Add occurrences of secondary constructors

compiler/src/dotty/tools/dotc/semanticdb/ExtractSemanticDB.scala

@@ -324,8 +324,15 @@ class ExtractSemanticDB extends Phase:
           if content.lift(span.end - 1).map(_ == '`').getOrElse(false) then
             (span.start + 1, span.end - 1)
           else (span.start, span.end)
-        val target = if sym.isPackageObject then sym.owner else sym
-        content.slice(start, end).mkString == target.name.stripModuleClassSuffix.lastPart.toString
+        val nameInSource = content.slice(start, end).mkString
+        // for secondary constructors `this`
+        if sym.isConstructor && nameInSource == nme.THISkw.toString then
+          true
+        else
+          val target =
+            if sym.isPackageObject then sym.owner
+            else sym
+          nameInSource == target.name.stripModuleClassSuffix.lastPart.toString
 
     private def spanOfSymbol(sym: Symbol, span: Span, treeSource: SourceFile)(using Context): Span =
       val contents = if treeSource.exists then treeSource.content() else Array.empty[Char]

tests/semanticdb/expect/Annotations.expect.scala

@@ -21,7 +21,7 @@ class Annotations/*<-annot::Annotations#*/[@TypeParameterAnnotation/*->com::java
 
 class B/*<-annot::B#*/ @ConstructorAnnotation/*->com::javacp::annot::ConstructorAnnotation#*/()(x/*<-annot::B#x.*/: Int/*->scala::Int#*/) {
   @ConstructorAnnotation/*->com::javacp::annot::ConstructorAnnotation#*/
-  def this() = this(42)
+  def this/*<-annot::B#`<init>`(+1).*/() = this(42)
 }
 
 @ObjectAnnotation/*->com::javacp::annot::ObjectAnnotation#*/

tests/semanticdb/expect/EndMarkers.expect.scala

@@ -1,9 +1,9 @@
 package endmarkers:
 
   class MultiCtor/*<-endmarkers::MultiCtor#*/(val i/*<-endmarkers::MultiCtor#i.*/: Int/*->scala::Int#*/):
-    def this() =
+    def this/*<-endmarkers::MultiCtor#`<init>`(+1).*/() =
       this(23)
-    end this
+    end this/*->endmarkers::MultiCtor#`<init>`(+1).*/
   end MultiCtor/*->endmarkers::MultiCtor#*/
 
   def topLevelMethod/*<-endmarkers::EndMarkers$package.topLevelMethod().*/: String/*->scala::Predef.String#*/ =

tests/semanticdb/expect/semanticdb-Flags.expect.scala

@@ -8,8 +8,8 @@ package object p/*<-flags::p::package.*/ {
   def z/*<-flags::p::package.z().*/(pp/*<-flags::p::package.z().(pp)*/: Int/*->scala::Int#*/) = 3
   def m/*<-flags::p::package.m().*/[TT/*<-flags::p::package.m().[TT]*/]: Int/*->scala::Int#*/ = macro ???/*->scala::Predef.`???`().*/
   abstract class C/*<-flags::p::package.C#*/[+T/*<-flags::p::package.C#[T]*/, -U/*<-flags::p::package.C#[U]*/, V/*<-flags::p::package.C#[V]*/](x/*<-flags::p::package.C#x.*/: T/*->flags::p::package.C#[T]*/, y/*<-flags::p::package.C#y.*/: U/*->flags::p::package.C#[U]*/, z/*<-flags::p::package.C#z.*/: V/*->flags::p::package.C#[V]*/) {
-    def this() = this(???/*->scala::Predef.`???`().*/, ???/*->scala::Predef.`???`().*/, ???/*->scala::Predef.`???`().*/)
-    def this(t/*<-flags::p::package.C#`<init>`(+2).(t)*/: T/*->flags::p::package.C#[T]*/) = this(t/*->flags::p::package.C#`<init>`(+2).(t)*/, ???/*->scala::Predef.`???`().*/, ???/*->scala::Predef.`???`().*/)
+    def this/*<-flags::p::package.C#`<init>`(+1).*/() = this(???/*->scala::Predef.`???`().*/, ???/*->scala::Predef.`???`().*/, ???/*->scala::Predef.`???`().*/)
+    def this/*<-flags::p::package.C#`<init>`(+2).*/(t/*<-flags::p::package.C#`<init>`(+2).(t)*/: T/*->flags::p::package.C#[T]*/) = this(t/*->flags::p::package.C#`<init>`(+2).(t)*/, ???/*->scala::Predef.`???`().*/, ???/*->scala::Predef.`???`().*/)
     def w/*<-flags::p::package.C#w().*/: Int/*->scala::Int#*/
   }
   type T1/*<-flags::p::package.T1#*/ = Int/*->scala::Int#*/

