One-liner annotation causes validation error inside block

Im trying to create annotation plugin to inject child components into parent as members (similar to some android frameworks)

The clearest syntax I discovered so far is:

@inject m.someChild = {} // to be changed to: m.someChild = m.top.findNode("someChild")

or

@inject("name") m.someChild = {} // to be changed to: m.someChild = m.top.findNode("name")

Unfortunately such construct causes parsing error (BS1039: Expected newline or ':' at the end of a statement), even though annotation feature description says it should be possible to do it inline.

Split into two lines works,

@inject 
m.someChild = {}

@inject 
m.otherChild = {}

@inject 
m.yetAnotherChild = {}

----------- vs ------------

@inject m.someChild = {}
@inject m.otherChild = {}
@inject m.yetAnotherChild = {}

but then code base explodes and doesn't look neat.
Btw: if you are aware of cleaner syntax, let me know. Ideally it could look like @inject m.someChild but it's not an expression then

Reproduce the BS1039 error with the inline @inject examples from the issue, then inspect the annotation parsing and validation entry points. Done means the one-line forms parse without BS1039 while the existing split-line forms continue to work, with a regression test if this syntax has test coverage.