[jOOQ/jOOQ#17099] [jOOQ/jOOQ#17117] Code generation escaping issues

This includes:

- [jOOQ/jOOQ#17099] KotlinGenerator contains incomplete list of Kotlin forbidden identifier characters
- [jOOQ/jOOQ#17117] Bad code generated for enum values containing backslash character

jOOQ-codegen/src/main/java/org/jooq/codegen/GenerationUtil.java

@@ -358,19 +358,31 @@ class GenerationUtil {
      * Check if a character can be used in a kotlin identifier.
      * <p>
      * See <a href=
-     * "https://kotlinlang.org/spec/syntax-and-grammar.html#grammar-rule-QuotedSymbol">https://kotlinlang.org/spec/syntax-and-grammar.html#grammar-rule-QuotedSymbol</a>
+     * "https://kotlinlang.org/docs/reference/grammar.html#Identifier">https://kotlinlang.org/docs/reference/grammar.html#Identifier</a>
      */
     private static boolean isKotlinIdentifierPart(char c) {
-        return c != '\r'
-            && c != '\n'
-            && c != '`'
-            && c != '('
-            && c != ')'
-            && c != '{'
-            && c != '}'
-            && c != '['
-            && c != ']'
-            && c != '.';
+        switch (c) {
+            case '\r':
+            case '\n':
+            case '`':
+            case '.':
+            case ';':
+            case ':':
+            case '\\':
+            case '/':
+            case '[':
+            case ']':
+            // [#17099] These used to be listed, but aren't actually forbidden:
+            // case '(':
+            // case ')':
+            // case '{':
+            // case '}':
+            case '<':
+            case '>':
+                return false;
+            default:
+                return true;
+        }
     }
 
     /**

jOOQ-codegen/src/main/java/org/jooq/codegen/JavaGenerator.java

@@ -4158,7 +4158,7 @@ public class JavaGenerator extends AbstractGenerator {
 
             out.println("def valueOf(s: %s): %s = s match {", String.class, className);
             for (int i = 0; i < identifiers.size(); i++) {
-                out.println("case \"%s\" => %s", literals.get(i), identifiers.get(i));
+                out.println("case \"%s\" => %s", escapeString(literals.get(i)), identifiers.get(i));
             }
             out.println("case _ => throw new %s()", IllegalArgumentException.class);
             out.println("}");
@@ -4199,7 +4199,7 @@ public class JavaGenerator extends AbstractGenerator {
             out.println("%senum class %s(@get:JvmName(\"literal\") public val literal: String)[[before= : ][%s]] {", visibility(), className, interfaces);
 
             for (int i = 0; i < literals.size(); i++)
-                out.println("%s(\"%s\")%s", identifiers.get(i), literals.get(i), (i == literals.size() - 1) ? ";" : ",");
+                out.println("%s(\"%s\")%s", identifiers.get(i), escapeString(literals.get(i)), (i == literals.size() - 1) ? ";" : ",");
 
             out.println("%soverride fun getCatalog(): %s? = %s",
                 visibilityPublic(), Catalog.class, noCatalog ? "null" : "schema.catalog");
@@ -4222,7 +4222,7 @@ public class JavaGenerator extends AbstractGenerator {
 
             for (int i = 0; i < literals.size(); i++) {
                 out.println();
-                out.println("%s(\"%s\")%s", identifiers.get(i), literals.get(i), (i == literals.size() - 1) ? ";" : ",");
+                out.println("%s(\"%s\")%s", identifiers.get(i), escapeString(literals.get(i)), (i == literals.size() - 1) ? ";" : ",");
             }
 
             out.println();

jOOQ/src/main/java/org/jooq/impl/InsertQueryImpl.java

@@ -1176,7 +1176,7 @@ implements
             Condition and = null;
 
             for (Field<?> field : fields) {
-                Field<Object> f = (Field<Object>) field;
+                Field<Object> f = (Field<Object>) orElse(table().field(field), () -> field);
                 Condition other = matchByConflictingKey(ctx, f, s.field(f));
                 and = (and == null) ? other : and.and(other);
             }