !dbTagPresent {
				colName = sf.Name
			}
			fpos := fieldPosByName(fldDescs, colName, !dbTagPresent)
			if fpos == -1 {
				if missingField == "" {
					missingField = colName
				}
				continue
			}
			fields[fpos] = structRowField{
				path: append([]int(nil), *fieldStack...),
			}
		}
	}
	*fieldStack = (*fieldStack)[:tail]

	return fields, missingField
}