id,summary,reporter,owner,description,type,status,priority,component,severity,resolution,keywords,cc
140,Plain equal sign (=) as node content results in an error,pyyaml@…,xi,"A plain equal sign (=) as node fails as invalid YAML.

== STEPS TO REPRODUCE ==

Load this document
{{{
=
}}}

== EXPECTED RESULTS ==

A plain equal sign used as anything other than a key should be the String type (tag:yaml.org,2002:str).

The above document should result in this canonical document:
{{{
%YAML 1.1
---
!!str ""=""
...
}}}

With this node structure:

{{{
ScalarNode(tag=u'tag:yaml.org,2002:str', value=u'=')
}}}

That is it should have been equivalent to this document:

{{{
""=""
}}}

== ACTUAL RESULTS ==

Attempts to treat equal sign as the [http://yaml.org/type/value.html Value Key] type (tag:yaml.org,2002:value) and throws this error:

{{{
The document is not valid YAML:
could not determine a constructor for the tag 'tag:yaml.org,2002:value'
  in """", line 1, column 1:
    =
    ^
}}}

== NOTES ==

Here's an example of equal sign correctly being treated as the Value Key type:

{{{
= : 1
}}}

Producing this canonical document and node:

{{{
%YAML 1.1
---
!!map {
    ? !!str ""=""
    : !!int ""1"",
}
...
}}}

{{{
MappingNode(tag=u'tag:yaml.org,2002:map', value=[(ScalarNode(tag=u'tag:yaml.org,2002:value', value=u'='),
 ScalarNode(tag=u'tag:yaml.org,2002:int', value=u'1'))])
}}}

The document in STEPS TO REPRODUCE is the simplest document that fails, but these documents also fail:

{{{
- =
}}}

{{{
a: =
}}}
",defect,new,normal,pyyaml,normal,,,