Preserve YANG elements order when generating structs about ygot HOT 1 OPEN

Hi, the fields are ordered here:

and the writing to the template is done here by looping through the slice:

If you trace back the dataflow from ParsedDirectory.Fields, then you'll eventually reach goyang's Entry type with its Dir map[string]*Entry field, whereupon you'll end up at https://github.com/openconfig/goyang/blob/5ad0d2feb9ce655fb39e414bd4e3696356780cdb/pkg/yang/entry.go#L410-L418, which is invoked in ToEntry: https://github.com/openconfig/goyang/blob/5ad0d2feb9ce655fb39e414bd4e3696356780cdb/pkg/yang/entry.go#L712-L720, and here you'll finally find some of the original ordering, but even then they're grouped by node type (e.g. leaf vs. leaf-list): https://github.com/openconfig/goyang/blob/5ad0d2feb9ce655fb39e414bd4e3696356780cdb/pkg/yang/ast.go#L454

So fundamentally the issue is that the order of fields are not respected when the Entry representation is converted from the original parsed AST (i.e. []*Statement).

TLDR: The easiest way I can see is to loop through the set of Entry.Node.Statement().SubStatements() to find the ordering, and use that order at

Any other solution would involve adding a new field to either the Entry AST or other Node types, and that would involve some more effort.

from ygot.