diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/BackslashChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/BackslashChannel.java
index 8fa45142a1..55ffbdd01c 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/channels/BackslashChannel.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/BackslashChannel.java
@@ -25,21 +25,23 @@
 
 public class BackslashChannel extends Channel<Lexer> {
 
-  private static boolean isNewLine(char ch) {
-    return (ch == '\n') || (ch == '\r');
-  }
+  private final StringBuilder sb = new StringBuilder(256);
 
   @Override
   public boolean consume(CodeReader code, Lexer output) {
-    var ch = (char) code.peek();
-
-    if ((ch == '\\') && isNewLine(code.charAt(1))) {
-      // just throw away the backslash
-      code.pop();
-      return true;
+    if (code.charAt(0) != '\\') {
+      return false;
     }
 
-    return false;
+    var lineSplicing = read(code, sb);
+    sb.delete(0, sb.length());
+    return lineSplicing != 0;
+  }
+
+  public static int read(CodeReader code, StringBuilder sb) {
+    var end = ChannelUtils.handleLineSplicing(code, 0);
+    code.skip(end); // remove line splicing
+    return end;
   }
 
 }
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/ChannelUtils.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/ChannelUtils.java
new file mode 100644
index 0000000000..0d4180c560
--- /dev/null
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/ChannelUtils.java
@@ -0,0 +1,88 @@
+/*
+ * C++ Community Plugin (cxx plugin)
+ * Copyright (C) 2010-2023 SonarOpenCommunity
+ * http://github.com/SonarOpenCommunity/sonar-cxx
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.cxx.channels;
+
+import org.sonar.cxx.sslr.channel.CodeReader;
+
+public class ChannelUtils {
+
+  public static final char LF = '\n';
+  public static final char CR = '\r';
+  public static final char EOF = (char) -1;
+
+  private ChannelUtils() {
+    // empty
+  }
+
+  public static boolean isNewLine(char ch) {
+    return (ch == LF) || (ch == CR);
+  }
+
+  public static boolean isWhitespace(char ch) {
+    return (ch == ' ') || (ch == '\t');
+  }
+
+  public static boolean isSuffix(char c) {
+    return Character.isLowerCase(c) || Character.isUpperCase(c) || (c == '_');
+  }
+
+  /**
+   * Handle line splicing.
+   * - lines terminated by a \ are spliced together with the next line
+   * - P2178R0 making trailing whitespaces non-significant
+   *
+   * line endings:
+   * - Linux/Unix, Mac from OS X a.k.a macOS: LF
+   * - Windows/DOS: CR LF
+   * - Classic Mac OS: CR
+   *
+   * @return numbers of sign to remove to splice the lines
+   */
+  public static int handleLineSplicing(CodeReader code, int start) {
+    int next = start;
+    if (code.charAt(next) != '\\') {
+      return 0;
+    }
+
+    boolean newline = false;
+    next++;
+    while (true) {
+      var charAt = code.charAt(next);
+      if (charAt == LF) {
+        newline = true;
+        break;
+      }
+      if (charAt == CR) {
+        if (code.charAt(next + 1) == LF) {
+          next++;
+        }
+        newline = true;
+        break;
+      }
+      if (!isWhitespace(charAt)) {
+        break;
+      }
+      next++;
+    }
+
+    return newline ? (next - start + 1) : 0;
+  }
+
+}
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/CharacterLiteralsChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/CharacterLiteralsChannel.java
index 3d7d9dd6fd..5c14ba57bd 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/channels/CharacterLiteralsChannel.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/CharacterLiteralsChannel.java
@@ -30,8 +30,6 @@
  */
 public class CharacterLiteralsChannel extends Channel<Lexer> {
 
