Made precedence common between parsers and printers

1 files changed, 32 insertions, 0 deletions

diff --git a/src/dotty/tools/dotc/parsing/package.scala b/src/dotty/tools/dotc/parsing/package.scala
new file mode 100644
index 000000000..b829bd313
--- /dev/null
+++ b/src/dotty/tools/dotc/parsing/package.scala
@@ -0,0 +1,32 @@
+package dotty.tools.dotc
+
+import util.Chars._
+import core.Names.Name
+import core.StdNames.nme
+import core.NameOps._
+
+package object parsing {
+
+  def precedence(operator: Name): Int =
+    if (operator eq nme.ERROR) -1
+    else {
+      val firstCh = operator(0)
+      if (isScalaLetter(firstCh)) 1
+      else if (operator.isOpAssignmentName) 0
+      else firstCh match {
+        case '|' => 2
+        case '^' => 3
+        case '&' => 4
+        case '=' | '!' => 5
+        case '<' | '>' => 6
+        case ':' => 7
+        case '+' | '-' => 8
+        case '*' | '/' | '%' => 9
+        case _ => 10
+      }
+    }
+
+  def minPrec = 0
+  def maxPrec = 10
+
+}
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