Files
UglifyJS/test/compress/concat-strings.js
alexlamsl 6b3c49e458 improve string concatenation
shuffle associative operations to minimise parentheses and aid other uglification efforts

closes #1454
2017-02-21 13:29:57 +08:00

167 lines
4.2 KiB
JavaScript

concat_1: {
options = {
evaluate: true
};
input: {
var a = "foo" + "bar" + x() + "moo" + "foo" + y() + "x" + "y" + "z" + q();
var b = "foo" + 1 + x() + 2 + "boo";
var c = 1 + x() + 2 + "boo";
// this CAN'T safely be shortened to 1 + x() + "5boo"
var d = 1 + x() + 2 + 3 + "boo";
var e = 1 + x() + 2 + "X" + 3 + "boo";
// be careful with concatentation with "\0" with octal-looking strings.
var f = "\0" + 360 + "\0" + 8 + "\0";
}
expect: {
var a = "foobar" + x() + "moofoo" + y() + "xyz" + q();
var b = "foo1" + x() + "2boo";
var c = 1 + x() + 2 + "boo";
var d = 1 + x() + 2 + 3 + "boo";
var e = 1 + x() + 2 + "X3boo";
var f = "\x00360\08\0";
}
}
concat_2: {
options = {};
input: {
console.log(
1 + (2 + 3),
1 + (2 + "3"),
1 + ("2" + 3),
1 + ("2" + "3"),
"1" + (2 + 3),
"1" + (2 + "3"),
"1" + ("2" + 3),
"1" + ("2" + "3")
);
}
expect: {
console.log(
1 + (2 + 3),
1 + (2 + "3"),
1 + "2" + 3,
1 + "2" + "3",
"1" + (2 + 3),
"1" + 2 + "3",
"1" + "2" + 3,
"1" + "2" + "3"
);
}
}
concat_3: {
options = {};
input: {
console.log(
1 + 2 + (3 + 4 + 5),
1 + 2 + (3 + 4 + "5"),
1 + 2 + (3 + "4" + 5),
1 + 2 + (3 + "4" + "5"),
1 + 2 + ("3" + 4 + 5),
1 + 2 + ("3" + 4 + "5"),
1 + 2 + ("3" + "4" + 5),
1 + 2 + ("3" + "4" + "5")
);
}
expect: {
console.log(
1 + 2 + (3 + 4 + 5),
1 + 2 + (3 + 4 + "5"),
1 + 2 + (3 + "4") + 5,
1 + 2 + (3 + "4") + "5",
1 + 2 + "3" + 4 + 5,
1 + 2 + "3" + 4 + "5",
1 + 2 + "3" + "4" + 5,
1 + 2 + "3" + "4" + "5"
);
}
}
concat_4: {
options = {};
input: {
console.log(
1 + "2" + (3 + 4 + 5),
1 + "2" + (3 + 4 + "5"),
1 + "2" + (3 + "4" + 5),
1 + "2" + (3 + "4" + "5"),
1 + "2" + ("3" + 4 + 5),
1 + "2" + ("3" + 4 + "5"),
1 + "2" + ("3" + "4" + 5),
1 + "2" + ("3" + "4" + "5")
);
}
expect: {
console.log(
1 + "2" + (3 + 4 + 5),
1 + "2" + (3 + 4) + "5",
1 + "2" + 3 + "4" + 5,
1 + "2" + 3 + "4" + "5",
1 + "2" + "3" + 4 + 5,
1 + "2" + "3" + 4 + "5",
1 + "2" + "3" + "4" + 5,
1 + "2" + "3" + "4" + "5"
);
}
}
concat_5: {
options = {};
input: {
console.log(
"1" + 2 + (3 + 4 + 5),
"1" + 2 + (3 + 4 + "5"),
"1" + 2 + (3 + "4" + 5),
"1" + 2 + (3 + "4" + "5"),
"1" + 2 + ("3" + 4 + 5),
"1" + 2 + ("3" + 4 + "5"),
"1" + 2 + ("3" + "4" + 5),
"1" + 2 + ("3" + "4" + "5")
);
}
expect: {
console.log(
"1" + 2 + (3 + 4 + 5),
"1" + 2 + (3 + 4) + "5",
"1" + 2 + 3 + "4" + 5,
"1" + 2 + 3 + "4" + "5",
"1" + 2 + "3" + 4 + 5,
"1" + 2 + "3" + 4 + "5",
"1" + 2 + "3" + "4" + 5,
"1" + 2 + "3" + "4" + "5"
);
}
}
concat_6: {
options = {};
input: {
console.log(
"1" + "2" + (3 + 4 + 5),
"1" + "2" + (3 + 4 + "5"),
"1" + "2" + (3 + "4" + 5),
"1" + "2" + (3 + "4" + "5"),
"1" + "2" + ("3" + 4 + 5),
"1" + "2" + ("3" + 4 + "5"),
"1" + "2" + ("3" + "4" + 5),
"1" + "2" + ("3" + "4" + "5")
);
}
expect: {
console.log(
"1" + "2" + (3 + 4 + 5),
"1" + "2" + (3 + 4) + "5",
"1" + "2" + 3 + "4" + 5,
"1" + "2" + 3 + "4" + "5",
"1" + "2" + "3" + 4 + 5,
"1" + "2" + "3" + 4 + "5",
"1" + "2" + "3" + "4" + 5,
"1" + "2" + "3" + "4" + "5"
);
}
}