Index: src/AST/Attribute.cpp
===================================================================
--- src/AST/Attribute.cpp	(revision 18d4dbdf64c0caa3e9d333291ba42e6a9327eda7)
+++ src/AST/Attribute.cpp	(revision 18d4dbdf64c0caa3e9d333291ba42e6a9327eda7)
@@ -0,0 +1,53 @@
+//
+// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
+//
+// The contents of this file are covered under the licence agreement in the
+// file "LICENCE" distributed with Cforall.
+//
+// Attribute.cpp --
+//
+// Author           : Aaron B. Moss
+// Created On       : Fri May 10 10:30:00 2019
+// Last Modified By : Aaron B. Moss
+// Created On       : Fri May 10 10:30:00 2019
+// Update Count     : 1
+//
+
+#include "Attribute.hpp"
+
+#include <algorithm> // for transform
+#include <cctype>    // for tolower
+#include <iterator>  // for back_inserter
+#include <string>
+
+namespace ast {
+
+std::string Attribute::normalizedName() const {
+	// trim underscores
+	auto begin = name.find_first_not_of('_');
+	auto end = name.find_last_not_of('_');
+	if ( begin == std::string::npos || end == std::string::npos ) return "";
+	
+	// convert to lowercase
+	std::string ret;
+	ret.reserve( end-begin+1 );
+	int (*tolower)(int) = std::tolower;
+	std::transform( &name[begin], &name[end+1], back_inserter( ret ), tolower );
+	return ret;
+}
+
+bool Attribute::isValidOnFuncParam() const {
+	// attributes such as aligned, cleanup, etc. produce GCC errors when they appear
+	// on function parameters. Maintain here a whitelist of attribute names that are
+	// allowed to appear on parameters.
+	std::string norm = normalizedName();
+	return norm == "unused" || norm == "noreturn";
+}
+
+}
+
+// Local Variables: //
+// tab-width: 4 //
+// mode: c++ //
+// compile-command: "make install" //
+// End: //
Index: src/AST/Attribute.hpp
===================================================================
--- src/AST/Attribute.hpp	(revision 18d4dbdf64c0caa3e9d333291ba42e6a9327eda7)
+++ src/AST/Attribute.hpp	(revision 18d4dbdf64c0caa3e9d333291ba42e6a9327eda7)
@@ -0,0 +1,55 @@
+//
+// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
+//
+// The contents of this file are covered under the licence agreement in the
+// file "LICENCE" distributed with Cforall.
+//
+// Attribute.hpp --
+//
+// Author           : Aaron B. Moss
+// Created On       : Fri May 10 10:30:00 2019
+// Last Modified By : Aaron B. Moss
+// Created On       : Fri May 10 10:30:00 2019
+// Update Count     : 1
+//
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "Node.hpp"     // for ptr
+#include "Visitor.hpp"
+
+namespace ast {
+
+class Expr;
+
+class Attribute final : public Node {
+public:
+	std::string name;
+	std::vector<ptr<Expr>> parameters;
+
+	Attribute( const std::string& name = "", std::vector<ptr<Expr>>&& params = {})
+	: name( name ), parameters( params ) {}
+
+	bool empty() const { return name.empty(); }
+
+	/// strip leading/trailing underscores and lowercase
+	std::string normalizedName() const;
+
+	/// true iff this attribute is allowed to appear attached to a function parameter
+	bool isValidOnFuncParam() const;
+
+	Attribute* accept( Visitor& v ) override { return v.visit( this ); }
+private:
+	Attribute* clone() const override { return new Attribute{ *this }; }
+};
+
+}
+
+// Local Variables: //
+// tab-width: 4 //
+// mode: c++ //
+// compile-command: "make install" //
+// End: //