Add support for emitting float literals

trans/transpiler/phases/emit_cpp/expr.py

@@ -68,6 +68,8 @@ class ExpressionVisitor(NodeVisitor):
         elif isinstance(node.value, int):
             # TODO: bigints
             yield str(node.value)
+        elif isinstance(node.value, float):
+            yield repr(node.value)
         elif isinstance(node.value, complex):
             yield f"PyComplex({node.value.real}, {node.value.imag})"
         elif node.value is None: