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fix(es/minifier): Fix analysis of nested function-like properties (#5963)

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**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/5950.
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Donny/강동윤 2022-09-27 17:38:14 +09:00 committed by GitHub
parent cf474a3eac
commit 0fb2c1d5a5
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3 changed files with 146 additions and 0 deletions
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69
crates/swc/tests/exec/issues-5xxx/5950/1/.swcrc Normal file
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@ -0,0 +1,69 @@
{
"jsc": {
"target": "es5",
"minify": {
"compress": {
"arguments": false,
"arrows": true,
"booleans": true,
"booleans_as_integers": false,
"collapse_vars": true,
"comparisons": true,
"computed_props": true,
"conditionals": true,
"dead_code": true,
"directives": true,
"drop_console": false,
"drop_debugger": true,
"evaluate": true,
"expression": false,
"hoist_funs": false,
"hoist_props": true,
"hoist_vars": false,
"if_return": true,
"join_vars": true,
"keep_classnames": false,
"keep_fargs": true,
"keep_fnames": false,
"keep_infinity": false,
"loops": true,
"negate_iife": true,
"properties": true,
"reduce_funcs": false,
"reduce_vars": false,
"side_effects": true,
"switches": true,
"typeofs": true,
"unsafe": false,
"unsafe_arrows": false,
"unsafe_comps": false,
"unsafe_Function": false,
"unsafe_math": false,
"unsafe_symbols": false,
"unsafe_methods": false,
"unsafe_proto": false,
"unsafe_regexp": false,
"unsafe_undefined": false,
"unused": true,
"const_to_let": true,
"pristine_globals": true
},
"mangle": {
"toplevel": false,
"keep_classnames": false,
"keep_fnames": false,
"keep_private_props": false,
"ie8": false,
"safari10": false
}
}
},
"module": {
"type": "es6"
},
"minify": true,
"isModule": true,
"env": {
"targets": ""
}
}

14
crates/swc/tests/exec/issues-5xxx/5950/1/exec.js Normal file
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@ -0,0 +1,14 @@
class Test {
constructor(config) {
const that = this;
this.config = config;
this.options = {
get config() {
return that.config;
},
};
}
}
const instance = new Test(42);
console.log(instance.options.config); // should log 42

63
crates/swc_ecma_minifier/src/analyzer/mod.rs
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@ -1143,6 +1143,69 @@ where
});
}
#[cfg_attr(feature = "debug", tracing::instrument(skip(self, n)))]
fn visit_method_prop(&mut self, n: &MethodProp) {
n.function.decorators.visit_with(self);
self.with_child(n.function.span.ctxt, ScopeKind::Fn, |a| {
n.key.visit_with(a);
{
let ctx = Ctx {
in_pat_of_param: true,
..a.ctx
};
n.function.params.visit_with(&mut *a.with_ctx(ctx));
}
n.function.visit_with(a);
});
}
#[cfg_attr(feature = "debug", tracing::instrument(skip(self, n)))]
fn visit_getter_prop(&mut self, n: &GetterProp) {
self.with_child(n.span.ctxt, ScopeKind::Fn, |a| {
n.key.visit_with(a);
n.body.visit_with(a);
});
}
#[cfg_attr(feature = "debug", tracing::instrument(skip(self, n)))]
fn visit_class_method(&mut self, n: &ClassMethod) {
n.function.decorators.visit_with(self);
self.with_child(n.function.span.ctxt, ScopeKind::Fn, |a| {
n.key.visit_with(a);
{
let ctx = Ctx {
in_pat_of_param: true,
..a.ctx
};
n.function.params.visit_with(&mut *a.with_ctx(ctx));
}
n.function.visit_with(a);
});
}
#[cfg_attr(feature = "debug", tracing::instrument(skip(self, n)))]
fn visit_private_method(&mut self, n: &PrivateMethod) {
n.function.decorators.visit_with(self);
self.with_child(n.function.span.ctxt, ScopeKind::Fn, |a| {
n.key.visit_with(a);
{
let ctx = Ctx {
in_pat_of_param: true,
..a.ctx
};
n.function.params.visit_with(&mut *a.with_ctx(ctx));
}
n.function.visit_with(a);
});
}
#[cfg_attr(feature = "debug", tracing::instrument(skip(self, n)))]
fn visit_stmt(&mut self, n: &Stmt) {
let ctx = Ctx {