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output.js
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/***********************************************************************
A JavaScript tokenizer / parser / beautifier / compressor.
https://github.com/mishoo/UglifyJS2
-------------------------------- (C) ---------------------------------
Author: Mihai Bazon
http://mihai.bazon.net/blog
Distributed under the BSD license:
Copyright 2012 (c) Mihai Bazon <[email protected]>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the following
disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials
provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “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 COPYRIGHT HOLDER 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.
***********************************************************************/
"use strict";
var EXPECT_DIRECTIVE = /^$|[;{][\s\n]*$/;
function is_some_comments(comment) {
var text = comment.value;
var type = comment.type;
if (type == "comment2") {
// multiline comment
return /@preserve|@license|@cc_on/i.test(text);
}
return type == "comment5";
}
function is_comment5(comment) {
return comment.type == "comment5";
}
function OutputStream(options) {
options = defaults(options, {
indent_start : 0,
indent_level : 4,
quote_keys : false,
space_colon : true,
ascii_only : false,
unescape_regexps : false,
inline_script : false,
width : 80,
max_line_len : false,
beautify : false,
source_map : null,
bracketize : false,
semicolons : true,
comments : false,
shebang : true,
preserve_line : false,
screw_ie8 : true,
preamble : null,
quote_style : 0,
keep_quoted_props: false,
wrap_iife : false,
}, true);
// Convert comment option to RegExp if neccessary and set up comments filter
var comment_filter = options.shebang ? is_comment5 : return_false; // Default case, throw all comments away except shebangs
if (options.comments) {
var comments = options.comments;
if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) {
var regex_pos = options.comments.lastIndexOf("/");
comments = new RegExp(
options.comments.substr(1, regex_pos - 1),
options.comments.substr(regex_pos + 1)
);
}
if (comments instanceof RegExp) {
comment_filter = function(comment) {
return comment.type == "comment5" || comments.test(comment.value);
};
}
else if (typeof comments === "function") {
comment_filter = function(comment) {
return comment.type == "comment5" || comments(this, comment);
};
}
else if (comments === "some") {
comment_filter = is_some_comments;
} else { // NOTE includes "all" option
comment_filter = return_true;
}
}
var indentation = 0;
var current_col = 0;
var current_line = 1;
var current_pos = 0;
var OUTPUT = "";
function to_ascii(str, identifier) {
return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
var code = ch.charCodeAt(0).toString(16);
if (code.length <= 2 && !identifier) {
while (code.length < 2) code = "0" + code;
return "\\x" + code;
} else {
while (code.length < 4) code = "0" + code;
return "\\u" + code;
}
});
};
function make_string(str, quote) {
var dq = 0, sq = 0;
str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
function(s, i){
switch (s) {
case '"': ++dq; return '"';
case "'": ++sq; return "'";
case "\\": return "\\\\";
case "\n": return "\\n";
case "\r": return "\\r";
case "\t": return "\\t";
case "\b": return "\\b";
case "\f": return "\\f";
case "\x0B": return options.screw_ie8 ? "\\v" : "\\x0B";
case "\u2028": return "\\u2028";
case "\u2029": return "\\u2029";
case "\ufeff": return "\\ufeff";
case "\0":
return /[0-7]/.test(str.charAt(i+1)) ? "\\x00" : "\\0";
}
return s;
});
function quote_single() {
return "'" + str.replace(/\x27/g, "\\'") + "'";
}
function quote_double() {
return '"' + str.replace(/\x22/g, '\\"') + '"';
}
if (options.ascii_only) str = to_ascii(str);
switch (options.quote_style) {
case 1:
return quote_single();
case 2:
return quote_double();
case 3:
