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https://issues.apache.org/jira/browse/THRIFT-2063?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13696313#comment-13696313
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Jens Geyer commented on THRIFT-2063:
------------------------------------
{quote}
The comparison operators == and != must be fully defined for operands of the
key type; thus the key type must not be a function, map, or slice. *+If the key
type is an interface type, these comparison operators must be defined for the
dynamic key values;+* failure will cause a run-time panic.
{quote}
[~traviscline] would it be possible to implement a workaround to this
Limitation? Like adding an interface to the key data where necessary, which
implements the required comparison operators?
> Go compiler cannot create code for maps with a map as key
> ---------------------------------------------------------
>
> Key: THRIFT-2063
> URL: https://issues.apache.org/jira/browse/THRIFT-2063
> Project: Thrift
> Issue Type: Bug
> Components: Go - Compiler
> Reporter: Remo Hertig
>
> trying to generate code for ThriftTest leads to:
> {code}
> ../../compiler/cpp/thrift --gen go ../ThriftTest.thrift
> [WARNING:/tbHD/Home/nairboon/dev/thrift/test/ThriftTest.thrift:41] No
> generator named 'noexist' could be found!
> [WARNING:/tbHD/Home/nairboon/dev/thrift/test/ThriftTest.thrift:42] cpp
> generator does not accept 'noexist' as sub-namespace!
> Error: Cannot produce a valid type for a Go map key: map[int32]bool -
> aborting.{code}
> the affected struct seems to be #3:
> {code}
> struct CrazyNesting {
> 1: string string_field,
> 2: optional set<Insanity> set_field,
> 3: required list< map<set<i32>,map<i32,set<list<map<Insanity,string>>>>>>
> list_field,
> 4: binary binary_field
> }
> {code}
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