diff --git a/chapi-domain/src/main/kotlin/chapi/domain/expr/Expression.kt b/chapi-domain/src/main/kotlin/chapi/domain/expr/Expression.kt
index cb6bd20d..468a92b4 100644
--- a/chapi-domain/src/main/kotlin/chapi/domain/expr/Expression.kt
+++ b/chapi-domain/src/main/kotlin/chapi/domain/expr/Expression.kt
@@ -2,13 +2,6 @@ package chapi.domain.expr
 
 // todo: mapping to pratt parser ?
 // mini sample <https://github.com/segeljakt/pratt>
-//
-// enum class TokenTree {
-//     Primary,
-//     Prefix,
-//     Infix,
-//     Postfix;
-// }
 sealed class Expression {
     class BinOp(val lhs: ExpressionNode, val op: BinOpKind, val rhs: ExpressionNode) : ExpressionNode {
         override fun toString() = "$lhs $op $rhs"
@@ -22,10 +15,26 @@ sealed class Expression {
         override fun toString() = value.toString()
     }
 
+    class FloatValue(val value: Float) : ExpressionNode {
+        override fun toString() = value.toString()
+    }
+
+    class StringValue(val value: String) : ExpressionNode {
+        override fun toString() = value
+    }
+
     class Variable(val name: String) : ExpressionNode {
         override fun toString() = name
     }
 
+    class TryCatch(val tryBlock: ExpressionNode, val catchBlock: ExpressionNode) : ExpressionNode {
+        override fun toString() = "try { $tryBlock } catch { $catchBlock }"
+    }
+
+    class IfElse(val condition: ExpressionNode, val thenBlock: ExpressionNode, val elseBlock: ExpressionNode) : ExpressionNode {
+        override fun toString() = "if ($condition) { $thenBlock } else { $elseBlock }"
+    }
+
     class Identifier(val name: String) : ExpressionNode {
         override fun toString() = name
     }
@@ -45,6 +54,10 @@ sealed class Expression {
         override fun toString() = args.joinToString(", ")
     }
 
+    class ArrayLiteral(val args: kotlin.Array<ExpressionNode>) : ExpressionNode {
+        override fun toString() = "[${args.joinToString(", ")}]"
+    }
+
     class CustomValueType(val value: ValueType) : ExpressionNode
 
 }
diff --git a/chapi-domain/src/test/kotlin/chapi/domain/expr/ExpressionTest.kt b/chapi-domain/src/test/kotlin/chapi/domain/expr/ExpressionTest.kt
index 2e6d6d96..79478226 100644
--- a/chapi-domain/src/test/kotlin/chapi/domain/expr/ExpressionTest.kt
+++ b/chapi-domain/src/test/kotlin/chapi/domain/expr/ExpressionTest.kt
@@ -70,4 +70,34 @@ class ExpressionTest {
             ).toString(), "add(1, 2)"
         )
     }
+
+    @Test
+    fun arrayLiteral() {
+        assertEquals(Expression.ArrayLiteral(
+                args = arrayOf(
+                    Expression.IntValue(1),
+                    Expression.IntValue(2)
+                )
+            ).toString(), "[1, 2]"
+        )
+    }
+
+    @Test
+    fun tryCatch() {
+        assertEquals(Expression.TryCatch(
+                tryBlock = Expression.IntValue(1),
+                catchBlock = Expression.IntValue(2)
+            ).toString(), "try { 1 } catch { 2 }"
+        )
+    }
+
+    @Test
+    fun ifElse() {
+        assertEquals(Expression.IfElse(
+                condition = Expression.IntValue(1),
+                thenBlock = Expression.IntValue(2),
+                elseBlock = Expression.IntValue(3)
+            ).toString(), "if (1) { 2 } else { 3 }"
+        )
+    }
 }