ircd::js: Add function_literal convenience.

include/ircd/js/function_literal.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2016 Charybdis Development Team
+ * Copyright (C) 2016 Jason Volk <jason@zemos.net>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+#define HAVE_IRCD_JS_FUNCTION_LITERAL_H
+
+namespace ircd {
+namespace js   {
+
+class function_literal
+:public JS::PersistentRooted<JSFunction *>
+{
+	const char *name;
+	const char *text;
+	std::vector<const char *> prototype;
+
+  public:
+	function_literal(const char *const &name,
+	                 const std::initializer_list<const char *> &prototype,
+	                 const char *const &text);
+
+	function_literal(function_literal &&) noexcept;
+	function_literal(const function_literal &) = delete;
+};
+
+inline function_literal
+operator ""_function(const char *const text, const size_t len)
+{
+	return { "<literal>", {}, text };
+}
+
+} // namespace js
+} // namespace ircd

include/ircd/js/js.h

@@ -66,6 +66,7 @@ inline JSVersion version(const char *const &v)   { return JS_StringToVersion(v);
 #include "object.h"
 #include "script.h"
 #include "function.h"
+#include "function_literal.h"
 #include "vector.h"
 #include "priv.h"
 #include "get.h"

ircd/js.cc

@@ -636,6 +636,48 @@ const
 	return ret;
 }
 
+///////////////////////////////////////////////////////////////////////////////
+//
+// ircd/js/function_literal.h
+//
+
+ircd::js::function_literal::function_literal(const char *const &name,
+                                             const std::initializer_list<const char *> &prototype,
+                                             const char *const &text)
+:JS::PersistentRooted<JSFunction *>{*cx}
+,name{name}
+,text{text}
+,prototype{prototype}
+{
+	JS::CompileOptions opts{*cx};
+	JS::AutoObjectVector stack{*cx};
+	if(!JS::CompileFunction(*cx,
+	                        stack,
+	                        opts,
+	                        name,
+	                        this->prototype.size(),
+	                        &this->prototype.front(),
+	                        text,
+	                        strlen(text),
+	                        &(*this)))
+	{
+		throw syntax_error("Failed to compile function literal");
+	}
+}
+
+ircd::js::function_literal::function_literal(function_literal &&other)
+noexcept
+:JS::PersistentRooted<JSFunction *>
+{
+	*cx,
+	other
+}
+,name{std::move(other.name)}
+,text{std::move(other.text)}
+,prototype{std::move(other.prototype)}
+{
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 // ircd/js/function.h