Remove Macro flag from Dotty macros #4855
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* top-level ~ must contain a call to a static method * arguments must be quoted * inline arguments can be passed directly * removed dependency on the original inlined code (removed in PostTyper) * ReifyQuotes is no longer an InfoTransformer * Splicer implements both checking and evaluation of splices in a single abstraction * Fix scala#4773 * Fix scala#4735
Now all levels are relative to the definition site. 0 is the level of all non-staged definitions, -1 is the level of the contents of a top level splice (in an inline method) and positive levels are (as before) staging levels.
Allow top-level ~ in and non static transparent method: * Class methods (including inner and anonymous classes) * Methods in def/val/var
For example a transparent method can be defined as ``` transparent def foo(b: Boolean): Int = if (b) ~bar(true) else ~bar(false) ``` Removing this restriction also allows us to have a simpler implementation of splicing and transparent def checking. Removes last use of `Macro` flag in `ReifyQuotes`.
The Macro flag is now only for Scala 2 macros
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Based on #4826