-  private static final char EOF = (char) -1;
-
   private final StringBuilder sb = new StringBuilder(256);
 
   private int index = 0;
@@ -67,7 +65,7 @@ public boolean consume(CodeReader code, Lexer output) {
   private boolean read(CodeReader code) {
     index++;
     while (code.charAt(index) != ch) {
-      if (code.charAt(index) == EOF) {
+      if (code.charAt(index) == ChannelUtils.EOF) {
         return false;
       }
       if (code.charAt(index) == '\\') {
@@ -95,10 +93,10 @@ private void readUdSuffix(CodeReader code) {
     int len = 0;
     for (int start_index = index;; index++) {
       var charAt = code.charAt(index);
-      if (charAt == EOF) {
+      if (charAt == ChannelUtils.EOF) {
         return;
       }
-      if (isSuffix(charAt)) {
+      if (ChannelUtils.isSuffix(charAt)) {
         len++;
       } else if (Character.isDigit(charAt)) {
         if (len > 0) {
@@ -113,8 +111,4 @@ private void readUdSuffix(CodeReader code) {
     }
   }
 
-  private static boolean isSuffix(char c) {
-    return Character.isLowerCase(c) || Character.isUpperCase(c) || (c == '_');
-  }
-
 }
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/KeywordChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/KeywordChannel.java
index c22349eb8c..37e4389a18 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/channels/KeywordChannel.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/KeywordChannel.java
@@ -38,8 +38,7 @@ public class KeywordChannel extends Channel<Lexer> {
   private final Matcher matcher;
   private final Token.Builder tokenBuilder = Token.builder();
 
-  public KeywordChannel(String regexp, TokenType[]
-    ... keywordSets) {
+  public KeywordChannel(String regexp, TokenType[]... keywordSets) {
     for (var keywords : keywordSets) {
       for (var keyword : keywords) {
         keywordsMap.put(keyword.getValue(), keyword);
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/MultiLineCommentChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/MultiLineCommentChannel.java
new file mode 100644
index 0000000000..c1f1e5947e
--- /dev/null
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/MultiLineCommentChannel.java
@@ -0,0 +1,111 @@
+/*
+ * C++ Community Plugin (cxx plugin)
+ * Copyright (C) 2010-2023 SonarOpenCommunity
+ * http://github.com/SonarOpenCommunity/sonar-cxx
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.cxx.channels;
+
+import static com.sonar.cxx.sslr.api.GenericTokenType.COMMENT;
+import com.sonar.cxx.sslr.api.Token;
+import com.sonar.cxx.sslr.api.Trivia;
+import com.sonar.cxx.sslr.impl.Lexer;
+import org.sonar.cxx.sslr.channel.Channel;
+import org.sonar.cxx.sslr.channel.CodeReader;
+
+public class MultiLineCommentChannel extends Channel<Lexer> {
+
+  private final StringBuilder sb = new StringBuilder(256);
+  private final Token.Builder tokenBuilder = Token.builder();
+
+  @Override
+  public boolean consume(CodeReader code, Lexer lexer) {
+    // start of multi line comment?
+    int next = isComment(code);
+    if (next == 0) {
+      return false;
+    }
+
+    int line = code.getLinePosition();
+    int column = code.getColumnPosition();
+
+    code.skip(next);
+    sb.append('/');
+    sb.append('*');
+
+    read(code, sb); // search end of multi line comment
+
+    var value = sb.toString();
+    var token = tokenBuilder
+      .setType(COMMENT)
+      .setValueAndOriginalValue(value)
+      .setURI(lexer.getURI())
+      .setLine(line)
+      .setColumn(column)
+      .build();
+
+    lexer.addTrivia(Trivia.createComment(token));
+    sb.delete(0, sb.length());
+    return true;
+  }
+
+  public static int isComment(CodeReader code) {
+    int next = 0;
+
+    // start of multi line comment?
+    if (code.charAt(next) != '/') {
+      return 0;
+    }
+    next += 1;
+    next += ChannelUtils.handleLineSplicing(code, next);
+
+    if (code.charAt(next) != '*') {
+      return 0;
+    }
+    next += 1;
+    return next;
+  }
+
+  public static boolean read(CodeReader code, StringBuilder sb) {
+    boolean first = false;
+    while (true) { // search end of multi line comment: */
+      var end = ChannelUtils.handleLineSplicing(code, 0);
+      code.skip(end); // remove line splicing
+
+      var charAt = (char) code.pop();
+      switch (charAt) {
+        case '*':
+          first = true;
+          break;
+        case '/':
+          if (first) {
+            sb.append('/');
+            return true;
+          }
+          break;
+        case ChannelUtils.EOF:
+          return false;
+        default:
+          first = false;
+          break;
+      }
+
+      sb.append(charAt);
+    }
+
+  }
+
+}
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/PreprocessorChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/PreprocessorChannel.java
index 0f8822d4bb..2b5421f564 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/channels/PreprocessorChannel.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/PreprocessorChannel.java
@@ -34,9 +34,9 @@
 //
 public class PreprocessorChannel extends Channel<Lexer> {
 
