Added Sieve parser code in master

dev/Sieve/Extensions/rfc5429.js

@@ -0,0 +1,81 @@
+/**
+ * https://tools.ietf.org/html/rfc5429
+ */
+
+import {
+	GrammarCommand,
+	GrammarQuotedString,
+	GrammarString
+} from 'Sieve/Grammar';
+
+/**
+ * https://tools.ietf.org/html/rfc5429#section-2.1
+ */
+export class ErejectCommand extends GrammarCommand
+{
+	constructor()
+	{
+		super();
+		this._reason = new GrammarQuotedString;
+	}
+
+	get require() { return 'ereject'; }
+
+	toString()
+	{
+		return 'ereject ' + this._reason + ';';
+	}
+
+	get reason()
+	{
+		return this._reason.value;
+	}
+
+	set reason(value)
+	{
+		this._reason.value = value;
+	}
+
+	pushArguments(args)
+	{
+		if (args[0] instanceof GrammarString) {
+			this._reason = args[0];
+		}
+	}
+}
+
+/**
+ * https://tools.ietf.org/html/rfc5429#section-2.2
+ */
+export class RejectCommand extends GrammarCommand
+{
+	constructor()
+	{
+		super();
+		this._reason = new GrammarQuotedString;
+	}
+
+	get require() { return 'reject'; }
+
+	toString()
+	{
+		return 'reject ' + this._reason + ';';
+	}
+
+	get reason()
+	{
+		return this._reason.value;
+	}
+
+	set reason(value)
+	{
+		this._reason.value = value;
+	}
+
+	pushArguments(args)
+	{
+		if (args[0] instanceof GrammarString) {
+			this._reason = args[0];
+		}
+	}
+}