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topojson: fix parsing empty topology

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This commit is contained in:
Mickey Rose 2018-08-10 21:03:07 +02:00
parent 6a3452da96
commit 2b8226316f
1 changed files with 6 additions and 2 deletions
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8
include/mapnik/json/topojson_grammar_x3_def.hpp
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@ -276,7 +276,7 @@ using x3::lit;
using x3::double_;
using x3::int_;
using x3::omit;
using x3::char_;
namespace
{
// import unicode string rule
@ -360,9 +360,13 @@ auto const bbox_def = lit("\"bbox\"") > lit(':')
;
// A topology must have an “objects” member whose value is an object.
// This object may have any number of members, whose value must be a geometry object.
auto const objects_def = lit("\"objects\"") > lit(':')
> lit('{')
> ((omit[*~char_(':')] > lit(':') > ((geometry_collection[push_collection] | geometry[push_geometry]))) % lit(','))
> -((omit[json_string] > ':' > ( geometry_collection[push_collection]
| geometry[push_geometry]
)) % ',')
> lit('}')
;