-  private static final char EOF = (char) -1;
   private final StringLiteralsChannel stringLiteralsChannel = new StringLiteralsChannel();
   private final StringBuilder sb = new StringBuilder(256);
+  private final StringBuilder dummy = new StringBuilder(256);
   private final Matcher matcher;
 
   public PreprocessorChannel(TokenType[]... keywordSets) {
@@ -84,67 +84,46 @@ public boolean consume(CodeReader code, Lexer output) {
 
   private void read(CodeReader code) {
     while (true) {
-      var ch = code.charAt(0);
-      if (isNewline(ch) || ch == EOF) {
+      var charAt = code.charAt(0);
+      if (ChannelUtils.isNewLine(charAt) || charAt == ChannelUtils.EOF) {
         code.pop();
         break;
-      } else if (stringLiteralsChannel.read(code, sb)) {
+      } else if (stringLiteralsChannel.read(code, sb)) { // string literal
         continue;
       }
-      ch = (char) code.pop();
-      if (ch == '/' && code.charAt(0) == '/') {
-        consumeSingleLineComment(code);
-      } else if (ch == '/' && code.charAt(0) == '*') {
-        consumeMultiLineComment(code);
-      } else if (ch == '\\' && isNewline((char) code.peek())) {
-        // the newline is escaped: we have a the multi line preprocessor directive
-        // consume both the backslash and the newline, insert a space instead
-        consumeNewline(code);
-        sb.append(' ');
-      } else {
-        sb.append(ch);
-      }
-    }
-  }
 
-  private static void consumeNewline(CodeReader code) {
-    if ((code.charAt(0) == '\r') && (code.charAt(1) == '\n')) {
-      // \r\n
-      code.pop();
-      code.pop();
-    } else {
-      // \r or \n
-      code.pop();
-    }
-  }
-
-  private static void consumeSingleLineComment(CodeReader code) {
-    code.pop(); // initial '/'
-    while (true) {
-      var charAt = code.charAt(0);
-      if (isNewline(charAt) || charAt == EOF) {
-        break;
+      var len = 0;
+      switch (charAt) {
+        case '/': // comment?
+          len = SingleLineCommentChannel.isComment(code);
+          if (len != 0) {
+            // single line comment
+            code.skip(len);
+            SingleLineCommentChannel.read(code, dummy);
+            dummy.delete(0, dummy.length());
+          } else {
+            len = MultiLineCommentChannel.isComment(code);
+            if (len != 0) {
+              // multi line comment
+              code.skip(len);
+              MultiLineCommentChannel.read(code, dummy);
+              dummy.delete(0, dummy.length());
+            }
+          }
+          break;
+        case '\\':
+          len = BackslashChannel.read(code, dummy);
+          if (len != 0) {
+            // consume backslash and the newline
+            dummy.delete(0, dummy.length());
+          }
+          break;
       }
-      code.pop();
-    }
-  }
 
-  private static void consumeMultiLineComment(CodeReader code) {
-    code.pop(); // initial '*'
-    while (true) {
-      var ch = (char) code.pop();
-      if (ch == EOF) {
-        return;
-      }
-      if (ch == '*' && code.charAt(0) == '/') {
-        code.pop();
-        return;
+      if (len == 0) {
+        sb.append((char) code.pop());
       }
     }
   }
 