return quote == "'" ? quote_single() : quote_double();
default:
return dq > sq ? quote_single() : quote_double();
}
};
function encode_string(str, quote) {
var ret = make_string(str, quote);
if (options.inline_script) {
ret = ret.replace(/<\x2fscript([>\/\t\n\f\r ])/gi, "<\\/script$1");
ret = ret.replace(/\x3c!--/g, "\\x3c!--");
ret = ret.replace(/--\x3e/g, "--\\x3e");
}
return ret;
};
function make_name(name) {
name = name.toString();
if (options.ascii_only)
name = to_ascii(name, true);
return name;
};
function make_indent(back) {
return repeat_string(" ", options.indent_start + indentation - back * options.indent_level);
};
/* -----[ beautification/minification ]----- */
var might_need_space = false;
var might_need_semicolon = false;
var might_add_newline = 0;
var last = null;
function last_char() {
return last.charAt(last.length - 1);
};
var ensure_line_len = options.max_line_len ? function() {
if (current_col > options.max_line_len) {
if (might_add_newline) {
var left = OUTPUT.slice(0, might_add_newline);
var right = OUTPUT.slice(might_add_newline);
OUTPUT = left + "\n" + right;
current_line++;
current_pos++;
current_col = right.length;
}
if (current_col > options.max_line_len) {
AST_Node.warn("Output exceeds {max_line_len} characters", options);
}
}
might_add_newline = 0;
} : noop;
var requireSemicolonChars = makePredicate("( [ + * / - , .");
function print(str) {
str = String(str);
var ch = str.charAt(0);
if (might_need_semicolon) {
might_need_semicolon = false;
if ((!ch || ";}".indexOf(ch) < 0) && !/[;]$/.test(last)) {
if (options.semicolons || requireSemicolonChars(ch)) {
OUTPUT += ";";
current_col++;
current_pos++;
} else {
ensure_line_len();
OUTPUT += "\n";
current_pos++;
current_line++;
current_col = 0;
if (/^\s+$/.test(str)) {
// reset the semicolon flag, since we didn't print one
// now and might still have to later
might_need_semicolon = true;
}
}
if (!options.beautify)
might_need_space = false;
}
}
if (!options.beautify && options.preserve_line && stack[stack.length - 1]) {
var target_line = stack[stack.length - 1].start.line;
while (current_line < target_line) {
ensure_line_len();
OUTPUT += "\n";
current_pos++;
current_line++;
current_col = 0;
might_need_space = false;
}
}
if (might_need_space) {
var prev = last_char();
if ((is_identifier_char(prev)
&& (is_identifier_char(ch) || ch == "\\"))
|| (ch == "/" && ch == prev)
|| ((ch == "+" || ch == "-") && ch == last))
{
OUTPUT += " ";
current_col++;
current_pos++;
}
might_need_space = false;
}
OUTPUT += str;
current_pos += str.length;
var a = str.split(/\r?\n/), n = a.length - 1;
current_line += n;
current_col += a[0].length;
if (n > 0) {
ensure_line_len();
current_col = a[n].length;
}
last = str;
};
var space = options.beautify ? function() {
print(" ");
} : function() {
might_need_space = true;
};
var indent = options.beautify ? function(half) {
if (options.beautify) {
print(make_indent(half ? 0.5 : 0));
}
} : noop;
var with_indent = options.beautify ? function(col, cont) {
if (col === true) col = next_indent();
var save_indentation = indentation;
indentation = col;
var ret = cont();
indentation = save_indentation;
return ret;
} : function(col, cont) { return cont() };
var newline = options.beautify ? function() {
print("\n");
} : options.max_line_len ? function() {
ensure_line_len();
might_add_newline = OUTPUT.length;
} : noop;
var semicolon = options.beautify ? function() {
print(";");
} : function() {
might_need_semicolon = true;
};
function force_semicolon() {
might_need_semicolon = false;
print(";");
};
function next_indent() {
return indentation + options.indent_level;
};
function with_block(cont) {
var ret;
print("{");
newline();
with_indent(next_indent(), function(){
ret = cont();
});
indent();
print("}");
return ret;
};
function with_parens(cont) {
print("(");
//XXX: still nice to have that for argument lists
//var ret = with_indent(current_col, cont);
var ret = cont();
print(")");
return ret;
};
function with_square(cont) {
