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exclude mangling of special property names (#1779)

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- `null`
- `true`
- `false`
- numeric literals
This commit is contained in:
Alex Lam S.L
2017-04-04 03:50:19 +08:00
committed by GitHub
parent 48b3fe9952
commit 951770fc68
2 changed files with 91 additions and 39 deletions
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5
lib/propmangle.js
View File

@@ -46,6 +46,9 @@
function find_builtins() {
// NaN will be included due to Number.NaN
var a = [
"null",
"true",
"false",
"Infinity",
"-Infinity",
"undefined",
@@ -159,7 +162,7 @@ function mangle_properties(ast, options) {
if (options.only_cache) {
return cache.props.has(name);
}
if (/^[0-9.]+$/.test(name)) return false;
if (/^-?[0-9]+(\.[0-9]+)?(e[+-][0-9]+)?$/.test(name)) return false;
return true;
}

125
test/compress/issue-1770.js
View File

@@ -6,7 +6,7 @@ mangle_props: {
NaN: 2,
Infinity: 3,
"-Infinity": 4,
"-0": 5,
null: 5,
};
console.log(
obj[void 0],
@@ -21,9 +21,8 @@ mangle_props: {
obj[-1/0],
obj[-Infinity],
obj["-Infinity"],
obj[-0],
obj[-""],
obj["-0"]
obj[null],
obj["null"]
);
}
expect: {
@@ -32,7 +31,7 @@ mangle_props: {
NaN: 2,
Infinity: 3,
"-Infinity": 4,
a: 5,
null: 5,
};
console.log(
obj[void 0],
@@ -47,12 +46,62 @@ mangle_props: {
obj[-1/0],
obj[-1/0],
obj["-Infinity"],
obj[-0],
obj[-""],
obj["a"]
obj[null],
obj["null"]
);
}
expect_stdout: "1 1 1 2 2 2 3 3 3 4 4 4 undefined undefined 5"
expect_stdout: "1 1 1 2 2 2 3 3 3 4 4 4 5 5"
}
numeric_literal: {
beautify = {
beautify: true,
}
mangle_props = {}
input: {
var obj = {
0: 0,
"-0": 1,
42: 2,
"42": 3,
0x25: 4,
"0x25": 5,
1E42: 6,
"1E42": 7,
"1e+42": 8,
};
console.log(obj[-0], obj[-""], obj["-0"]);
console.log(obj[42], obj["42"]);
console.log(obj[0x25], obj["0x25"], obj[37], obj["37"]);
console.log(obj[1E42], obj["1E42"], obj["1e+42"]);
}
expect_exact: [
'var obj = {',
' 0: 0,',
' "-0": 1,',
' 42: 2,',
' "42": 3,',
' 37: 4,',
' a: 5,',
' 1e42: 6,',
' b: 7,',
' "1e+42": 8',
'};',
'',
'console.log(obj[-0], obj[-""], obj["-0"]);',
'',
'console.log(obj[42], obj["42"]);',
'',
'console.log(obj[37], obj["a"], obj[37], obj["37"]);',
'',
'console.log(obj[1e42], obj["b"], obj["1e+42"]);',
]
expect_stdout: [
"0 0 1",
"3 3",
"4 5 4 4",
"8 7 8",
]
}
identifier: {
@@ -156,35 +205,35 @@ identifier: {
D: 30,
F: 31,
G: 32,
H: 33,
I: 34,
J: 35,
K: 36,
L: 37,
M: 38,
N: 39,
O: 40,
P: 41,
Q: 42,
R: 43,
S: 44,
T: 45,
U: 46,
V: 47,
W: 48,
X: 49,
Y: 50,
Z: 51,
$: 52,
_: 53,
aa: 54,
ba: 55,
ca: 56,
da: 57,
ea: 58,
fa: 59,
ga: 60,
ha: 61
false: 33,
null: 34,
true: 35,
H: 36,
I: 37,
J: 38,
K: 39,
L: 40,
M: 41,
N: 42,
O: 43,
P: 44,
Q: 45,
R: 46,
S: 47,
T: 48,
U: 49,
V: 50,
W: 51,
X: 52,
Y: 53,
Z: 54,
$: 55,
_: 56,
aa: 57,
ba: 58,
ca: 59,
da: 60,
ea: 61,
};
}
}