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uglify-js

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Comparing version 3.12.7 to 3.12.8

203

lib/ast.js

@@ -116,3 +116,5 @@ /***********************************************************************

},
_validate: noop,
_validate: function() {
if (this.TYPE == "Node") throw new Error("should not instantiate AST_Node");
},
validate: function() {

@@ -191,2 +193,5 @@ var ctor = this.CTOR;

$documentation: "Base class of all statements",
_validate: function() {
if (this.TYPE == "Statement") throw new Error("should not instantiate AST_Statement");
},
});

@@ -220,3 +225,3 @@

if (value instanceof AST_Spread && !allow_spread) throw new Error(prop + " cannot " + multiple + " AST_Spread");
if (value instanceof AST_Statement && !is_function(value)) {
if (value instanceof AST_Statement && !(value instanceof AST_LambdaExpression)) {
throw new Error(prop + " cannot " + multiple + " AST_Statement");

@@ -271,2 +276,3 @@ }

_validate: function() {
if (this.TYPE == "BlockScope") throw new Error("should not instantiate AST_BlockScope");
if (this.parent_scope == null) return;

@@ -296,5 +302,6 @@ if (!(this.parent_scope instanceof AST_BlockScope)) throw new Error("parent_scope must be AST_BlockScope");

_validate: function() {
if (this.TYPE == "Block") throw new Error("should not instantiate AST_Block");
this.body.forEach(function(node) {
if (!(node instanceof AST_Statement)) throw new Error("body must be AST_Statement[]");
if (is_function(node)) throw new Error("body cannot contain AST_Function");
if (node instanceof AST_LambdaExpression) throw new Error("body cannot contain AST_LambdaExpression");
});

@@ -314,4 +321,5 @@ },

_validate: function() {
if (this.TYPE == "StatementWithBody") throw new Error("should not instantiate AST_StatementWithBody");
if (!(this.body instanceof AST_Statement)) throw new Error("body must be AST_Statement");
if (is_function(this.body)) throw new Error("body cannot be AST_Function");
if (this.body instanceof AST_LambdaExpression) throw new Error("body cannot be AST_LambdaExpression");
},

@@ -355,3 +363,6 @@ }, AST_BlockScope);

var AST_IterationStatement = DEFNODE("IterationStatement", null, {
$documentation: "Internal class. All loops inherit from it."
$documentation: "Internal class. All loops inherit from it.",
_validate: function() {
if (this.TYPE == "IterationStatement") throw new Error("should not instantiate AST_IterationStatement");
},
}, AST_StatementWithBody);

@@ -365,2 +376,3 @@

_validate: function() {
if (this.TYPE == "DWLoop") throw new Error("should not instantiate AST_DWLoop");
must_be_expression(this, "condition");

@@ -412,3 +424,3 @@ },

if (this.init instanceof AST_Statement
&& !(this.init instanceof AST_Definitions || is_function(this.init))) {
&& !(this.init instanceof AST_Definitions || this.init instanceof AST_LambdaExpression)) {
throw new Error("init cannot be AST_Statement");

@@ -422,7 +434,7 @@ }

var AST_ForIn = DEFNODE("ForIn", "init object", {
$documentation: "A `for ... in` statement",
var AST_ForEnumeration = DEFNODE("ForEnumeration", "init object", {
$documentation: "Base class for enumeration loops, i.e. `for ... in`, `for ... of` & `for await ... of`",
$propdoc: {
init: "[AST_Node] the `for/in` initialization code",
object: "[AST_Node] the object that we're looping through"
init: "[AST_Node] the assignment target during iteration",
object: "[AST_Node] the object to iterate over"
},

@@ -438,2 +450,3 @@ walk: function(visitor) {

_validate: function() {
if (this.TYPE == "ForEnumeration") throw new Error("should not instantiate AST_ForEnumeration");
if (this.init instanceof AST_Definitions) {

@@ -452,2 +465,14 @@ if (this.init.definitions.length != 1) throw new Error("init must have single declaration");

var AST_ForIn = DEFNODE("ForIn", null, {
$documentation: "A `for ... in` statement",
}, AST_ForEnumeration);
var AST_ForOf = DEFNODE("ForOf", null, {
$documentation: "A `for ... of` statement",
}, AST_ForEnumeration);
var AST_ForAwaitOf = DEFNODE("ForAwaitOf", null, {
$documentation: "A `for await ... of` statement",
}, AST_ForOf);
var AST_With = DEFNODE("With", "expression", {