print("[");
//var ret = with_indent(current_col, cont);
var ret = cont();
print("]");
return ret;
};
function comma() {
print(",");
space();
};
function colon() {
print(":");
if (options.space_colon) space();
};
var add_mapping = options.source_map ? function(token, name) {
try {
if (token) options.source_map.add(
token.file || "?",
current_line, current_col,
token.line, token.col,
(!name && token.type == "name") ? token.value : name
);
} catch(ex) {
AST_Node.warn("Couldn't figure out mapping for {file}:{line},{col} → {cline},{ccol} [{name}]", {
file: token.file,
line: token.line,
col: token.col,
cline: current_line,
ccol: current_col,
name: name || ""
})
}
} : noop;
function get() {
if (might_add_newline) {
ensure_line_len();
}
return OUTPUT;
};
if (options.preamble) {
print(options.preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
}
var stack = [];
return {
get : get,
toString : get,
indent : indent,
indentation : function() { return indentation },
current_width : function() { return current_col - indentation },
should_break : function() { return options.width && this.current_width() >= options.width },
newline : newline,
print : print,
space : space,
comma : comma,
colon : colon,
last : function() { return last },
semicolon : semicolon,
force_semicolon : force_semicolon,
to_ascii : to_ascii,
print_name : function(name) { print(make_name(name)) },
print_string : function(str, quote, escape_directive) {
var encoded = encode_string(str, quote);
if (escape_directive === true && encoded.indexOf("\\") === -1) {
// Insert semicolons to break directive prologue
if (!EXPECT_DIRECTIVE.test(OUTPUT)) {
force_semicolon();
}
force_semicolon();
}
print(encoded);
},
encode_string : encode_string,
next_indent : next_indent,
with_indent : with_indent,
with_block : with_block,
with_parens : with_parens,
with_square : with_square,
add_mapping : add_mapping,
option : function(opt) { return options[opt] },
comment_filter : comment_filter,
line : function() { return current_line },
col : function() { return current_col },
pos : function() { return current_pos },
push_node : function(node) { stack.push(node) },
pop_node : function() { return stack.pop() },
parent : function(n) {
return stack[stack.length - 2 - (n || 0)];
}
};
};
/* -----[ code generators ]----- */
(function(){
/* -----[ utils ]----- */
function DEFPRINT(nodetype, generator) {
nodetype.DEFMETHOD("_codegen", generator);
};
var use_asm = false;
var in_directive = false;
AST_Node.DEFMETHOD("print", function(stream, force_parens){
var self = this, generator = self._codegen, prev_use_asm = use_asm;
if (self instanceof AST_Directive && self.value == "use asm" && stream.parent() instanceof AST_Scope) {
use_asm = true;
}
function doit() {
self.add_comments(stream);
self.add_source_map(stream);
generator(self, stream);
}
stream.push_node(self);
if (force_parens || self.needs_parens(stream)) {
stream.with_parens(doit);
} else {
doit();
}
stream.pop_node();
if (self instanceof AST_Scope) {
use_asm = prev_use_asm;
}
});
AST_Node.DEFMETHOD("print_to_string", function(options){
var s = OutputStream(options);
if (!options) s._readonly = true;
this.print(s);
return s.get();
});
/* -----[ comments ]----- */
AST_Node.DEFMETHOD("add_comments", function(output){
if (output._readonly) return;
var self = this;
var start = self.start;
if (start && !start._comments_dumped) {
start._comments_dumped = true;
var comments = start.comments_before || [];
// XXX: ugly fix for https://github.com/mishoo/UglifyJS2/issues/112
// and https://github.com/mishoo/UglifyJS2/issues/372
if (self instanceof AST_Exit && self.value) {
self.value.walk(new TreeWalker(function(node){
if (node.start && node.start.comments_before) {
comments = comments.concat(node.start.comments_before);
node.start.comments_before = [];
}
if (node instanceof AST_Function ||
node instanceof AST_Array ||
node instanceof AST_Object)
{
return true; // don't go inside.
