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//! Functionality for generating trivial constructors
use hir::StructKind;
use syntax::ast;
/// given a type return the trivial constructor (if one exists)
pub fn use_trivial_constructor(
db: &crate::RootDatabase,
path: ast::Path,
ty: &hir::Type,
) -> Option<ast::Expr> {
match ty.as_adt() {
Some(hir::Adt::Enum(x)) => {
if let &[variant] = &*x.variants(db) {
if variant.kind(db) == hir::StructKind::Unit {
let path = ast::make::path_qualified(
path,
syntax::ast::make::path_segment(ast::make::name_ref(
&variant.name(db).to_smol_str(),
)),
);
return Some(syntax::ast::make::expr_path(path));
}
}
}
Some(hir::Adt::Struct(x)) if x.kind(db) == StructKind::Unit => {
return Some(syntax::ast::make::expr_path(path));
}
_ => {}
}
None
}
|
