Function body_assigns_to 

pub(crate) fn body_assigns_to(body: &str, name: &str) -> bool

Whether body (a { ... } WGSL block as text) contains an assignment to a bare identifier matching name. Recognises plain =, compound assignments (+=, -=, *=, /=, %=) and post-increment / decrement (++ / --); excludes the comparison operators ==, !=, <=, >=. Skips matches inside //-style line comments because the textual scan would otherwise see a commented-out assignment as a real write.