}
}));
}
comments = comments.filter(output.comment_filter, self);
// Keep single line comments after nlb, after nlb
if (!output.option("beautify") && comments.length > 0 &&
/comment[134]/.test(comments[0].type) &&
output.col() !== 0 && comments[0].nlb)
{
output.print("\n");
}
comments.forEach(function(c){
if (/comment[134]/.test(c.type)) {
output.print("//" + c.value + "\n");
output.indent();
}
else if (c.type == "comment2") {
output.print("/*" + c.value + "*/");
if (start.nlb) {
output.print("\n");
output.indent();
} else {
output.space();
}
}
else if (output.pos() === 0 && c.type == "comment5" && output.option("shebang")) {
output.print("#!" + c.value + "\n");
output.indent();
}
});
}
});
/* -----[ PARENTHESES ]----- */
function PARENS(nodetype, func) {
if (Array.isArray(nodetype)) {
nodetype.forEach(function(nodetype){
PARENS(nodetype, func);
});
} else {
nodetype.DEFMETHOD("needs_parens", func);
}
};
PARENS(AST_Node, function(){
return false;
});
// a function expression needs parens around it when it's provably
// the first token to appear in a statement.
PARENS(AST_Function, function(output){
if (first_in_statement(output)) {
return true;
}
if (output.option('wrap_iife')) {
var p = output.parent();
return p instanceof AST_Call && p.expression === this;
}
return false;
});
// same goes for an object literal, because otherwise it would be
// interpreted as a block of code.
PARENS(AST_Object, function(output){
return first_in_statement(output);
});
PARENS([ AST_Unary, AST_Undefined ], function(output){
var p = output.parent();
return p instanceof AST_PropAccess && p.expression === this
|| p instanceof AST_Call && p.expression === this;
});
PARENS(AST_Seq, function(output){
var p = output.parent();
return p instanceof AST_Call // (foo, bar)() or foo(1, (2, 3), 4)
|| p instanceof AST_Unary // !(foo, bar, baz)
|| p instanceof AST_Binary // 1 + (2, 3) + 4 ==> 8
|| p instanceof AST_VarDef // var a = (1, 2), b = a + a; ==> b == 4
|| p instanceof AST_PropAccess // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2
|| p instanceof AST_Array // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
|| p instanceof AST_ObjectProperty // { foo: (1, 2) }.foo ==> 2
|| p instanceof AST_Conditional /* (false, true) ? (a = 10, b = 20) : (c = 30)
* ==> 20 (side effect, set a := 10 and b := 20) */
;
});
PARENS(AST_Binary, function(output){
var p = output.parent();
// (foo && bar)()
if (p instanceof AST_Call && p.expression === this)
return true;
// typeof (foo && bar)
if (p instanceof AST_Unary)
return true;
// (foo && bar)["prop"], (foo && bar).prop
if (p instanceof AST_PropAccess && p.expression === this)
return true;
// this deals with precedence: 3 * (2 + 1)
if (p instanceof AST_Binary) {
var po = p.operator, pp = PRECEDENCE[po];
var so = this.operator, sp = PRECEDENCE[so];
if (pp > sp
|| (pp == sp
&& this === p.right)) {
return true;
}
}
});
PARENS(AST_PropAccess, function(output){
var p = output.parent();
if (p instanceof AST_New && p.expression === this) {
// i.e. new (foo.bar().baz)
//
// if there's one call into this subtree, then we need
// parens around it too, otherwise the call will be
// interpreted as passing the arguments to the upper New
// expression.
try {
this.walk(new TreeWalker(function(node){
if (node instanceof AST_Call) throw p;
}));
} catch(ex) {
if (ex !== p) throw ex;
return true;
}
}
});
PARENS(AST_Call, function(output){
var p = output.parent(), p1;
if (p instanceof AST_New && p.expression === this)
return true;
// workaround for Safari bug.