-  private static boolean isNewline(char ch) {
-    return (ch == '\n') || (ch == '\r');
-  }
-
 }
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/RightAngleBracketsChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/RightAngleBracketsChannel.java
index 49cc23070f..7c5f33cd81 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/channels/RightAngleBracketsChannel.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/RightAngleBracketsChannel.java
@@ -48,10 +48,9 @@ public class RightAngleBracketsChannel extends Channel<Lexer> {
 
   @Override
   public boolean consume(CodeReader code, Lexer output) {
-    var ch = (char) code.peek();
     var consumed = false;
 
-    switch (ch) {
+    switch (code.charAt(0)) {
       case '(':
         if (angleBracketLevel > 0) {
           parentheseLevel++;
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/SingleLineCommentChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/SingleLineCommentChannel.java
new file mode 100644
index 0000000000..a17af4bf68
--- /dev/null
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/SingleLineCommentChannel.java
@@ -0,0 +1,98 @@
+/*
+ * C++ Community Plugin (cxx plugin)
+ * Copyright (C) 2010-2023 SonarOpenCommunity
+ * http://github.com/SonarOpenCommunity/sonar-cxx
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.cxx.channels;
+
+import static com.sonar.cxx.sslr.api.GenericTokenType.COMMENT;
+import com.sonar.cxx.sslr.api.Token;
+import com.sonar.cxx.sslr.api.Trivia;
+import com.sonar.cxx.sslr.impl.Lexer;
+import org.sonar.cxx.sslr.channel.Channel;
+import org.sonar.cxx.sslr.channel.CodeReader;
+
+public class SingleLineCommentChannel extends Channel<Lexer> {
+
+  private final StringBuilder sb = new StringBuilder(256);
+  private final Token.Builder tokenBuilder = Token.builder();
+
+  @Override
+  public boolean consume(CodeReader code, Lexer lexer) {
+    // start of single line comment?
+    int next = isComment(code);
+    if (next == 0) {
+      return false;
+    }
+
+    int line = code.getLinePosition();
+    int column = code.getColumnPosition();
+
+    code.skip(next);
+    sb.append('/');
+    sb.append('/');
+
+    // search end of line
+    read(code, sb);
+
+    var value = sb.toString();
+    var token = tokenBuilder
+      .setType(COMMENT)
+      .setValueAndOriginalValue(value)
+      .setURI(lexer.getURI())
+      .setLine(line)
+      .setColumn(column)
+      .build();
+
+    lexer.addTrivia(Trivia.createComment(token));
+    sb.delete(0, sb.length());
+    return true;
+  }
+
+  public static int isComment(CodeReader code) {
+    int next = 0;
+
+    // start of single line comment?
+    if (code.charAt(next) != '/') {
+      return 0;
+    }
+
+    next += 1;
+    next += ChannelUtils.handleLineSplicing(code, next);
+
+    if (code.charAt(next) != '/') {
+      return 0;
+    }
+    next += 1;
+    return next;
+  }
+
+  public static boolean read(CodeReader code, StringBuilder sb) {
+    while (true) { // search end of line
+      var end = ChannelUtils.handleLineSplicing(code, 0);
+      code.skip(end); // remove line splicing
+
+      var charAt = code.charAt(0);
+      if (ChannelUtils.isNewLine(charAt) || charAt == ChannelUtils.EOF) {
+        break;
+      }
+      sb.append((char) code.pop());
+    }
+    return true;
+  }
+
+}
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/channels/StringLiteralsChannel.java b/cxx-squid/src/main/java/org/sonar/cxx/channels/StringLiteralsChannel.java
index 288ed1d652..135e0bbb47 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/channels/StringLiteralsChannel.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/channels/StringLiteralsChannel.java
@@ -30,8 +30,6 @@
  */
 public class StringLiteralsChannel extends Channel<Lexer> {
 
