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compress arguments[index] (#2967)

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- always replace with existing parameter
- only introduce new parameter if `keep_fargs` is disabled
This commit is contained in:
Alex Lam S.L
2018-03-02 11:22:09 +08:00
committed by GitHub
parent 38f2b4579f
commit a75a046abb
4 changed files with 155 additions and 7 deletions
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119
test/compress/arguments.js Normal file
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@@ -0,0 +1,119 @@
replace_index: {
options = {
arguments: true,
evaluate: true,
properties: true,
}
input: {
console.log(arguments && arguments[0]);
(function() {
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
(function(a, b) {
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
(function(arguments) {
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
(function() {
var arguments;
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
}
expect: {
console.log(arguments && arguments[0]);
(function() {
console.log(arguments[1], arguments[1], arguments.foo);
})("bar", 42);
(function(a, b) {
console.log(b, b, arguments.foo);
})("bar", 42);
(function(arguments) {
console.log(arguments[1], arguments[1], arguments.foo);
})("bar", 42);
(function() {
var arguments;
console.log(arguments[1], arguments[1], arguments.foo);
})("bar", 42);
}
expect_stdout: [
"undefined",
"42 42 undefined",
"42 42 undefined",
"a a undefined",
"42 42 undefined",
]
}
replace_index_keep_fargs: {
options = {
arguments: true,
evaluate: true,
keep_fargs: false,
properties: true,
}
input: {
console.log(arguments && arguments[0]);
(function() {
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
(function(a, b) {
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
(function(arguments) {
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
(function() {
var arguments;
console.log(arguments[1], arguments["1"], arguments["foo"]);
})("bar", 42);
}
expect: {
console.log(arguments && arguments[0]);
(function(argument_0, argument_1) {
console.log(argument_1, argument_1, arguments.foo);
})("bar", 42);
(function(a, b) {
console.log(b, b, arguments.foo);
})("bar", 42);
(function(arguments) {
console.log(arguments[1], arguments[1], arguments.foo);
})("bar", 42);
(function() {
var arguments;
console.log(arguments[1], arguments[1], arguments.foo);
})("bar", 42);
}
expect_stdout: [
"undefined",
"42 42 undefined",
"42 42 undefined",
"a a undefined",
"42 42 undefined",
]
}
modified: {
options = {
arguments: true,
}
input: {
(function(a, b) {
var c = arguments[0];
var d = arguments[1];
a = "foo";
b++;
console.log(a, b, c, d, arguments[0], arguments[1]);
})("bar", 42);
}
expect: {
(function(a, b) {
var c = a;
var d = b;
a = "foo";
b++;
console.log(a, b, c, d, a, b);
})("bar", 42);
}
expect_stdout: "foo 43 bar 42 foo 43"
}