tests/semanticdb/metac.expect

@@ -210,7 +210,7 @@ Uri => Annotations.scala
 Text => empty
 Language => Scala
 Symbols => 22 entries
-Occurrences => 47 entries
+Occurrences => 48 entries
 
 Symbols:
 annot/Alias. => final object Alias extends Object { self: Alias.type => +2 decls }
@@ -271,6 +271,7 @@ Occurrences:
 [21:33..21:34): x <- annot/B#x.
 [21:36..21:39): Int -> scala/Int#
 [22:3..22:24): ConstructorAnnotation -> com/javacp/annot/ConstructorAnnotation#
+[23:6..23:10): <- annot/B#`<init>`(+1).
 [26:1..26:17): ObjectAnnotation -> com/javacp/annot/ObjectAnnotation#
 [27:7..27:8): M <- annot/M.
 [28:3..28:18): MacroAnnotation -> com/javacp/annot/MacroAnnotation#
@@ -660,7 +661,7 @@ Uri => EndMarkers.scala
 Text => empty
 Language => Scala
 Symbols => 24 entries
-Occurrences => 35 entries
+Occurrences => 37 entries
 
 Symbols:
 endmarkers/Container# => class Container extends Object { self: Container => +5 decls }
@@ -693,6 +694,8 @@ Occurrences:
 [2:8..2:17): MultiCtor <- endmarkers/MultiCtor#
 [2:22..2:23): i <- endmarkers/MultiCtor#i.
 [2:25..2:28): Int -> scala/Int#
+[3:8..3:12): <- endmarkers/MultiCtor#`<init>`(+1).
+[5:8..5:12): this -> endmarkers/MultiCtor#`<init>`(+1).
 [6:6..6:15): MultiCtor -> endmarkers/MultiCtor#
 [8:6..8:20): topLevelMethod <- endmarkers/EndMarkers$package.topLevelMethod().
 [8:22..8:28): String -> scala/Predef.String#
@@ -3881,7 +3884,7 @@ Uri => semanticdb-Flags.scala
 Text => empty
 Language => Scala
 Symbols => 50 entries
-Occurrences => 71 entries
+Occurrences => 73 entries
 
 Symbols:
 flags/p/package. => final package object p extends Object { self: p.type => +23 decls }
@@ -3963,9 +3966,11 @@ Occurrences:
 [9:39..9:40): U -> flags/p/package.C#[U]
 [9:42..9:43): z <- flags/p/package.C#z.
 [9:45..9:46): V -> flags/p/package.C#[V]
+[10:8..10:12): <- flags/p/package.C#`<init>`(+1).
 [10:22..10:25): ??? -> scala/Predef.`???`().
 [10:27..10:30): ??? -> scala/Predef.`???`().
 [10:32..10:35): ??? -> scala/Predef.`???`().
+[11:8..11:12): <- flags/p/package.C#`<init>`(+2).
 [11:13..11:14): t <- flags/p/package.C#`<init>`(+2).(t)
 [11:16..11:17): T -> flags/p/package.C#[T]
 [11:26..11:27): t -> flags/p/package.C#`<init>`(+2).(t)