-  private static final char EOF = (char) -1;
-
   private final StringBuilder csb = new StringBuilder(256);
   private int index = 0;
   private char ch = ' ';
@@ -72,6 +70,14 @@ public boolean read(CodeReader code, StringBuilder sb) {
     }
     readUdSuffix(code);
     for (var i = 0; i < index; i++) {
+      if (code.charAt(0) == '\\') {
+        var len = ChannelUtils.handleLineSplicing(code, 0);
+        if (len > 1) {
+          code.skip(len); // remove line splicing
+          i += (len - 1);
+          continue;
+        }
+      }
       sb.append((char) code.pop());
     }
     return true;
@@ -102,7 +108,7 @@ private boolean readRawString(CodeReader code, StringBuilder sb) {
     char charAt;
     index++;
     while ((charAt = code.charAt(index)) != '(') { // delimiter in front of (
-      if (charAt == EOF) {
+      if (charAt == ChannelUtils.EOF) {
         return false;
       }
       sb.append(charAt);
@@ -114,14 +120,14 @@ private boolean readRawString(CodeReader code, StringBuilder sb) {
       index -= sb.length();
       sb.delete(0, sb.length());
       while ((charAt = code.charAt(index)) != ')') { // raw_character*
-        if (charAt == EOF) {
+        if (charAt == ChannelUtils.EOF) {
           return false;
         }
         index++;
       }
       index++;
       while ((charAt = code.charAt(index)) != '"') { // delimiter after )
-        if (charAt == EOF) {
+        if (charAt == ChannelUtils.EOF) {
           return false;
         }
         sb.append(charAt);
@@ -141,7 +147,7 @@ private boolean readString(CodeReader code) {
     index++;
     char charAt;
     while ((charAt = code.charAt(index)) != ch) {
-      if (charAt == EOF) {
+      if (charAt == ChannelUtils.EOF) {
         return false;
       }
       if (charAt == '\\') {
@@ -158,10 +164,10 @@ private void readUdSuffix(CodeReader code) {
     int len = 0;
     for (int start_index = index;; index++) {
       var charAt = code.charAt(index);
-      if (charAt == EOF) {
+      if (charAt == ChannelUtils.EOF) {
         return;
       }
-      if (isSuffix(charAt)) {
+      if (ChannelUtils.isSuffix(charAt)) {
         len++;
       } else if (Character.isDigit(charAt)) {
         if (len > 0) {
@@ -176,8 +182,4 @@ private void readUdSuffix(CodeReader code) {
     }
   }
 
-  private static boolean isSuffix(char c) {
-    return Character.isLowerCase(c) || Character.isUpperCase(c) || (c == '_');
-  }
-
 }
diff --git a/cxx-squid/src/main/java/org/sonar/cxx/parser/CxxLexerPool.java b/cxx-squid/src/main/java/org/sonar/cxx/parser/CxxLexerPool.java
index 9d553de977..5d1539c28b 100644
--- a/cxx-squid/src/main/java/org/sonar/cxx/parser/CxxLexerPool.java
+++ b/cxx-squid/src/main/java/org/sonar/cxx/parser/CxxLexerPool.java
@@ -25,9 +25,7 @@
 import com.sonar.cxx.sslr.impl.channel.BomCharacterChannel;
 import com.sonar.cxx.sslr.impl.channel.IdentifierAndKeywordChannel;
 import com.sonar.cxx.sslr.impl.channel.PunctuatorChannel;
-import static com.sonar.cxx.sslr.impl.channel.RegexpChannelBuilder.ANY_CHAR;
 import static com.sonar.cxx.sslr.impl.channel.RegexpChannelBuilder.and;
-import static com.sonar.cxx.sslr.impl.channel.RegexpChannelBuilder.commentRegexp;
 import static com.sonar.cxx.sslr.impl.channel.RegexpChannelBuilder.g;
 import static com.sonar.cxx.sslr.impl.channel.RegexpChannelBuilder.o2n;
 import static com.sonar.cxx.sslr.impl.channel.RegexpChannelBuilder.opt;
@@ -39,8 +37,10 @@
 import java.util.Set;
 import org.sonar.cxx.channels.BackslashChannel;
 import org.sonar.cxx.channels.CharacterLiteralsChannel;
+import org.sonar.cxx.channels.MultiLineCommentChannel;
 import org.sonar.cxx.channels.PreprocessorChannel;
 import org.sonar.cxx.channels.RightAngleBracketsChannel;
+import org.sonar.cxx.channels.SingleLineCommentChannel;
 import org.sonar.cxx.channels.StringLiteralsChannel;
 import org.sonar.cxx.preprocessor.PPSpecialIdentifier;
 
