lib: use const to define constants

This commit replaces a number of var statements throughout
the lib code with const statements.

PR-URL: https://github.com/iojs/io.js/pull/541
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

1 files changed, 50 insertions, 50 deletions

diff --git a/lib/url.js b/lib/url.js
index abe66acfca..50126ae9bf 100644
--- a/lib/url.js
+++ b/lib/url.js
@@ -1,7 +1,7 @@
 'use strict';
 
-var punycode = require('punycode');
-var util = require('util');
+const punycode = require('punycode');
+const util = require('util');
 
 exports.parse = urlParse;
 exports.resolve = urlResolve;
@@ -29,54 +29,54 @@ function Url() {
 
 // define these here so at least they only have to be
 // compiled once on the first module load.
-var protocolPattern = /^([a-z0-9.+-]+:)/i,
-    portPattern = /:[0-9]*$/,
-
-    // Special case for a simple path URL
-    simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
-
-    // RFC 2396: characters reserved for delimiting URLs.
-    // We actually just auto-escape these.
-    delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
-
-    // RFC 2396: characters not allowed for various reasons.
-    unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),
-
-    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
-    autoEscape = ['\''].concat(unwise),
-    // Characters that are never ever allowed in a hostname.
-    // Note that any invalid chars are also handled, but these
-    // are the ones that are *expected* to be seen, so we fast-path
-    // them.
-    nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
-    hostEndingChars = ['/', '?', '#'],
-    hostnameMaxLen = 255,
-    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
-    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
-    // protocols that can allow "unsafe" and "unwise" chars.
-    unsafeProtocol = {
-      'javascript': true,
-      'javascript:': true
-    },
-    // protocols that never have a hostname.
-    hostlessProtocol = {
-      'javascript': true,
-      'javascript:': true
-    },
-    // protocols that always contain a // bit.
-    slashedProtocol = {
-      'http': true,
-      'https': true,
-      'ftp': true,
-      'gopher': true,
-      'file': true,
-      'http:': true,
-      'https:': true,
-      'ftp:': true,
-      'gopher:': true,
-      'file:': true
-    },
-    querystring = require('querystring');
+const protocolPattern = /^([a-z0-9.+-]+:)/i;
+const portPattern = /:[0-9]*$/;
+
+// Special case for a simple path URL
+const simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/;
+
+// RFC 2396: characters reserved for delimiting URLs.
+// We actually just auto-escape these.
+const delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'];
+
+// RFC 2396: characters not allowed for various reasons.
+const unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims);
+
+// Allowed by RFCs, but cause of XSS attacks.  Always escape these.
+const autoEscape = ['\''].concat(unwise);
+
+// Characters that are never ever allowed in a hostname.
+// Note that any invalid chars are also handled, but these
+// are the ones that are *expected* to be seen, so we fast-path them.
+const nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape);
+const hostEndingChars = ['/', '?', '#'];
+const hostnameMaxLen = 255;
+const hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/;
+const hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/;
+// protocols that can allow "unsafe" and "unwise" chars.
+const unsafeProtocol = {
+  'javascript': true,
+  'javascript:': true
+};
+// protocols that never have a hostname.
+const hostlessProtocol = {
+  'javascript': true,
+  'javascript:': true
+};
+// protocols that always contain a // bit.
+const slashedProtocol = {
+  'http': true,
+  'https': true,
+  'ftp': true,
+  'gopher': true,
+  'file': true,
+  'http:': true,
+  'https:': true,
+  'ftp:': true,
+  'gopher:': true,
+  'file:': true
+};
+const querystring = require('querystring');
 
 function urlParse(url, parseQueryString, slashesDenoteHost) {
   if (url && util.isObject(url) && url instanceof Url) return url;