1 files changed, 44 insertions, 0 deletions
diff --git a/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java b/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java
new file mode 100644
index 0000000..29a33eb
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/ast/identifiers/Identifier.java
@@ -0,0 +1,44 @@
+package org.zwobble.couscous.ast.identifiers;
+
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+public class Identifier {
+    public static final Identifier TOP = new Identifier(ImmutableList.of());
+
+    private final List<String> parts;
+
+    private Identifier(List<String> parts) {
+        this.parts = parts;
+    }
+
+    public Identifier extend(String name) {
+        ImmutableList.Builder<String> parts = ImmutableList.builder();
+        parts.addAll(this.parts);
+        parts.add(name);
+        return new Identifier(parts.build());
+    }
+
+    @Override
+    public String toString() {
+        return "Identifier(" +
+            "parts=" + parts +
+            ')';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Identifier that = (Identifier) o;
+
+        return parts.equals(that.parts);
+    }
+
+    @Override
+    public int hashCode() {
+        return parts.hashCode();
+    }
+}