@@ -482,2 +507,5 @@ $documentation: "A `with` statement",

resolve: return_this,
_validate: function() {
if (this.TYPE == "Scope") throw new Error("should not instantiate AST_Scope");
},
}, AST_Block);

@@ -533,4 +561,5 @@

argnames: "[(AST_DefaultValue|AST_Destructured|AST_SymbolFunarg)*] array of function arguments and/or destructured literals",
length_read: "[boolean/S] whether length property of this function is accessed",
rest: "[(AST_Destructured|AST_SymbolFunarg)?] rest parameter, or null if absent",
uses_arguments: "[boolean/S] tells whether this function accesses the arguments array",
uses_arguments: "[boolean/S] whether this function accesses the arguments array",
},

@@ -566,2 +595,3 @@ each_argname: function(visit) {

_validate: function() {
if (this.TYPE == "Lambda") throw new Error("should not instantiate AST_Lambda");
this.argnames.forEach(function(node) {

@@ -585,10 +615,31 @@ validate_destructured(node, function(node) {

var AST_LambdaExpression = DEFNODE("LambdaExpression", "inlined", {
$documentation: "Base class for function expressions",
$propdoc: {
inlined: "[boolean/S] whether this function has been inlined",
},
_validate: function() {
if (this.TYPE == "LambdaExpression") throw new Error("should not instantiate AST_LambdaExpression");
},
}, AST_Lambda);
function is_arrow(node) {
return node instanceof AST_AsyncArrow || node instanceof AST_Arrow;
return node instanceof AST_Arrow || node instanceof AST_AsyncArrow;
}
function is_function(node) {
return is_arrow(node) || node instanceof AST_AsyncFunction || node instanceof AST_Function;
function is_async(node) {
return node instanceof AST_AsyncArrow
|| node instanceof AST_AsyncDefun
|| node instanceof AST_AsyncFunction
|| node instanceof AST_AsyncGeneratorDefun
|| node instanceof AST_AsyncGeneratorFunction;
}
function is_generator(node) {
return node instanceof AST_AsyncGeneratorDefun
|| node instanceof AST_AsyncGeneratorFunction
|| node instanceof AST_GeneratorDefun
|| node instanceof AST_GeneratorFunction;
}
function walk_lambda(node, tw) {

@@ -602,3 +653,3 @@ if (is_arrow(node) && node.value) {

var AST_Arrow = DEFNODE("Arrow", "inlined value", {
var AST_Arrow = DEFNODE("Arrow", "value", {
$documentation: "An arrow function expression",

@@ -630,9 +681,5 @@ $propdoc: {

},
}, AST_Lambda);
}, AST_LambdaExpression);
function is_async(node) {
return node instanceof AST_AsyncArrow || node instanceof AST_AsyncDefun || node instanceof AST_AsyncFunction;
}
var AST_AsyncArrow = DEFNODE("AsyncArrow", "inlined value", {
var AST_AsyncArrow = DEFNODE("AsyncArrow", "value", {
$documentation: "An asynchronous arrow function expression",

@@ -664,5 +711,5 @@ $propdoc: {

},
}, AST_Lambda);
}, AST_LambdaExpression);
var AST_AsyncFunction = DEFNODE("AsyncFunction", "inlined name", {
var AST_AsyncFunction = DEFNODE("AsyncFunction", "name", {
$documentation: "An asynchronous function expression",

@@ -677,5 +724,17 @@ $propdoc: {

},
}, AST_Lambda);
}, AST_LambdaExpression);
var AST_Function = DEFNODE("Function", "inlined name", {
var AST_AsyncGeneratorFunction = DEFNODE("AsyncGeneratorFunction", "name", {
$documentation: "An asynchronous generator function expression",
$propdoc: {
name: "[AST_SymbolLambda?] the name of this function",
},
_validate: function() {
if (this.name != null) {
if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
}
},
}, AST_LambdaExpression);
var AST_Function = DEFNODE("Function", "name", {
$documentation: "A function expression",

