TypeScript: JSDoc tooltips are shared between types and values, but not functions

TS Template added by @mjbvz

TypeScript Version: 4.2.4

Search Terms

• quickinfo
• jsdoc

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Issue Type: Bug

Steps to reproduce

• Create a TypeScript file.
• Create a type alias with some name, and write a JSDoc comment for it.
• For types and functions:
  • Create a function with the same name, write a different JSDoc comment.
  • Hover over the type name. You will see the function’s comment, followed by the type’s comment.
  • Hover over the function. You will only see the function’s comment.
• For types and values:
  • Create a value identifier with the same name, write a different JSDoc comment.
  • Hover over the type name. You will see the type’s comment, followed by the value’s comment.
  • Hover over the value identifier. You will see the type’s comment, followed by the value’s comment.

Reference file

/** A */
type X = null
/** B */
let X = null
/** C */
type Y = null
/** D */
function Y() {}

Screenshots

System and version info

VS Code version: Code - Insiders 1.56.0-insider (0123d26aaa393bccf99f31f1eac07df6c9e218ce, 2021-04-29T05:12:38.091Z)
OS version: Linux x64 5.11.0-7614-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz (8 x 2300)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: enabled_on rasterization: disabled_software skia_renderer: enabled_on video_decode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	2, 2, 2
Memory (System)	7.64GB (0.18GB free)
Process Argv	--no-sandbox --unity-launch --crash-reporter-id dbbd25fe-3f4e-426a-9c89-45e060834124
Screen Reader	no
VM	0%
DESKTOP_SESSION	pop
XDG_CURRENT_DESKTOP	Unity
XDG_SESSION_DESKTOP	pop
XDG_SESSION_TYPE	x11

Extensions: none

Start by reproducing the reference TypeScript file and compare quickinfo results for the type/value pair with the type/function pair. Trace the quickinfo and JSDoc handling involved in those hovers, then add regression coverage for the expected tooltip comments and verify that each declaration shows the appropriate documentation.