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Merge branch 'master' into harmony-v3.1.2

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This commit is contained in:
alexlamsl
2017-09-24 02:20:47 +08:00
parent 1241600013 55387e8fd0
commit bd84007cf4
6 changed files with 151 additions and 15 deletions
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6
lib/ast.js
View File

@@ -134,11 +134,10 @@ var AST_Debugger = DEFNODE("Debugger", null, {
$documentation: "Represents a debugger statement",
}, AST_Statement);
var AST_Directive = DEFNODE("Directive", "value scope quote", {
var AST_Directive = DEFNODE("Directive", "value quote", {
$documentation: "Represents a directive, like \"use strict\";",
$propdoc: {
value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
scope: "[AST_Scope/S] The scope that this directive affects",
quote: "[string] the original quote character"
},
}, AST_Statement);
@@ -303,10 +302,9 @@ var AST_With = DEFNODE("With", "expression", {
/* -----[ scope and functions ]----- */
var AST_Scope = DEFNODE("Scope", "directives variables functions uses_with uses_eval parent_scope enclosed cname", {
var AST_Scope = DEFNODE("Scope", "variables functions uses_with uses_eval parent_scope enclosed cname", {
$documentation: "Base class for all statements introducing a lexical scope",
$propdoc: {
directives: "[string*/S] an array of directives declared in this scope",
variables: "[Object/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
functions: "[Object/S] like `variables`, but only lists function declarations",
uses_with: "[boolean/S] tells whether this scope uses the `with` statement",

10
lib/compress.js
View File

@@ -875,7 +875,7 @@ merge(Compressor.prototype, {
}
}
function has_overlapping_symbol(fn, arg) {
function has_overlapping_symbol(fn, arg, fn_strict) {
var found = false, scan_this = !(fn instanceof AST_Arrow);
arg.walk(new TreeWalker(function(node, descend) {
if (found) return true;
@@ -886,7 +886,7 @@ merge(Compressor.prototype, {
}
return found = true;
}
if (scan_this && node instanceof AST_This) {
if ((fn_strict || scan_this) && node instanceof AST_This) {
return found = true;
}
if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
@@ -911,6 +911,8 @@ merge(Compressor.prototype, {
&& all(iife.args, function(arg) {
return !(arg instanceof AST_Expansion);
})) {
var fn_strict = compressor.has_directive("use strict");
if (fn_strict && fn.body.indexOf(fn_strict) < 0) fn_strict = false;
var names = Object.create(null);
for (var i = fn.argnames.length; --i >= 0;) {
var sym = fn.argnames[i];
@@ -919,7 +921,7 @@ merge(Compressor.prototype, {
if (sym instanceof AST_Expansion) {
var elements = iife.args.slice(i);
if (all(elements, function(arg) {
return !has_overlapping_symbol(fn, arg);
return !has_overlapping_symbol(fn, arg, fn_strict);
})) {
candidates.unshift(make_node(AST_VarDef, sym, {
name: sym.expression,
@@ -931,7 +933,7 @@ merge(Compressor.prototype, {
} else {
var arg = iife.args[i];
if (!arg) arg = make_node(AST_Undefined, sym).transform(compressor);
else if (has_overlapping_symbol(fn, arg)) arg = null;
else if (has_overlapping_symbol(fn, arg, fn_strict)) arg = null;
if (arg) candidates.unshift(make_node(AST_VarDef, sym, {
name: sym,
value: arg

16
lib/output.js
View File

@@ -506,13 +506,17 @@ function OutputStream(options) {
nodetype.DEFMETHOD("_codegen", generator);
};
var use_asm = false;
var in_directive = false;
var active_scope = null;
var use_asm = null;
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;
var self = this, generator = self._codegen;
if (self instanceof AST_Scope) {
active_scope = self;
}
else if (!use_asm && self instanceof AST_Directive && self.value == "use asm") {
use_asm = active_scope;
}
function doit() {
self.add_comments(stream);
@@ -526,8 +530,8 @@ function OutputStream(options) {
doit();
}
stream.pop_node();
if (self instanceof AST_Scope) {
use_asm = prev_use_asm;
if (self === use_asm) {
use_asm = null;
}
});
AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);