@@ -81,8 +81,8 @@ public static CxxLexerPool create(Charset charset, Preprocessor... preprocessors
       .withFailIfNoChannelToConsumeOneCharacter(true)
       .withChannel(new BlackHoleChannel("\\s++"))
       // C++ Standard, Section 2.8 "Comments"
-      .withChannel(commentRegexp("//[^\\n\\r]*+"))
-      .withChannel(commentRegexp("/\\*", ANY_CHAR + "*?", "\\*/"))
+      .withChannel(new SingleLineCommentChannel())
+      .withChannel(new MultiLineCommentChannel())
       // backslash at the end of the line: just throw away
       .withChannel(new BackslashChannel())
       // detects preprocessor directives:
diff --git a/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerTest.java b/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerTest.java
index abb2f585bb..a52fd9cdd0 100644
--- a/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerTest.java
+++ b/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerTest.java
@@ -23,7 +23,6 @@
 import com.sonar.cxx.sslr.api.Grammar;
 import com.sonar.cxx.sslr.impl.Lexer;
 import java.io.File;
-import java.net.URISyntaxException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import static org.assertj.core.api.Assertions.assertThat;
@@ -55,10 +54,77 @@ public void init() {
     lexer = CxxLexerPool.create(cxxpp, new JoinStringsPreprocessor()).getLexer();
   }
 
