doInterpolatedStringLiteral: handle empty string special case

kaitai-io · Mar 2, 2024 · c848416 · c848416
1 parent e8ee268
commit c848416
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Showing 3 changed files with 15 additions and 3 deletions.
diff --git a/shared/src/main/scala/io/kaitai/struct/translators/BaseTranslator.scala b/shared/src/main/scala/io/kaitai/struct/translators/BaseTranslator.scala
@@ -209,7 +209,11 @@ abstract class BaseTranslator(val provider: TypeProvider)
 
   // f-strings
   def doInterpolatedStringLiteral(exprs: Seq[Ast.expr]): String =
-    exprs.map(anyToStr).mkString(" + ")
+    if (exprs.isEmpty) {
+      doStringLiteral("")
+    } else {
+      exprs.map(anyToStr).mkString(" + ")
+    }
 
   def anyToStr(value: Ast.expr): String = {
     detectType(value) match {

diff --git a/shared/src/main/scala/io/kaitai/struct/translators/PHPTranslator.scala b/shared/src/main/scala/io/kaitai/struct/translators/PHPTranslator.scala
@@ -147,7 +147,11 @@ class PHPTranslator(provider: TypeProvider, config: RuntimeConfig) extends BaseT
     s"max(${translate(a)})"
 
   override def doInterpolatedStringLiteral(exprs: Seq[Ast.expr]): String =
-    exprs.map(anyToStr).mkString(" . ")
+    if (exprs.isEmpty) {
+      doStringLiteral("")
+    } else {
+      exprs.map(anyToStr).mkString(" . ")
+    }
 
   val namespaceRef = if (config.phpNamespace.isEmpty) {
     ""

diff --git a/shared/src/main/scala/io/kaitai/struct/translators/PerlTranslator.scala b/shared/src/main/scala/io/kaitai/struct/translators/PerlTranslator.scala
@@ -205,5 +205,9 @@ class PerlTranslator(provider: TypeProvider, importList: ImportList) extends Bas
     s"${translate(value)}->size()"
 
   override def doInterpolatedStringLiteral(exprs: Seq[Ast.expr]): String =
-    exprs.map(anyToStr).mkString(" . ")
+    if (exprs.isEmpty) {
+      doStringLiteral("")
+    } else {
+      exprs.map(anyToStr).mkString(" . ")
+    }
 }