is duplicated by:

• SR-14431 Global completions at top level from module only appear after import statement

Issue Description:

@benlangmuir:

The real problem here is that consumeDecl wants to use IsTopLevel to mean TopLevelCode - i.e. a script or main.swift file, where you cannot make forward references at all - but the caller is passing in TopLevelLibrary as well, where forward references are fine. So we actually have the same bug already in e.g. inheritance completion where we only suggest the names earlier in the file.

Test case for inheritance completion:

$ cat t.swift 
class C {}
class E: #^A^# {}
class D {}

$ xcrun swift-ide-test -code-completion -code-completion-token=A -source-filename=t.swift | grep CurrMo
found code completion token A at offset 20
Decl[Class]/CurrModule:             C[#C#]; name=C

This should also find D.