+  /**
+   * C++ Standard, line splicing
+   */
+  @Test
+  void line_splicing() {
+    var softly = new SoftAssertions();
+
+    softly.assertThat(lexer.lex(""
+    )).as("empty file").allSatisfy(token
+      -> assertThat(token).isValue("EOF").isLine(1));
+    softly.assertThat(lexer.lex("\\\n"
+    )).as("empty file with line splicing").allSatisfy(token
+      -> assertThat(token).isValue("EOF").isLine(2));
+    softly.assertThat(lexer.lex("\\   \t   \n"
+    )).as("empty file with line splicing and whitespaces").allSatisfy(token
+      -> assertThat(token).isValue("EOF").isLine(2));
+
+    softly.assertThat(lexer.lex("//a\\\n"
+                                  + "b\n")).as("comment c++: line splicing").anySatisfy(token
+      -> assertThat(token).hasTrivia().isTrivia("//ab").isComment().isTriviaLine(1));
+    softly.assertThat(lexer.lex("/\\\n"
+                                  + "/ab\n")).as("comment c++: line splicing").anySatisfy(token
+      -> assertThat(token).hasTrivia().isTrivia("//ab").isComment().isTriviaLine(1));
+    softly.assertThat(lexer.lex("/\\   \t   \n"
+                                  + "/ab\n")).as("comment c++: line splicing").anySatisfy(token
+      -> assertThat(token).hasTrivia().isTrivia("//ab").isComment().isTriviaLine(1));
+    softly.assertThat(lexer.lex("int main() {\n"
+                                  + "int i = 1\n"
+                                  + "// \\\n" // line splicing
+                                  + "+ 42\n"
+                                  + ";\n"
+                                  + "return i;\n"
+                                  + "}\n")).as("comment c++: line splicing").anySatisfy(token
+      -> assertThat(token).hasTrivia().isTrivia("// + 42").isComment().isTriviaLine(3));
+    softly.assertThat(lexer.lex("int main() {\n"
+                                  + "int i = 1\n"
+                                  + "// \\   \t   \n" // line splicing with whitespaces
+                                  + "+ 42\n"
+                                  + ";\n"
+                                  + "return i;\n"
+                                  + "}\n")).as("comment c++: line splicing with whitespaces").anySatisfy(token
+      -> assertThat(token).hasTrivia().isTrivia("// + 42").isComment().isTriviaLine(3));
+
+    softly.assertThat(lexer.lex("/\\\n" // line splicing
+                                  + "**\\\n" // line splicing
+                                  + "/")).as("comment c: line splicing").anySatisfy(token
+      -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("/**/").isComment().isTriviaLine(1));
+    softly.assertThat(lexer.lex("/\\   \t   \n" // line splicing with whitespaces
+                                  + "**\\   \t   \n" // line splicing with whitespaces
+                                  + "/")).as("comment c: line splicing with whitespaces").anySatisfy(token
+      -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("/**/").isComment().isTriviaLine(1));
+
+    softly.assertThat(lexer.lex("/\\\n"
+                                  + "*\n"
+                                  + "*/ # /*\n"
+                                  + "*/ defi\\\n"
+                                  + "ne FO\\\n"
+                                  + "O 10\\\n"
+                                  + "20\n")).as("preprocessor directive with line splicing").anySatisfy(token
+      -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("#  define FOO 1020").isTriviaLine(3));
+    softly.assertAll();
+
+    softly.assertThat(lexer.lex("\"str\\\n"
+                                  + "i\\\n"
+                                  + "ng\"")).as("string with line splicing").anySatisfy(token
+      -> assertThat(token).isValue("\"string\"").hasType(CxxTokenType.STRING).isLine(1));
+    softly.assertAll();
+  }
+
   /**
    * C++ Standard, Section 2.8 "Comments"
-   *
-   * @throws URISyntaxException
    */
   @Test
   void comments_cxx() {
@@ -85,7 +151,7 @@ void comments_c() {
     softly.assertThat(lexer.lex("/* My comment */")).as("comment c: simple").anySatisfy(token
       -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("/* My comment */").isComment().isTriviaLine(1));
     softly.assertThat(lexer.lex("/*\\\n*/")).as("comment c: with newline").anySatisfy(token
-      -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("/*\\\n*/").isComment().isTriviaLine(1));
+      -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("/**/").isComment().isTriviaLine(1));
     softly.assertThat(lexer.lex("/*//*/")).as("comment c: nested").anySatisfy(token
       -> assertThat(token).isValue("EOF").hasTrivia().isTrivia("/*//*/").isComment().isTriviaLine(1));
     softly.assertThat(lexer.lex("/* /* */")).as("comment c: nested2").anySatisfy(token
diff --git a/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerWithoutPreprocessorTest.java b/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerWithoutPreprocessorTest.java
index 0d74061753..6a9b829086 100644
--- a/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerWithoutPreprocessorTest.java
+++ b/cxx-squid/src/test/java/org/sonar/cxx/lexer/CxxLexerWithoutPreprocessorTest.java
@@ -66,7 +66,7 @@ void preprocessor_directives() {
   @Test
   void preprocessor_continued_define() {
     assertThat(lexer.lex("#define M\\\n"
-                           + "0")).anySatisfy(token -> assertThat(token).isValue("#define M 0").hasType(
+                           + "0")).anySatisfy(token -> assertThat(token).isValue("#define M0").hasType(
       CxxTokenType.PREPROCESSOR));
   }
 
diff --git a/cxx-squid/src/test/java/org/sonar/cxx/lexer/LexerAssert.java b/cxx-squid/src/test/java/org/sonar/cxx/lexer/LexerAssert.java
index 1ee4728f08..2eaec38a9f 100644
--- a/cxx-squid/src/test/java/org/sonar/cxx/lexer/LexerAssert.java
+++ b/cxx-squid/src/test/java/org/sonar/cxx/lexer/LexerAssert.java
@@ -51,6 +51,15 @@ public LexerAssert isValue(String value) {
     return this;
   }
 
