Further reducing amount of redundant parentheses.

lib/coffee-script.js

@@ -1,6 +1,6 @@
 (function() {
   var Lexer, compile, helpers, lexer, parser, path, processScripts;
-  if ((typeof process !== "undefined" && process !== null)) {
+  if (typeof process !== "undefined" && process !== null) {
     path = require('path');
     Lexer = require('./lexer').Lexer;
     parser = require('./parser').parser;

lib/lexer.js

@@ -1,7 +1,7 @@
 (function() {
   var ASSIGNED, CALLABLE, CODE, COFFEE_ALIASES, COFFEE_KEYWORDS, COMMENT, COMPARE, COMPOUND_ASSIGN, CONVERSIONS, HEREDOC, HEREDOC_INDENT, IDENTIFIER, JS_CLEANER, JS_FORBIDDEN, JS_KEYWORDS, LAST_DENT, LAST_DENTS, LINE_BREAK, LOGIC, Lexer, MATH, MULTILINER, MULTI_DENT, NEXT_CHARACTER, NOT_REGEX, NO_NEWLINE, NUMBER, OPERATOR, REGEX_END, REGEX_ESCAPE, REGEX_INTERPOLATION, REGEX_START, RESERVED, Rewriter, SHIFT, STRING_NEWLINES, UNARY, WHITESPACE, _a, _b, _c, compact, count, helpers, include, starts;
   var __slice = Array.prototype.slice;
-  if ((typeof process !== "undefined" && process !== null)) {
+  if (typeof process !== "undefined" && process !== null) {
     _a = require('./rewriter');
     Rewriter = _a.Rewriter;
     _b = require('./helpers');
@@ -491,7 +491,7 @@
         while (i < str.length - 1) {
           if (starts(str, '\\', i)) {
             i += 1;
-          } else if ((expr = this.balancedString(str.substring(i), [['#{', '}']]))) {
+          } else if (expr = this.balancedString(str.substring(i), [['#{', '}']])) {
             if (pi < i) {
               tokens.push(['STRING', quote + str.substring(pi, i) + quote]);
             }
@@ -562,7 +562,7 @@
       if (!(tok = this.prev(index))) {
         return null;
       }
-      if ((typeof newTag !== "undefined" && newTag !== null)) {
+      if (typeof newTag !== "undefined" && newTag !== null) {
         return (tok[0] = newTag);
       }
       return tok[0];
@@ -572,7 +572,7 @@
       if (!(tok = this.prev(index))) {
         return null;
       }
-      if ((typeof val !== "undefined" && val !== null)) {
+      if (typeof val !== "undefined" && val !== null) {
         return (tok[1] = val);
       }
       return tok[1];

lib/nodes.js

@@ -8,7 +8,7 @@
     if (typeof parent.extended === "function") parent.extended(child);
     child.__superClass__ = parent.prototype;
   };
-  if ((typeof process !== "undefined" && process !== null)) {
+  if (typeof process !== "undefined" && process !== null) {
     Scope = require('./scope').Scope;
     helpers = require('./helpers').helpers;
   } else {
@@ -1200,6 +1200,7 @@
       top = del(o, 'top') && !this.returns;
       o.indent = this.idt(1);
       o.top = true;
+      this.condition.parenthetical = true;
       cond = this.condition.compile(o);
       set = '';
       if (!(top)) {
@@ -1702,15 +1703,19 @@
       return this.statement = this.statement || (!!((o && o.top) || this.tags.statement || this.bodyNode().isStatement(o) || (this.elseBody && this.elseBodyNode().isStatement(o))));
     };
     IfNode.prototype.compileCondition = function(o) {
-      var _b, _c, _d, _e, cond;
+      var _b, _c, _d, _e, cond, conditions;
+      conditions = flatten([this.condition]);
+      if (conditions.length === 1) {
+        conditions[0].parenthetical = true;
+      }
       return (function() {
-        _b = []; _d = flatten([this.condition]);
+        _b = []; _d = conditions;
         for (_c = 0, _e = _d.length; _c < _e; _c++) {
           cond = _d[_c];
           _b.push(cond.compile(o));
         }
         return _b;
-      }).call(this).join(' || ');
+      })().join(' || ');
     };
     IfNode.prototype.compileNode = function(o) {
       return this.isStatement(o) ? this.compileStatement(o) : this.compileTernary(o);

lib/optparse.js

@@ -100,7 +100,7 @@
     _b = args;
     for (_a = 0, _c = _b.length; _a < _c; _a++) {
       arg = _b[_a];
-      if ((match = arg.match(MULTI_FLAG))) {
+      if (match = arg.match(MULTI_FLAG)) {
         _e = match[1].split('');
         for (_d = 0, _f = _e.length; _d < _f; _d++) {
           l = _e[_d];

lib/rewriter.js

@@ -1,7 +1,7 @@
 (function() {
   var BALANCED_PAIRS, EXPRESSION_CLOSE, EXPRESSION_END, EXPRESSION_START, IMPLICIT_BLOCK, IMPLICIT_CALL, IMPLICIT_END, IMPLICIT_FUNC, INVERSES, Rewriter, SINGLE_CLOSERS, SINGLE_LINERS, _a, _b, _c, _d, _e, _f, _g, _h, _i, _j, _k, _l, _m, helpers, include, pair;
   var __hasProp = Object.prototype.hasOwnProperty;
-  if ((typeof process !== "undefined" && process !== null)) {
+  if (typeof process !== "undefined" && process !== null) {
     _a = require('./helpers');
     helpers = _a.helpers;
   } else {

src/nodes.coffee

@@ -1033,6 +1033,7 @@ exports.WhileNode = class WhileNode extends BaseNode
     top      =  del(o, 'top') and not @returns
     o.indent =  @idt 1
     o.top    =  true
+    @condition.parenthetical = yes
     cond     =  @condition.compile(o)
     set      =  ''
     unless top
@@ -1417,7 +1418,9 @@ exports.IfNode = class IfNode extends BaseNode
     @statement or= !!((o and o.top) or @tags.statement or @bodyNode().isStatement(o) or (@elseBody and @elseBodyNode().isStatement(o)))
 
   compileCondition: (o) ->
-    (cond.compile(o) for cond in flatten([@condition])).join(' || ')
+    conditions = flatten [@condition]
+    conditions[0].parenthetical = yes if conditions.length is 1
+    (cond.compile(o) for cond in conditions).join(' || ')
 
   compileNode: (o) ->
     if @isStatement(o) then @compileStatement(o) else @compileTernary(o)