@@ -690,24 +749,24 @@ $propdoc: {

},
}, AST_Lambda);
}, AST_LambdaExpression);
function is_defun(node) {
return node instanceof AST_AsyncDefun || node instanceof AST_Defun;
}
var AST_AsyncDefun = DEFNODE("AsyncDefun", "inlined name", {
$documentation: "An asynchronous function definition",
var AST_GeneratorFunction = DEFNODE("GeneratorFunction", "name", {
$documentation: "A generator function expression",
$propdoc: {
name: "[AST_SymbolDefun] the name of this function",
name: "[AST_SymbolLambda?] the name of this function",
},
_validate: function() {
if (!(this.name instanceof AST_SymbolDefun)) throw new Error("name must be AST_SymbolDefun");
if (this.name != null) {
if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
}
},
}, AST_Lambda);
}, AST_LambdaExpression);
var AST_Defun = DEFNODE("Defun", "inlined name", {
$documentation: "A function definition",
var AST_LambdaDefinition = DEFNODE("LambdaDefinition", "inlined name", {
$documentation: "Base class for function definitions",
$propdoc: {
inlined: "[boolean/S] whether this function has been inlined",
name: "[AST_SymbolDefun] the name of this function",
},
_validate: function() {
if (this.TYPE == "LambdaDefinition") throw new Error("should not instantiate AST_LambdaDefinition");
if (!(this.name instanceof AST_SymbolDefun)) throw new Error("name must be AST_SymbolDefun");

@@ -717,6 +776,25 @@ },

var AST_AsyncDefun = DEFNODE("AsyncDefun", null, {
$documentation: "An asynchronous function definition",
}, AST_LambdaDefinition);
var AST_AsyncGeneratorDefun = DEFNODE("AsyncGeneratorDefun", null, {
$documentation: "An asynchronous generator function definition",
}, AST_LambdaDefinition);
var AST_Defun = DEFNODE("Defun", null, {
$documentation: "A function definition",
}, AST_LambdaDefinition);
var AST_GeneratorDefun = DEFNODE("GeneratorDefun", null, {
$documentation: "A generator function definition",
}, AST_LambdaDefinition);
/* -----[ JUMPS ]----- */
var AST_Jump = DEFNODE("Jump", null, {
$documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)"
$documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)",
_validate: function() {
if (this.TYPE == "Jump") throw new Error("should not instantiate AST_Jump");
},
}, AST_Statement);

@@ -734,3 +812,6 @@

});
}
},
_validate: function() {
if (this.TYPE == "Exit") throw new Error("should not instantiate AST_Exit");
},
}, AST_Jump);

@@ -764,2 +845,3 @@

_validate: function() {
if (this.TYPE == "LoopControl") throw new Error("should not instantiate AST_LoopControl");
if (this.label != null) {

@@ -799,3 +881,3 @@ if (!(this.label instanceof AST_LabelRef)) throw new Error("label must be AST_LabelRef");

if (!(this.alternative instanceof AST_Statement)) throw new Error("alternative must be AST_Statement");
if (is_function(this.alternative)) throw new error("alternative cannot be AST_Function");
if (this.alternative instanceof AST_LambdaExpression) throw new error("alternative cannot be AST_LambdaExpression");
}

@@ -829,2 +911,5 @@ },

$documentation: "Base class for `switch` branches",
_validate: function() {
if (this.TYPE == "SwitchBranch") throw new Error("should not instantiate AST_SwitchBranch");
},
}, AST_Block);

@@ -918,2 +1003,3 @@

_validate: function() {
if (this.TYPE == "Definitions") throw new Error("should not instantiate AST_Definitions");
if (this.definitions.length < 1) throw new Error("must have at least one definition");

@@ -1066,2 +1152,3 @@ },

_validate: function() {
if (this.TYPE == "PropAccess") throw new Error("should not instantiate AST_PropAccess");
must_be_expression(this, "expression");

@@ -1127,2 +1214,3 @@ },

_validate: function() {
if (this.TYPE == "Unary") throw new Error("should not instantiate AST_Unary");
if (typeof this.operator != "string") throw new Error("operator must be string");

@@ -1215,2 +1303,23 @@ must_be_expression(this, "expression");

var AST_Yield = DEFNODE("Yield", "expression nested", {
$documentation: "A yield expression",
$propdoc: {
expression: "[AST_Node?] return value for iterator, or null if undefined",
nested: "[boolean] whether to iterate over expression as generator",
},
walk: function(visitor) {
var node = this;
visitor.visit(node, function() {
if (node.expression) node.expression.walk(visitor);
});
},
_validate: function() {
if (this.expression != null) {
must_be_expression(this, "expression");
} else if (this.nested) {
throw new Error("yield* must contain expression");
}
},
});
/* -----[ LITERALS ]----- */

