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A patch to allow yaml-cpp to compile with gcc and libcxx
Support for YAML Merge keys ( <<: [*dict1, *dict2] ) is added. The merge key is a specific scalar with value << (and tag !!merge) that implies that during node construction, the map (or sequence of maps) are merged into the current map. The priority rules are that each key from maps within the value associated with << are added iff the key is not yet present in the current map (and first map gets higher priority). Test cases have been added accordingly.
…the node) The problem is that const_map_to.get(*j->first) compares only the shared_ptr's, while we need to compare the key itself. v2: remove const iterator v3: fix use-after-free due to const reference
Consider the following YAML:
trait1: &t1
foo: 1
trait2: &t2
foo: 2
merged:
<<: *t1
<<: *t2
yq reports:
$ yq .merged.foo < /tmp/yaml
2
while the order that yaml-cpp returns is different, since it will
firstly handle 1, and will not replace it with 2:
$ util/parse < /tmp/yaml
trait1:
? &1 foo
: &2 1
trait2:
foo: 2
merged:
*1 : *2
(Don't mix up "*2" with "2", it is trait1)
* merge-operator: Fix order for merging iterator Fix merge operator support (that can be visible by iterating through the node) Fix merge-key handling in case the dictionary contains a sub-dictionary Adding support for handling YAML Merge Key (jbeder#41)
Update lib and apply PR for YAML Merge Key
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This is for ClickHouse/ClickHouse#75031
Which has been fixed in #1406