[groovy] add TRANSFORMATION compile phase

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/psi/util/groovyClassImplUtil.kt

@@ -4,8 +4,10 @@ package org.jetbrains.plugins.groovy.lang.psi.util
 import com.intellij.psi.ResolveState
 import com.intellij.psi.scope.PsiScopeProcessor
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.GrTypeDefinition
+import org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.getFields
 import org.jetbrains.plugins.groovy.lang.resolve.CompilationPhaseHint
 import org.jetbrains.plugins.groovy.lang.resolve.CompilationPhaseHint.Phase.CONVERSION
+import org.jetbrains.plugins.groovy.lang.resolve.CompilationPhaseHint.Phase.TRANSFORMATION
 import org.jetbrains.plugins.groovy.lang.resolve.ResolveUtil.processElement
 import org.jetbrains.plugins.groovy.lang.resolve.shouldProcessFields
 
@@ -13,6 +15,7 @@ fun GrTypeDefinition.processPhase(processor: PsiScopeProcessor, state: ResolveSt
   val hint = requireNotNull(processor.getHint(CompilationPhaseHint.HINT_KEY))
   return when (hint.beforePhase()) {
     CONVERSION -> processBeforeConversion(processor, state)
+    TRANSFORMATION -> processBeforeTransformations(processor, state)
   }
 }
 
@@ -24,3 +27,12 @@ private fun GrTypeDefinition.processBeforeConversion(processor: PsiScopeProcesso
   }
   return true
 }
+
+private fun GrTypeDefinition.processBeforeTransformations(processor: PsiScopeProcessor, state: ResolveState): Boolean {
+  if (processor.shouldProcessFields()) {
+    for (codeField in getFields(this, false)) { // property nodes removed if field with same name exists
+      if (!processElement(processor, codeField, state)) return false
+    }
+  }
+  return true
+}

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/resolve/CompilationPhaseHint.java

@@ -9,7 +9,8 @@ public interface CompilationPhaseHint {
   Key<CompilationPhaseHint> HINT_KEY = Key.create("groovy.compilation.phase");
 
   enum Phase {
-    CONVERSION
+    CONVERSION,
+    TRANSFORMATION
   }
 
   @NotNull