Merge pull request #8479 from RazvanN7/Refactor

Move semantic methods out of expression.d

Author: wilzbach

src/dmd/attrib.d

@@ -21,6 +21,7 @@ import dmd.dscope;
 import dmd.dsymbol;
 import dmd.dsymbolsem;
 import dmd.expression;
+import dmd.expressionsem;
 import dmd.func;
 import dmd.globals;
 import dmd.hdrgen;