TypeScript's const modifier on type parameteres breaks syntax highlighting in `.tsx` files

[gustavopch]

Type: Bug

• Create a file repro.ts.
• Paste the code below.
• See that the syntax highlighting works fine.
• Change the extension to .tsx.
• See that the syntax highlighting is broken.

export const always = <const T,>(value: T) => {
  return () => value
}

repro.ts:

repro.tsx:

Context: https://devblogs.microsoft.com/typescript/announcing-typescript-5-0/#const-type-parameters

VS Code version: Code - Insiders 1.78.0-insider (Universal) (e410e7c66e7ce5c6bc31f73150d66857804a0ee9, 2023-04-28T12:31:32.032Z) OS version: Darwin arm64 22.3.0 Modes: Sandboxed: Yes

System Info

|Item|Value| |---|---| |CPUs|Apple M1 (8 x 24)| |GPU Status|2d_canvas: enabled
canvas_oop_rasterization: disabled_off
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
metal: disabled_off
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled| |Load (avg)|3, 3, 3| |Memory (System)|8.00GB (0.13GB free)| |Process Argv|| |Screen Reader|no| |VM|0%|

Extensions: none

A/B Experiments

``` vsliv695:30137379 vsins829:30139715 vsliv368cf:30146710 vsreu685:30147344 python383:30185418 vspor879:30202332 vspor708:30202333 vspor363:30204092 vslsvsres303:30308271 pythontb:30258533 vsc_aacf:30263846 pythonptprofiler:30281269 vshan820:30294714 pythondataviewer:30285072 vscod805:30301674 bridge0708:30335490 bridge0723:30353136 cmake_vspar411:30581797 vsaa593:30376534 pythonvs932:30404738 cppdebug:30492333 vsclangdf:30492506 c4g48928:30535728 dsvsc012cf:30540253 pynewext54:30618038 pylantcb52:30590116 nodejswelcome1:30587009 pyind779:30611226 pythonsymbol12:30651887 2i9eh265:30646982 6233i204:30725950 azdwalk:30721579 pythonms35:30671666 03d35959:30680466 24365598:30687740 pythonfmttext:30716741 pythoncmvfstr:30726892 fixshowwlkth:30724385 showsbindicator:30724477 pythongtdpath:30726887 ```