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Revert "remove support for const (#1910)"

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This reverts commit c391576d52.
This commit is contained in:
alexlamsl
2017-05-15 18:38:16 +08:00
parent ff526be61d
commit cd6e849555
20 changed files with 591 additions and 36 deletions
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125
test/compress/dead-code.js
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@@ -90,6 +90,131 @@ dead_code_constant_boolean_should_warn_more: {
expect_stdout: true
}
dead_code_const_declaration: {
options = {
dead_code : true,
loops : true,
booleans : true,
conditionals : true,
evaluate : true,
reduce_vars : true,
};
input: {
var unused;
const CONST_FOO = false;
if (CONST_FOO) {
console.log("unreachable");
var moo;
function bar() {}
}
}
expect: {
var unused;
const CONST_FOO = !1;
var moo;
function bar() {}
}
expect_stdout: true
}
dead_code_const_annotation: {
options = {
dead_code : true,
loops : true,
booleans : true,
conditionals : true,
evaluate : true,
reduce_vars : true,
toplevel : true,
};
input: {
var unused;
/** @const */ var CONST_FOO_ANN = false;
if (CONST_FOO_ANN) {
console.log("unreachable");
var moo;
function bar() {}
}
}
expect: {
var unused;
var CONST_FOO_ANN = !1;
var moo;
function bar() {}
}
expect_stdout: true
}
dead_code_const_annotation_regex: {
options = {
dead_code : true,
loops : true,
booleans : true,
conditionals : true,
evaluate : true
};
input: {
var unused;
// @constraint this shouldn't be a constant
var CONST_FOO_ANN = false;
if (CONST_FOO_ANN) {
console.log("reachable");
}
}
expect: {
var unused;
var CONST_FOO_ANN = !1;
CONST_FOO_ANN && console.log('reachable');
}
expect_stdout: true
}
dead_code_const_annotation_complex_scope: {
options = {
dead_code : true,
loops : true,
booleans : true,
conditionals : true,
evaluate : true,
reduce_vars : true,
toplevel : true,
};
input: {
var unused_var;
/** @const */ var test = 'test';
// @const
var CONST_FOO_ANN = false;
var unused_var_2;
if (CONST_FOO_ANN) {
console.log("unreachable");
var moo;
function bar() {}
}
if (test === 'test') {
var beef = 'good';
/** @const */ var meat = 'beef';
var pork = 'bad';
if (meat === 'pork') {
console.log('also unreachable');
} else if (pork === 'good') {
console.log('reached, not const');
}
}
}
expect: {
var unused_var;
var test = 'test';
var CONST_FOO_ANN = !1;
var unused_var_2;
var moo;
function bar() {}
var beef = 'good';
var meat = 'beef';
var pork = 'bad';
}
expect_stdout: true
}
try_catch_finally: {
options = {
conditionals: true,