1 files changed, 30 insertions, 0 deletions
diff --git a/src/main/scala/scalam/m/ast/expressions.scala b/src/main/scala/scalam/m/ast/expressions.scala
new file mode 100644
index 0000000..db99ae6
--- /dev/null
+++ b/src/main/scala/scalam/m/ast/expressions.scala
@@ -0,0 +1,30 @@
+package scalam.m.ast
+
+trait Expression extends Mable with Root{
+  def m: String = this match {
+    case IntLiteral(x) => x.toString
+    case DoubleLiteral(x) => x.toString
+    case StringLiteral(x) => "'" + x + "'"
+    case SliceLiteral => ":"
+    case ArrayLiteral(elements @ _*) => elements.map(_.m).mkString("[", ",", "]")
+    case MatrixLiteral(rows @ _*) => rows.map(_.m).mkString("[", ";", "]")
+
+    case Variable(id) => id.m
+    case IndexMatrix(id, indices @ _*) => id.m + indices.map(_.m).mkString("(", ",", ")")
+    case IndexStructure(id, indices @ _*) => id.m + indices.map(_.m).mkString("{", ",", "}")
+    case Function(id, params @ _*) => id.m + params.map(_.m).mkString("(", ",", ")")
+
+    case _ => throw new IllegalArgumentException("unkown expression: " + this)
+  }
+}
+
+case class IntLiteral(x: Int) extends Expression
+case class DoubleLiteral(x: Double) extends Expression
+case class StringLiteral(x: String) extends Expression
+case object SliceLiteral extends Expression
+case class ArrayLiteral(elements: Expression*) extends Expression
+case class MatrixLiteral(rows: Expression*) extends Expression
+case class Variable(id: Identifier) extends Expression
+case class IndexMatrix(id: Identifier, indices: Expression*) extends Expression
+case class IndexStructure(id: Identifier, indices: Expression*) extends Expression
+case class Function(function: Identifier, params: Expression*) extends Expression
+\ No newline at end of file