Fixed completion list sorting so that "shouldCompleteTopLevelCallablesFromIndex" not be first when typing "st"

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/BasicCompletionSession.kt

@@ -497,7 +497,7 @@ class BasicCompletionSession(
 
         override fun addWeighers(sorter: CompletionSorter): CompletionSorter {
             if (shouldCompleteParameterNameAndType()) {
-                return sorter.weighBefore(DeprecatedWeigher.toString(), ParameterNameAndTypeCompletion.Weigher)
+                return sorter.weighBefore("prefix", ParameterNameAndTypeCompletion.Weigher)
             }
             return sorter
         }

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/CompletionSession.kt

@@ -21,6 +21,7 @@ import com.intellij.codeInsight.completion.CompletionResultSet
 import com.intellij.codeInsight.completion.CompletionSorter
 import com.intellij.codeInsight.completion.CompletionUtil
 import com.intellij.codeInsight.completion.impl.CamelHumpMatcher
+import com.intellij.codeInsight.completion.impl.RealPrefixMatchingWeigher
 import com.intellij.codeInsight.lookup.LookupElement
 import com.intellij.patterns.PatternCondition
 import com.intellij.patterns.StandardPatterns
@@ -244,6 +245,9 @@ abstract class CompletionSession(
 
         sorter = sorter.weighBefore("middleMatching", PreferMatchingItemWeigher)
 
+        // we insert one more RealPrefixMatchingWeigher because one inserted in default sorter is placed in a bad position (after "stats")
+        sorter = sorter.weighAfter("lift.shorter", RealPrefixMatchingWeigher())
+
         sorter = sorter.weighAfter("kotlin.proximity", ByNameAlphabeticalWeigher, PreferLessParametersWeigher)
 
         return sorter

idea/idea-completion/testData/weighers/basic/Prefix.kt

@@ -0,0 +1,8 @@
+fun shouldCompleteTopLevelCallablesFromIndex() = true
+
+fun foo(statement: String) {
+    if (st<caret>)
+}
+
+// ORDER: statement
+// ORDER: shouldCompleteTopLevelCallablesFromIndex

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/weighers/BasicCompletionWeigherTestGenerated.java

@@ -167,6 +167,12 @@ public class BasicCompletionWeigherTestGenerated extends AbstractBasicCompletion
         doTest(fileName);
     }
 
+    @TestMetadata("Prefix.kt")
+    public void testPrefix() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/weighers/basic/Prefix.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("PropertiesBeforeKeywords.kt")
     public void testPropertiesBeforeKeywords() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/weighers/basic/PropertiesBeforeKeywords.kt");