tree ee95557a960d33ddd47d037d03bf6265372cb2e6
parent ca930e20bb54d823a90598f1f861a76bd18bc7c7
author Julia Lawall <Julia.Lawall@lip6.fr> 1542385799 +0100
committer David Gibson <david@gibson.dropbear.id.au> 1542585980 +1100

annotations: add positions

Extend the parser to record positions, in build_node,
build_node_delete, and build_property.

srcpos structures are added to the property and node types, and to the
parameter lists of the above functions that construct these types.
Nodes and properties that are created by the compiler rather than from
parsing source code have NULL as the srcpos value.

merge_nodes, defined in livetree.c, uses srcpos_extend to combine
multiple positions, resulting in a list of positions.  srcpos_extend
is defined in srcpos.c.  New elements are added at the end.  This
requires the srcpos type, define in srcpos.h, to be a list structure
with a next field.  This next field is initialized to NULL in
srcpos.h, in the macro YYLLOC_DEFAULT invoked implicitly by the
generated parser code.

Another change to srcpos.c is to make srcpos_copy always do a full
copy, including a copy of the file substructure.  This is required
because when dtc is used on the output of cpp, the successive detected
file names overwrite the file name in the file structure.  The next
field does not need to be deep copied, because it is always NULL when
srcpos_copy is called; an assert checks for this. File names are only
updated in uncopied position structures.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>