NeverInfixPattern: implement own matching method

scalafmt-core/shared/src/main/scala/org/scalafmt/config/NeverInfixPattern.scala

@@ -3,28 +3,60 @@ package org.scalafmt.config
 import metaconfig._
 import metaconfig.generic.Surface
 
+import java.util.regex.{Matcher, Pattern}
+
 case class NeverInfixPattern(
-    includeFilters: Seq[String],
-    excludeFilters: Seq[String]
+    private val includeFilters: Seq[NeverInfixPattern.Filter], // partial match
+    private val excludeFilters: Seq[NeverInfixPattern.Filter] // strict match
 ) {
-  lazy val matcher: FilterMatcher = new FilterMatcher(
-    FilterMatcher.mkRegexp(includeFilters),
-    FilterMatcher.mkRegexp(excludeFilters, true)
-  )
-
   private[config] def forSbt: Option[NeverInfixPattern] =
     // if the user customized these, we don't touch
     if (excludeFilters ne NeverInfixPattern.default.excludeFilters) None
     else Some(copy(excludeFilters = NeverInfixPattern.sbtExclude))
+
+  def matches(op: String): Boolean =
+    includeFilters.forall(_.matches(op)(_.find())) &&
+      !excludeFilters.exists(_.matches(op)(_.matches()))
 }
 
 object NeverInfixPattern {
+
+  private[config] case class Filter(
+      op: Pattern
+  ) {
+    private def pattern: String = {
+      op.pattern()
+    }
+    def matches(op: String)(
+        f: Matcher => Boolean
+    ): Boolean =
+      f(this.op.matcher(op))
+  }
+
+  private object Filter {
+    implicit lazy val surface: Surface[Filter] = generic.deriveSurface
+    implicit lazy val encoder: ConfEncoder[Filter] =
+      ConfEncoder.instance(x => Conf.Str(x.pattern))
+    implicit lazy val decoder: ConfDecoderEx[Filter] =
+      ConfDecoderEx.fromPartial("String") { case (_, Conf.Str(x)) => parse(x) }
+
+    private def parse(str: String): Configured[Filter] = {
+      val op = str
+      if (op.isEmpty) Configured.error(s"empty infix op [$str]")
+      else {
+        Configured.Ok(Filter(op.r.pattern))
+      }
+    }
+
+    def apply(value: String): Filter = parse(value).get
+  }
+
   implicit lazy val surface: Surface[NeverInfixPattern] =
     generic.deriveSurface
   implicit lazy val codec: ConfCodecEx[NeverInfixPattern] =
     generic.deriveCodecEx(default).noTypos
   val default = NeverInfixPattern(
-    Seq("[\\w\\d_]+"),
+    Seq("[\\w\\d_]+").map(Filter.apply),
     Seq(
       "until",
       "to",
@@ -52,10 +84,10 @@ object NeverInfixPattern {
       "allElementsOf",
       "inOrderElementsOf",
       "theSameElementsAs"
-    )
+    ).map(Filter.apply)
   )
 
   private val sbtExclude = Seq(
     "cross"
-  ) ++ default.excludeFilters
+  ).map(Filter.apply) ++ default.excludeFilters
 }

scalafmt-core/shared/src/main/scala/org/scalafmt/rewrite/AvoidInfix.scala

@@ -4,7 +4,6 @@ import scala.annotation.tailrec
 import scala.meta._
 import scala.meta.internal.trees.PlaceholderChecks.hasPlaceholder
 
-import org.scalafmt.config.FilterMatcher
 import org.scalafmt.config.RewriteSettings
 import org.scalafmt.util.InfixApp
 
@@ -16,18 +15,11 @@ object AvoidInfix extends RewriteFactory {
   override def create(implicit ctx: RewriteCtx): RewriteSession =
     new AvoidInfix
 
-  def getMatcher(ctx: RewriteCtx): FilterMatcher =
-    ctx.style.rewrite.neverInfix.matcher
-
-  def getMatcherIfEnabled(ctx: RewriteCtx): Option[FilterMatcher] =
-    if (ctx.style.rewrite.rules.contains(AvoidInfix)) Some(getMatcher(ctx))
-    else None
-
 }
 
 class AvoidInfix(implicit ctx: RewriteCtx) extends RewriteSession {
 
-  private val matcher = AvoidInfix.getMatcher(ctx)
+  private val matcher = ctx.style.rewrite.neverInfix
 
   // In a perfect world, we could just use
   // Tree.transform {
@@ -88,7 +80,8 @@ class AvoidInfix(implicit ctx: RewriteCtx) extends RewriteSession {
   @tailrec
   private def checkMatchingInfix(ai: Term.ApplyInfix): Boolean = {
     val op = ai.op.value
-    InfixApp.isLeftAssoc(op) && matcher.matches(op) && (ai.argClause match {
+    InfixApp.isLeftAssoc(op) && matcher.matches(op) &&
+    (ai.argClause match {
       case ac @ Term.ArgClause(arg :: Nil, _) if !isWrapped(ac) =>
         !hasPlaceholder(arg, ctx.style.rewrite.allowInfixPlaceholderArg)
       case _ => true