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Rather than stuffing a ConfigState instance into a separate SpewState,
just add the functionality directly to the ConfigState. This provides
simpler syntax for the consumer.
One side effect of this change is that, unlike a zero value SpewState, a
zero value ConfigState doesn't provide default values which means the
Indent field is set to provide no indentation. The consumer is now
expected to set the indent to their desired value when declaring an
instance of ConfigState.
Alternatively, the consumer can call a new function, NewDefaultConfig,
which returns a ConfigState with default values, including a default
indentation of a single space.
For example, to change the indent to a tab, the previous syntax was:
ss := new(spew.SpewState) // or var ss spew.SpewState
scs := ss.Config()
scs.Indent = "\t"
scs.Dump(whatever)
The new syntax is simply:
scs := spew.ConfigState{Indent: "\t"}
scs.Dump(whatever)
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This commit implements feature request #3. In particular, it allows the
formatter to respond to %#v and %#+v. The # flag (%#v) adds type
information to the output and the combination of the # and + flags (%#+v)
adds both type information and pointer information. This allows the
consumer a choice between displaying types, pointer information, or both.
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This commit adds a new type, SpewState, which can be used to create
instances with unique configuration options. The methods of SpewState are
equivalent to the top-level functions. Full documentation and examples
are included.
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