// https://bugs.webkit.org/show_bug.cgi?id=123506
return this.expression instanceof AST_Function
&& p instanceof AST_PropAccess
&& p.expression === this
&& (p1 = output.parent(1)) instanceof AST_Assign
&& p1.left === p;
});
PARENS(AST_New, function(output){
var p = output.parent();
if (!need_constructor_parens(this, output)
&& (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]()
|| p instanceof AST_Call && p.expression === this)) // (new foo)(bar)
return true;
});
PARENS(AST_Number, function(output){
var p = output.parent();
if (p instanceof AST_PropAccess && p.expression === this) {
var value = this.getValue();
if (value < 0 || /^0/.test(make_num(value))) {
return true;
}
}
});
PARENS([ AST_Assign, AST_Conditional ], function (output){
var p = output.parent();
// !(a = false) → true
if (p instanceof AST_Unary)
return true;
// 1 + (a = 2) + 3 → 6, side effect setting a = 2
if (p instanceof AST_Binary && !(p instanceof AST_Assign))
return true;
// (a = func)() —or— new (a = Object)()
if (p instanceof AST_Call && p.expression === this)
return true;
// (a = foo) ? bar : baz
if (p instanceof AST_Conditional && p.condition === this)
return true;
// (a = foo)["prop"] —or— (a = foo).prop
if (p instanceof AST_PropAccess && p.expression === this)
return true;
});
/* -----[ PRINTERS ]----- */
DEFPRINT(AST_Directive, function(self, output){
output.print_string(self.value, self.quote);
output.semicolon();
});
DEFPRINT(AST_Debugger, function(self, output){
output.print("debugger");
output.semicolon();
});
/* -----[ statements ]----- */
function display_body(body, is_toplevel, output, allow_directives) {
var last = body.length - 1;
in_directive = allow_directives;
body.forEach(function(stmt, i){
if (in_directive === true && !(stmt instanceof AST_Directive ||
stmt instanceof AST_EmptyStatement ||
(stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String)
)) {
in_directive = false;
}
if (!(stmt instanceof AST_EmptyStatement)) {
output.indent();
stmt.print(output);
if (!(i == last && is_toplevel)) {
output.newline();
if (is_toplevel) output.newline();
}
}
if (in_directive === true &&
stmt instanceof AST_SimpleStatement &&
stmt.body instanceof AST_String
) {
in_directive = false;
}
});
in_directive = false;
};
AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output){
force_statement(this.body, output);
});
DEFPRINT(AST_Statement, function(self, output){
self.body.print(output);
output.semicolon();
});
DEFPRINT(AST_Toplevel, function(self, output){
display_body(self.body, true, output, true);
output.print("");
});
DEFPRINT(AST_LabeledStatement, function(self, output){
self.label.print(output);
output.colon();
self.body.print(output);
});
DEFPRINT(AST_SimpleStatement, function(self, output){
self.body.print(output);
output.semicolon();
});
function print_bracketed(body, output, allow_directives) {
if (body.length > 0) output.with_block(function(){
display_body(body, false, output, allow_directives);
});
else output.print("{}");
};
DEFPRINT(AST_BlockStatement, function(self, output){
print_bracketed(self.body, output);
});
DEFPRINT(AST_EmptyStatement, function(self, output){
output.semicolon();
});
DEFPRINT(AST_Do, function(self, output){
output.print("do");
output.space();
self._do_print_body(output);
output.space();
output.print("while");
output.space();
output.with_parens(function(){
self.condition.print(output);
});
output.semicolon();
});
DEFPRINT(AST_While, function(self, output){
output.print("while");
output.space();
output.with_parens(function(){
self.condition.print(output);
});
output.space();
self._do_print_body(output);
});
DEFPRINT(AST_For, function(self, output){
output.print("for");
output.space();
output.with_parens(function(){
if (self.init && !(self.init instanceof AST_EmptyStatement)) {
if (self.init instanceof AST_Definitions) {
self.init.print(output);
} else {
parenthesize_for_noin(self.init, output, true);
}
output.print(";");
output.space();
} else {
output.print(";");
}
if (self.condition) {
self.condition.print(output);
output.print(";");
output.space();
} else {