@@ -1241,2 +1350,5 @@

},
_validate: function() {
if (this.TYPE == "Destructured") throw new Error("should not instantiate AST_Destructured");
},
});

@@ -1353,2 +1465,3 @@

_validate: function() {
if (this.TYPE == "ObjectProperty") throw new Error("should not instantiate AST_ObjectProperty");
if (typeof this.key != "string") {

@@ -1391,2 +1504,3 @@ if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");

_validate: function() {
if (this.TYPE == "Symbol") throw new Error("should not instantiate AST_Symbol");
if (typeof this.name != "string") throw new Error("name must be string");

@@ -1484,2 +1598,5 @@ },

$documentation: "Base class for all constants",
_validate: function() {
if (this.TYPE == "Constant") throw new Error("should not instantiate AST_Constant");
},
});

@@ -1533,2 +1650,5 @@

$documentation: "Base class for atoms",
_validate: function() {
if (this.TYPE == "Atom") throw new Error("should not instantiate AST_Atom");
},
}, AST_Constant);

@@ -1563,2 +1683,5 @@

$documentation: "Base class for booleans",
_validate: function() {
if (this.TYPE == "Boolean") throw new Error("should not instantiate AST_Boolean");
},
}, AST_Atom);

@@ -1565,0 +1688,0 @@

94

lib/output.js

@@ -676,3 +676,5 @@ /***********************************************************************

PARENS(AST_AsyncFunction, needs_parens_function);
PARENS(AST_AsyncGeneratorFunction, needs_parens_function);
PARENS(AST_Function, needs_parens_function);
PARENS(AST_GeneratorFunction, needs_parens_function);

@@ -686,10 +688,15 @@ // same goes for an object literal, because otherwise it would be

PARENS(AST_Unary, function(output) {
function needs_parens_unary(output) {
var p = output.parent();
// (-x) ** y
if (p instanceof AST_Binary) return p.operator == "**" && p.left === this;
// (x++).toString(3)
// (typeof x).length
return (p instanceof AST_Call || p instanceof AST_PropAccess) && p.expression === this;
});
// (await x)(y)
// new (await x)
if (p instanceof AST_Call) return p.expression === this;
// (x++)[y]
// (typeof x).y
if (p instanceof AST_PropAccess) return p.expression === this;
}
PARENS(AST_Await, needs_parens_unary);
PARENS(AST_Unary, needs_parens_unary);

@@ -713,5 +720,9 @@ PARENS(AST_Sequence, function(output) {

|| p instanceof AST_DefaultValue
// { [(1, 2)]: foo } = bar
// { 1: (2, foo) } = bar
|| p instanceof AST_DestructuredKeyVal
// for (foo of (bar, baz));
|| p instanceof AST_ForOf
// { [(1, 2)]: 3 }[2] ---> 3
// { foo: (1, 2) }.foo ---> 2
|| p instanceof AST_DestructuredKeyVal
|| p instanceof AST_ObjectProperty

@@ -725,3 +736,5 @@ // (1, {foo:2}).foo or (1, {foo:2})["foo"] ---> 2

// var a = (1, 2), b = a + a; ---> b == 4
|| p instanceof AST_VarDef;
|| p instanceof AST_VarDef
// yield (foo, bar)
|| p instanceof AST_Yield;
});

@@ -833,13 +846,4 @@

});
PARENS(AST_Await, function(output) {
var p = output.parent();
// (await x) ** y
if (p instanceof AST_Binary) return p.operator == "**" && p.left === this;
// new (await foo)
// (await foo)(bar)
if (p instanceof AST_Call) return p.expression === this;
// (await foo).prop
// (await foo)["prop"]
if (p instanceof AST_PropAccess) return p.expression === this;
PARENS(AST_Yield, function(output) {
return needs_parens_assign_cond(this, output);
});

