08987bd173
As it was, any error in a weighted mapping would return a very unhelpfull error message.
e.g. `nats-server: mappingtest.cfg:38:39: interface conversion: interface {} is []interface {}, not string`
This was because the line `err := &configErr{tk, fmt.Sprintf("Error adding mapping for %q to %q : %v", subj, v.(string), err)}` would panic on the `v.(string)` since in weighted mapping that interface{} is actually a map[string]interface{} (since there's can be more than one mapping in weighted mappings).
Now returns the actual error:
e.g. `nats-server: mappingtest.cfg:40:3: Error adding mapping for "bla" : invalid mapping destination: wildcard index out of range in {{wildcard(1)}}`
2: improves subject transform checking and catches if the destination is using a mapping function and there are no partial wildcards in the source.
Signed-off-by: Jean-Noël Moyne <jnmoyne@gmail.com>
NATS is a simple, secure and performant communications system for digital systems, services and devices. NATS is part of the Cloud Native Computing Foundation (CNCF). NATS has over 40 client language implementations, and its server can run on-premise, in the cloud, at the edge, and even on a Raspberry Pi. NATS can secure and simplify design and operation of modern distributed systems.
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