Formatter fails to format files that contain `>>` from templated type definitions

[Alexander-L-Robert]

For something like

export type a<T> = T
export type b<T> = T
export type c = any

When formatting the line below:
export type myType = a<b<c> >
It gets formatted to this:
export type myType = a<b<c>>

Then whenever I try to format the file again I get an error:
[error] error: could not format from stdin: failed to format from stdin: error parsing:

• unexpected token >> (4:27 to 4:29), expected '>' to close generic type parameter list
• unexpected token >> (4:27 to 4:29), unexpected token, this needs to be a statement

[JohnnyMorganz]

What's happening here is >> is getting parsed as a Lua 5.3+ bitwise operator, which conflicts with Luau's type parameters list.

In StyLua 2.0+, the underlying parser was updated to support runtime syntax selection. This made >> tokenization take priority over the generic type list. StyLua by default enables all possible syntax modes at once to make it easier to get started immediately on codebases.

You can fix this by setting syntax = "Luau" in your stylua.toml file, to disable Lua 5.3 parsing

We should probably add a hint message to that error mentioning this too

[Alexander-L-Robert]

Thank you! This works perfectly now