+  public LexerAssert isLine(int line) {
+    isNotNull();
+    int tokenLine = actual.getLine();
+    if (tokenLine != line) {
+      failWithMessage("Expected the Token line to be <%s> but was <%s>", line, tokenLine);
+    }
+    return this;
+  }
+
   public LexerAssert hasTrivia() {
     isNotNull();
     boolean exists = actual.hasTrivia();
diff --git a/cxx-squid/src/test/java/org/sonar/cxx/preprocessor/IncludeFileLexerTest.java b/cxx-squid/src/test/java/org/sonar/cxx/preprocessor/IncludeFileLexerTest.java
index 56f9ffb7e4..3c3625d0a8 100644
--- a/cxx-squid/src/test/java/org/sonar/cxx/preprocessor/IncludeFileLexerTest.java
+++ b/cxx-squid/src/test/java/org/sonar/cxx/preprocessor/IncludeFileLexerTest.java
@@ -44,8 +44,10 @@ void proper_preprocessor_directives_are_created() {
 
   @Test
   void continued_lines_are_handled_correctly() {
-    List<Token> tokens = LEXER.lex("#define\\\nname");
-    assertThat(hasToken("#define name", CxxTokenType.PREPROCESSOR)
+    List<Token> tokens = LEXER.lex("#define \\\n"
+                                     + "name \\\n"
+                                     + "10");
+    assertThat(hasToken("#define name 10", CxxTokenType.PREPROCESSOR)
       .matches(tokens)).isTrue();
     assertThat(tokens).hasSize(2);
   }
diff --git a/cxx-squid/src/test/resources/metrics/nosonar.cc b/cxx-squid/src/test/resources/metrics/nosonar.cc
index 83538969b8..22c25f1c11 100644
--- a/cxx-squid/src/test/resources/metrics/nosonar.cc
+++ b/cxx-squid/src/test/resources/metrics/nosonar.cc
@@ -10,4 +10,4 @@ int c; /* NOSONAR */
 
 int d; // NOSONAR
 
-/* EOF '/
+/* EOF */
diff --git a/cxx-sslr/sslr-core/src/main/java/org/sonar/cxx/sslr/channel/CodeBuffer.java b/cxx-sslr/sslr-core/src/main/java/org/sonar/cxx/sslr/channel/CodeBuffer.java
index 94fb56f1f2..c6cf461906 100644
--- a/cxx-sslr/sslr-core/src/main/java/org/sonar/cxx/sslr/channel/CodeBuffer.java
+++ b/cxx-sslr/sslr-core/src/main/java/org/sonar/cxx/sslr/channel/CodeBuffer.java
@@ -113,6 +113,20 @@ public final int pop() {
     return character;
   }
 
+  /**
+   * Read and consume the next characters
+   *
+   * @param number number of characters to consume
+   * @return the next character or -1 if the end of the stream is reached
+   */
+  public final int skip(int number) {
+    while (number != 0) {
+      pop();
+      number--;
+    }
+    return peek();
+  }
+
   private void updateCursorPosition(int character) {
     // see Java Language Specification : http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.4
     if (character == LF || character == CR && peek() != LF) {
diff --git a/cxx-sslr/sslr-core/src/test/java/org/sonar/cxx/sslr/channel/CodeBufferTest.java b/cxx-sslr/sslr-core/src/test/java/org/sonar/cxx/sslr/channel/CodeBufferTest.java
index c2c3c2a06c..d0f1e2268d 100644
--- a/cxx-sslr/sslr-core/src/test/java/org/sonar/cxx/sslr/channel/CodeBufferTest.java
+++ b/cxx-sslr/sslr-core/src/test/java/org/sonar/cxx/sslr/channel/CodeBufferTest.java
@@ -41,6 +41,13 @@ void testPop() {
     assertThat(code.pop()).isEqualTo(-1);
   }
 
+  @Test
+  void testSkip() {
+    var code = new CodeBuffer("1234", defaulConfiguration);
+    assertThat((char) code.skip(2)).isEqualTo('3');
+    assertThat(code.skip(2)).isEqualTo(-1);
+  }
+
   @Test
   void testPeek() {
     var code = new CodeBuffer("pa", defaulConfiguration);