@@ -986,16 +990,21 @@

});
DEFPRINT(AST_ForIn, function(output) {
var self = this;
output.print("for");
output.space();
output.with_parens(function() {
self.init.print(output);
function print_for_enum(prefix, infix) {
return function(output) {
var self = this;
output.print(prefix);
output.space();
output.print("in");
output.with_parens(function() {
self.init.print(output);
output.space();
output.print(infix);
output.space();
self.object.print(output);
});
output.space();
self.object.print(output);
});
output.space();
force_statement(self.body, output);
});
force_statement(self.body, output);
};
}
DEFPRINT(AST_ForAwaitOf, print_for_enum("for await", "of"));
DEFPRINT(AST_ForIn, print_for_enum("for", "in"));
DEFPRINT(AST_ForOf, print_for_enum("for", "of"));
DEFPRINT(AST_With, function(output) {

@@ -1070,2 +1079,16 @@ var self = this;

DEFPRINT(AST_AsyncFunction, print_async);
function print_async_generator(output) {
output.print("async");
output.space();
output.print("function*");
print_lambda(this, output);
}
DEFPRINT(AST_AsyncGeneratorDefun, print_async_generator);
DEFPRINT(AST_AsyncGeneratorFunction, print_async_generator);
function print_generator(output) {
output.print("function*");
print_lambda(this, output);
}
DEFPRINT(AST_GeneratorDefun, print_generator);
DEFPRINT(AST_GeneratorFunction, print_generator);

@@ -1222,3 +1245,3 @@ /* -----[ jumps ]----- */

var p = output.parent();
if (p && p.init !== self || !(p instanceof AST_For || p instanceof AST_ForIn)) output.semicolon();
if (!(p instanceof AST_IterationStatement && p.init === self)) output.semicolon();
};

@@ -1250,3 +1273,3 @@ }

var p = output.parent(1);
var noin = p instanceof AST_For || p instanceof AST_ForIn;
var noin = p instanceof AST_For || p instanceof AST_ForEnumeration;
parenthesize_for_noin(self.value, output, noin);

@@ -1372,2 +1395,9 @@ }

});
DEFPRINT(AST_Yield, function(output) {
output.print(this.nested ? "yield*" : "yield");
if (this.expression) {
output.space();
this.expression.print(output);
}
});

@@ -1374,0 +1404,0 @@ /* -----[ literals ]----- */

6

lib/scope.js

@@ -124,3 +124,3 @@ /***********************************************************************

var tw = new TreeWalker(function(node, descend) {
if (is_defun(node)) {
if (node instanceof AST_LambdaDefinition) {
node.name.walk(tw);

@@ -443,3 +443,3 @@ walk_scope(function() {

var def = this.def_variable(symbol, init);
if (!def.init || is_defun(def.init)) def.init = init;
if (!def.init || def.init instanceof AST_LambdaDefinition) def.init = init;
this.functions.set(symbol.name, def);

@@ -453,3 +453,3 @@ return def;

def.orig.push(symbol);
if (is_function(def.init)) def.init = init;
if (def.init instanceof AST_LambdaExpression) def.init = init;
} else {

@@ -456,0 +456,0 @@ def = this.make_def(symbol, init);

5

lib/transform.js

@@ -85,3 +85,3 @@ /***********************************************************************

});
DEF(AST_ForIn, function(self, tw) {
DEF(AST_ForEnumeration, function(self, tw) {
self.init = self.init.transform(tw);

@@ -161,2 +161,5 @@ self.object = self.object.transform(tw);

});
DEF(AST_Yield, function(self, tw) {
if (self.expression) self.expression = self.expression.transform(tw);
});
DEF(AST_Dot, function(self, tw) {

@@ -163,0 +166,0 @@ self.expression = self.expression.transform(tw);

2

package.json

@@ -6,3 +6,3 @@ {

"license": "BSD-2-Clause",
"version": "3.12.7",
"version": "3.12.8",
"engines": {

@@ -9,0 +9,0 @@ "node": ">=0.8.0"

11

README.md

@@ -814,2 +814,4 @@ UglifyJS 3

- `yields` (default: `true`) -- apply optimizations to `yield` expressions
## Mangle options

@@ -1274,1 +1276,10 @@

UglifyJS may modify the input which in turn may suppress those errors.
- Some versions of JavaScript will throw `SyntaxError` with the
following:
```javascript
try {} catch (e) {
for (var e of []);
}
// SyntaxError: Identifier 'e' has already been declared
```
UglifyJS may modify the input which in turn may suppress those errors.
lib/compress.js

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lib/parse.js

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