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BREAKING CHANGE: fix: detect the premature usage of @global variant #2624

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BREAKING CHANGE: fix: detect the premature usage of @global variant #2624

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7f26b2d
fix: global decorator causes compiler use incorrect flow
HerrCai0907 Jan 19, 2023
fc59853
add #2622 testcases
HerrCai0907 Jan 19, 2023
bc9bf8d
Revert "fix: global decorator causes compiler use incorrect flow"
HerrCai0907 Jan 19, 2023
9bdda14
throw a before_its_declaration error instead of compiling it
HerrCai0907 Jan 20, 2023
604eb07
handle @lazy and @global
HerrCai0907 Jan 20, 2023
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8 changes: 8 additions & 0 deletions src/compiler.ts
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Expand Up @@ -7339,6 +7339,14 @@ export class Compiler extends DiagnosticEmitter {
}
case ElementKind.Global: {
let global = <Global>target;
if (!global.hasDecorator(DecoratorFlags.Lazy) && global.hasDecorator(DecoratorFlags.Global) && !global.is(CommonFlags.Compiled)) {
this.error(
DiagnosticCode.Variable_0_used_before_its_declaration,
expression.range,
global.internalName
);
return module.unreachable();
}
Comment on lines +7342 to +7349
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Does this cover all possible cases? For example, if the global is not read (a = t1), but assigned (t1 = something), it looks like this branch alone would not suffice.

if (!this.compileGlobal(global)) { // reports; not yet compiled if a static field
return module.unreachable();
}
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6 changes: 6 additions & 0 deletions tests/compiler/issues/2622/2622-1.json
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@@ -0,0 +1,6 @@
{
"asc_flags": [],
"stderr": [
"TS2448: Variable 'issues/2622/node_modules_1/t1' used before its declaration."
]
}
3 changes: 3 additions & 0 deletions tests/compiler/issues/2622/2622-1.ts
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@@ -0,0 +1,3 @@
let a = t1;

import {} from "./node_modules_1";