From 921a9267da1a928e4eba733da75dc66cfb601f59 Mon Sep 17 00:00:00 2001
From: Kacper Korban <kacper.f.korban@gmail.com>
Date: Tue, 14 May 2024 22:04:44 +0200
Subject: [PATCH] Correctly handle backticked macro keyword in Scala 3

---
 sourcecode/src-3/sourcecode/Macros.scala         | 13 ++++++++++++-
 sourcecode/test/src/sourcecode/SpecialName.scala | 13 +++++++++++++
 sourcecode/test/src/sourcecode/Tests.scala       |  1 +
 3 files changed, 26 insertions(+), 1 deletion(-)
 create mode 100644 sourcecode/test/src/sourcecode/SpecialName.scala

diff --git a/sourcecode/src-3/sourcecode/Macros.scala b/sourcecode/src-3/sourcecode/Macros.scala
index 995f77e..8df1c84 100644
--- a/sourcecode/src-3/sourcecode/Macros.scala
+++ b/sourcecode/src-3/sourcecode/Macros.scala
@@ -64,7 +64,18 @@ trait ArgsMacros {
 }
 
 object Util{
-  def isSynthetic(using Quotes)(s: quotes.reflect.Symbol) = isSyntheticName(getName(s))
+  def isSynthetic(using Quotes)(s: quotes.reflect.Symbol) =
+    isSyntheticAlt(s)
+
+  def isSyntheticAlt(using Quotes)(s: quotes.reflect.Symbol) = {
+    import quotes.reflect._
+    s.flags.is(Flags.Synthetic) || s.isClassConstructor || s.isLocalDummy || isScala2Macro(s)
+  }
+  def isScala2Macro(using Quotes)(s: quotes.reflect.Symbol) = {
+    import quotes.reflect._
+    (s.flags.is(Flags.Macro) && s.owner.flags.is(Flags.Scala2x)) ||
+      (s.flags.is(Flags.Macro) && !s.flags.is(Flags.Inline))
+  }
   def isSyntheticName(name: String) = {
     name == "<init>" || (name.startsWith("<local ") && name.endsWith(">")) || name == "$anonfun" || name == "macro"
   }
diff --git a/sourcecode/test/src/sourcecode/SpecialName.scala b/sourcecode/test/src/sourcecode/SpecialName.scala
new file mode 100644
index 0000000..f09362e
--- /dev/null
+++ b/sourcecode/test/src/sourcecode/SpecialName.scala
@@ -0,0 +1,13 @@
+package sourcecode
+
+object SpecialName {
+
+  def macroValRun() = {
+    def keyword(implicit name: sourcecode.Name): String = name.value
+
+    val `macro` = keyword
+
+    assert(`macro` == "macro")
+  }
+
+}
diff --git a/sourcecode/test/src/sourcecode/Tests.scala b/sourcecode/test/src/sourcecode/Tests.scala
index 4bfd38b..6a8f881 100644
--- a/sourcecode/test/src/sourcecode/Tests.scala
+++ b/sourcecode/test/src/sourcecode/Tests.scala
@@ -18,6 +18,7 @@ object Tests{
     EnumFull.run()
     NoSynthetic.run()
     Synthetic.run()
+    SpecialName.macroValRun()
     ManualImplicit()
     TextTests()
     ArgsTests()