1 files changed, 90 insertions, 0 deletions
diff --git a/src/ast/nodes/ExprNode.java b/src/ast/nodes/ExprNode.java
new file mode 100644
index 0000000..3aa112f
--- /dev/null
+++ b/src/ast/nodes/ExprNode.java
@@ -0,0 +1,90 @@
+package com.clp.project.ast.nodes;
+
+import java.util.ArrayList;
+
+import com.clp.project.semanticanalysis.SemanticError;
+import com.clp.project.semanticanalysis.SymbolTable;
+import com.clp.project.ast.types.*;
+
+/**
+ * Node for the `expr` statement of the grammar.
+ */
+public class ExprNode implements Node {
+    private Node atom;
+    private Node compOp;
+    private String op;
+    private ArrayList<Node> exprs;
+    private ArrayList<Node> trailers;
+
+    public ExprNode(Node atom, Node compOp, ArrayList<Node> exprs, String op, ArrayList<Node> trailers) {
+        this.atom = atom;
+        this.compOp = compOp;
+        this.exprs = exprs;
+        this.op = op;
+        this.trailers = trailers;
+    }
+
+    @Override
+    public ArrayList<SemanticError> checkSemantics(SymbolTable ST, int _nesting) {
+        ArrayList<SemanticError> errors = new ArrayList<SemanticError>();
+
+        if (atom != null) {
+            errors.addAll(atom.checkSemantics(ST, _nesting));
+        }
+
+        if (compOp != null) {
+            errors.addAll(compOp.checkSemantics(ST, _nesting));
+        }
+
+        for (var expr : exprs) {
+            errors.addAll(expr.checkSemantics(ST, _nesting));
+        }
+
+        for (var trailer : trailers) {
+            errors.addAll(trailer.checkSemantics(ST, _nesting));
+        }
+
+        return errors;
+    }
+
+    // FIXME: type for the expr
+    @Override
+    public Type typeCheck() {
+        return new VoidType();
+    }
+
+    // TODO: add code generation for expr
+    @Override
+    public String codeGeneration() {
+        return "";
+    }
+
+    @Override
+    public String toPrint(String prefix) {
+        String str = prefix + "Expr\n";
+
+        prefix += "  ";
+        if (atom != null) {
+            str += atom.toPrint(prefix);
+        }
+
+        if (compOp != null) {
+            str += compOp.toPrint(prefix);
+        }
+
+        for (var expr : exprs) {
+            str += expr.toPrint(prefix);
+        }
+
+        for (var trailer : trailers) {
+            str += trailer.toPrint(prefix);
+        }
+
+        if (op != null) {
+            str += prefix + "Op(" + op + ")\n";
+        }
+
+        return str;
+    }
+
+}