output.print(";");
}
if (self.step) {
self.step.print(output);
}
});
output.space();
self._do_print_body(output);
});
DEFPRINT(AST_ForIn, function(self, output){
output.print("for");
output.space();
output.with_parens(function(){
self.init.print(output);
output.space();
output.print("in");
output.space();
self.object.print(output);
});
output.space();
self._do_print_body(output);
});
DEFPRINT(AST_With, function(self, output){
output.print("with");
output.space();
output.with_parens(function(){
self.expression.print(output);
});
output.space();
self._do_print_body(output);
});
/* -----[ functions ]----- */
AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword){
var self = this;
if (!nokeyword) {
output.print("function");
}
if (self.name) {
output.space();
self.name.print(output);
}
output.with_parens(function(){
self.argnames.forEach(function(arg, i){
if (i) output.comma();
arg.print(output);
});
});
output.space();
print_bracketed(self.body, output, true);
});
DEFPRINT(AST_Lambda, function(self, output){
self._do_print(output);
});
/* -----[ exits ]----- */
AST_Exit.DEFMETHOD("_do_print", function(output, kind){
output.print(kind);
if (this.value) {
output.space();
this.value.print(output);
}
output.semicolon();
});
DEFPRINT(AST_Return, function(self, output){
self._do_print(output, "return");
});
DEFPRINT(AST_Throw, function(self, output){
self._do_print(output, "throw");
});
/* -----[ loop control ]----- */
AST_LoopControl.DEFMETHOD("_do_print", function(output, kind){
output.print(kind);
if (this.label) {
output.space();
this.label.print(output);
}
output.semicolon();
});
DEFPRINT(AST_Break, function(self, output){
self._do_print(output, "break");
});
DEFPRINT(AST_Continue, function(self, output){
self._do_print(output, "continue");
});
/* -----[ if ]----- */
function make_then(self, output) {
if (output.option("bracketize")) {
make_block(self.body, output);
return;
}
// The squeezer replaces "block"-s that contain only a single
// statement with the statement itself; technically, the AST
// is correct, but this can create problems when we output an
// IF having an ELSE clause where the THEN clause ends in an
// IF *without* an ELSE block (then the outer ELSE would refer
// to the inner IF). This function checks for this case and
// adds the block brackets if needed.
if (!self.body)
return output.force_semicolon();
if (self.body instanceof AST_Do) {
// Unconditionally use the if/do-while workaround for all browsers.
// https://github.com/mishoo/UglifyJS/issues/#issue/57 IE
// croaks with "syntax error" on code like this: if (foo)
// do ... while(cond); else ... we need block brackets
// around do/while
make_block(self.body, output);
return;
}
var b = self.body;
while (true) {
if (b instanceof AST_If) {
if (!b.alternative) {
make_block(self.body, output);
return;
}
b = b.alternative;
}
else if (b instanceof AST_StatementWithBody) {
b = b.body;
}
else break;
}
force_statement(self.body, output);
};
DEFPRINT(AST_If, function(self, output){
output.print("if");
output.space();
output.with_parens(function(){
self.condition.print(output);
});
output.space();
if (self.alternative) {
make_then(self, output);
output.space();
output.print("else");
output.space();
if (self.alternative instanceof AST_If)
self.alternative.print(output);
else
force_statement(self.alternative, output);
} else {
self._do_print_body(output);
}
});
/* -----[ switch ]----- */
DEFPRINT(AST_Switch, function(self, output){
output.print("switch");
output.space();
output.with_parens(function(){
self.expression.print(output);
});
output.space();
if (self.body.length > 0) output.with_block(function(){
self.body.forEach(function(stmt, i){
if (i) output.newline();
output.indent(true);
stmt.print(output);
});
});
else output.print("{}");
});
AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output){
if (this.body.length > 0) {
output.newline();
this.body.forEach(function(stmt){
output.indent();
stmt.print(output);
output.newline();
});
}
});
DEFPRINT(AST_Default, function(self, output){
output.print("default:");