From cea82209e5aa312f4a513308c148d3e944004cb4 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Thu, 17 Mar 2016 22:33:15 +0000
Subject: Improve support for generics

---
 .../backends/python/PythonCodeGenerator.java       |  5 +++--
 .../couscous/backends/python/PythonSerializer.java | 10 ++++++++-
 .../ast/visitors/PythonExpressionStatement.java    | 25 ++++++++++++++++++++++
 .../python/ast/visitors/PythonNodeVisitor.java     |  4 ++--
 4 files changed, 39 insertions(+), 5 deletions(-)
 create mode 100644 src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonExpressionStatement.java

(limited to 'src/main/java/org/zwobble/couscous/backends/python')

diff --git a/src/main/java/org/zwobble/couscous/backends/python/PythonCodeGenerator.java b/src/main/java/org/zwobble/couscous/backends/python/PythonCodeGenerator.java
index 49e7b80..fc3aa98 100644
--- a/src/main/java/org/zwobble/couscous/backends/python/PythonCodeGenerator.java
+++ b/src/main/java/org/zwobble/couscous/backends/python/PythonCodeGenerator.java
@@ -39,6 +39,7 @@ import static org.zwobble.couscous.backends.python.ast.PythonReturnNode.pythonRe
 import static org.zwobble.couscous.backends.python.ast.PythonStringLiteralNode.pythonStringLiteral;
 import static org.zwobble.couscous.backends.python.ast.PythonVariableReferenceNode.pythonVariableReference;
 import static org.zwobble.couscous.backends.python.ast.PythonWhileNode.pythonWhile;
+import static org.zwobble.couscous.backends.python.ast.visitors.PythonExpressionStatement.pythonExpressionStatement;
 import static org.zwobble.couscous.util.Casts.tryCast;
 import static org.zwobble.couscous.util.ExtraLists.list;
 
@@ -195,10 +196,10 @@ public class PythonCodeGenerator {
         @Override
         public PythonStatementNode visit(ExpressionStatementNode expressionStatement) {
             if (expressionStatement.getExpression() instanceof AssignmentNode) {
-                final org.zwobble.couscous.ast.AssignmentNode assignment = (AssignmentNode)expressionStatement.getExpression();
+                AssignmentNode assignment = (AssignmentNode)expressionStatement.getExpression();
                 return pythonAssignment(assignment.getTarget().accept(EXPRESSION_GENERATOR), generateExpression(assignment.getValue()));
             } else {
-                throw new UnsupportedOperationException();
+                return pythonExpressionStatement(generateExpression(expressionStatement.getExpression()));
             }
         }
 
diff --git a/src/main/java/org/zwobble/couscous/backends/python/PythonSerializer.java b/src/main/java/org/zwobble/couscous/backends/python/PythonSerializer.java
index d3771d3..7732a87 100644
--- a/src/main/java/org/zwobble/couscous/backends/python/PythonSerializer.java
+++ b/src/main/java/org/zwobble/couscous/backends/python/PythonSerializer.java
@@ -2,6 +2,7 @@ package org.zwobble.couscous.backends.python;
 
 import org.zwobble.couscous.backends.SourceCodeWriter;
 import org.zwobble.couscous.backends.python.ast.*;
+import org.zwobble.couscous.backends.python.ast.visitors.PythonExpressionStatement;
 import org.zwobble.couscous.backends.python.ast.visitors.PythonNodeVisitor;
 
 public class PythonSerializer implements PythonNodeVisitor {
@@ -101,7 +102,14 @@ public class PythonSerializer implements PythonNodeVisitor {
         writer.writeSpace();
         writeParenthesised(operation.getRight(), operation);
     }
-    
+
+    @Override
+    public void visit(PythonExpressionStatement statement) {
+        writer.writeStatement(() -> {
+            write(statement.getExpression());
+        });
+    }
+
     @Override
     public void visit(PythonReturnNode pythonReturn) {
         writer.writeStatement(() -> {
diff --git a/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonExpressionStatement.java b/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonExpressionStatement.java
new file mode 100644
index 0000000..0ba1c38
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonExpressionStatement.java
@@ -0,0 +1,25 @@
+package org.zwobble.couscous.backends.python.ast.visitors;
+
+import org.zwobble.couscous.backends.python.ast.PythonExpressionNode;
+import org.zwobble.couscous.backends.python.ast.PythonStatementNode;
+
+public class PythonExpressionStatement implements PythonStatementNode {
+    public static PythonExpressionStatement pythonExpressionStatement(PythonExpressionNode expression) {
+        return new PythonExpressionStatement(expression);
+    }
+
+    private final PythonExpressionNode expression;
+
+    public PythonExpressionStatement(PythonExpressionNode expression) {
+        this.expression = expression;
+    }
+
+    public PythonExpressionNode getExpression() {
+        return expression;
+    }
+
+    @Override
+    public void accept(PythonNodeVisitor visitor) {
+        visitor.visit(this);
+    }
+}
diff --git a/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonNodeVisitor.java b/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonNodeVisitor.java
index 8f04787..d43691d 100644
--- a/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonNodeVisitor.java
+++ b/src/main/java/org/zwobble/couscous/backends/python/ast/visitors/PythonNodeVisitor.java
@@ -13,7 +13,8 @@ public interface PythonNodeVisitor {
     void visit(PythonGetSliceNode getSlice);
     void visit(PythonNotNode notOperation);
     void visit(PythonBinaryOperation operation);
-    
+
+    void visit(PythonExpressionStatement statement);
     void visit(PythonReturnNode pythonReturn);
     void visit(PythonPassNode pass);
     void visit(PythonClassNode pythonClass);
@@ -24,5 +25,4 @@ public interface PythonNodeVisitor {
     void visit(PythonWhileNode whileLoop);
 
     void visit(PythonModuleNode module);
-
 }
-- 
cgit v1.2.3