close #44

Convert x.toString() to ""+x instead of x+""

In some places this can save one byte in whitespace, e.g. after return.
Example:

function f(arg...

close #40

close #36, #38

for(...; x; ...) if (y) break; → for(...; x&&!y; ...);

similarly for `while` and some combi...

we do need parens here: `new (foo.bar().baz)`, but not here: `new foo.bar.baz`

AST_Accessor will represent the function for a setter or getter. Since they
are not mangleable,...

refs #35

fix #35

fix #34

(for more fair comparison to Closure compiler)

(since the source-map module no longer uses require.js)

refs #9

for `==` or `!=` against a constant, prefer to display the constant first.
should help a bit aft...

close #28

to mitigate the `__proto__` issue

related to #30

#kendo

since it has the potential to break code, let's keep it disabled by default

only try negating the expression if the operator is `!`

#kendo

(opera can't parse it)

close #25

close #24

(it was assumed that the first `return` always contains a value)

close #22

ref #9, close #20

Allow to specify sourceRoot in minify

function f(x, y) {
var g = function() { return h() };
var h = function() { r...

code, instead of file names, as first argument).

close #17

(unlikely to help for hand-written code)

to support passing commas in strings in for example:

uglifyjs2 -cd TEST="'a,b'" <<EOF
c...

we need to mangle names from outermost to innermost scope; mangling names
from inner scopes befo...

pass `false` to separate statements with newlines instead of semicolons

also add test for "drop_unused" (the last one fails for now)

the following code in benchmark.js triggered the issue:

support.decompilation = Function(
...

is_digit takes a char code now, not a string

operations are destructive anyway, so there's no point to clone the nodes in
the transformer. s...

so that the optimization that drops the name if unused doesn't apply.
close #12

string is keyword, reserved etc.

speeds up the parser a bit, though not spectacular.. still far ...

- use prototype-less objects where feasible (minor speed improvement)
- get rid of HOP

close #11

- use MAP.splice instead of a BlockStatement to inject code (avoids some
warnings in the linte...

hopefully we can make the AST documentation self-generating

displays a rather cruel description of the AST classes, derived
directly from the node definitions.

Fix crash in minify function

When inSourceMap is omitted fs.readFile throws exception. Fixed version
calls fs.readFile only w...

(refs #7)

map from, so just use "?". and in any case, don't fail hard when addMapping throws.