fix(mangler): allow using typescript keywords as variable names (#14315)

`as`, `any` should be allowed to use as a variable name.

Author: sapphi-red

Cargo.lock

@@ -27,6 +27,7 @@ oxc_data_structures = { workspace = true, features = ["inline_string"] }
 oxc_index = { workspace = true }
 oxc_semantic = { workspace = true }
 oxc_span = { workspace = true }
+oxc_syntax = { workspace = true }
 
 itertools = { workspace = true }
 rustc-hash = { workspace = true }

crates/oxc_mangler/Cargo.toml

@@ -421,7 +421,7 @@ impl<'t> Mangler<'t> {
                 count += 1;
                 // Do not mangle keywords and unresolved references
                 let n = name.as_str();
-                if !is_keyword(n)
+                if !oxc_syntax::keyword::is_reserved_keyword(n)
                     && !is_special_name(n)
                     && !root_unresolved_references.contains_key(n)
                     && !(root_bindings.contains_key(n)
@@ -605,14 +605,6 @@ impl<'t> SlotFrequency<'t> {
     }
 }
 
-#[rustfmt::skip]
-fn is_keyword(s: &str) -> bool {
-    matches!(s, "as" | "do" | "if" | "in" | "is" | "of" | "any" | "for" | "get"
-            | "let" | "new" | "out" | "set" | "try" | "var" | "case" | "else"
-            | "enum" | "from" | "meta" | "null" | "this" | "true" | "type"
-            | "void" | "with")
-}
-
 // Maximum length of string is 15 (`slot_4294967295` for `u32::MAX`).
 fn debug_name(n: u32) -> InlineString<15, u8> {
     // Using `format!` here allocates a string unnecessarily.

crates/oxc_mangler/src/lib.rs

@@ -11,17 +11,17 @@ Original   | minified   | minified   | gzip       | gzip       | Iterations | Fi
 
 544.10 kB  | 71.04 kB   | 72.48 kB   | 25.78 kB   | 26.20 kB   |          2 | lodash.js  
 
-555.77 kB  | 267.39 kB  | 270.13 kB  | 88.02 kB   | 90.80 kB   |          2 | d3.js      
+555.77 kB  | 267.39 kB  | 270.13 kB  | 88.01 kB   | 90.80 kB   |          2 | d3.js      
 
 1.01 MB    | 439.40 kB  | 458.89 kB  | 122.06 kB  | 126.71 kB  |          2 | bundle.min.js 
 
 1.25 MB    | 642.65 kB  | 646.76 kB  | 159.39 kB  | 163.73 kB  |          2 | three.js   
 
 2.14 MB    | 711.15 kB  | 724.14 kB  | 160.43 kB  | 181.07 kB  |          2 | victory.js 
 
-3.20 MB    | 1.00 MB    | 1.01 MB    | 322.53 kB  | 331.56 kB  |          3 | echarts.js 
+3.20 MB    | 1.00 MB    | 1.01 MB    | 322.59 kB  | 331.56 kB  |          3 | echarts.js 
 
 6.69 MB    | 2.22 MB    | 2.31 MB    | 458.41 kB  | 488.28 kB  |          4 | antd.js    
 
-10.95 MB   | 3.33 MB    | 3.49 MB    | 853.38 kB  | 915.50 kB  |          4 | typescript.js 
+10.95 MB   | 3.33 MB    | 3.49 MB    | 853.34 kB  | 915.50 kB  |          4 | typescript.js