match self.generic_param_list() {
Some(it) => it,
None => {
- let position = Position::after(self.name().unwrap().syntax);
+ let position = if let Some(name) = self.name() {
+ Position::after(name.syntax)
+ } else if let Some(fn_token) = self.fn_token() {
+ Position::after(fn_token)
+ } else if let Some(param_list) = self.param_list() {
+ Position::before(param_list.syntax)
+ } else {
+ Position::last_child_of(self.syntax())
+ };
create_generic_param_list(position)
}
}
match self.generic_param_list() {
Some(it) => it,
None => {
- let position = Position::after(self.impl_token().unwrap());
+ let position = if let Some(imp_token) = self.impl_token() {
+ Position::after(imp_token)
+ } else {
+ Position::last_child_of(self.syntax())
+ };
create_generic_param_list(position)
}
}
impl GenericParamsOwnerEdit for ast::Trait {
fn get_or_create_generic_param_list(&self) -> ast::GenericParamList {
- todo!()
+ match self.generic_param_list() {
+ Some(it) => it,
+ None => {
+ let position = if let Some(name) = self.name() {
+ Position::after(name.syntax)
+ } else if let Some(trait_token) = self.trait_token() {
+ Position::after(trait_token)
+ } else {
+ Position::last_child_of(self.syntax())
+ };
+ create_generic_param_list(position)
+ }
+ }
}
fn get_or_create_where_clause(&self) -> WhereClause {
impl GenericParamsOwnerEdit for ast::Struct {
fn get_or_create_generic_param_list(&self) -> ast::GenericParamList {
- todo!()
+ match self.generic_param_list() {
+ Some(it) => it,
+ None => {
+ let position = if let Some(name) = self.name() {
+ Position::after(name.syntax)
+ } else if let Some(struct_token) = self.struct_token() {
+ Position::after(struct_token)
+ } else {
+ Position::last_child_of(self.syntax())
+ };
+ create_generic_param_list(position)
+ }
+ }
}
fn get_or_create_where_clause(&self) -> WhereClause {
impl GenericParamsOwnerEdit for ast::Enum {
fn get_or_create_generic_param_list(&self) -> ast::GenericParamList {
- todo!()
+ match self.generic_param_list() {
+ Some(it) => it,
+ None => {
+ let position = if let Some(name) = self.name() {
+ Position::after(name.syntax)
+ } else if let Some(enum_token) = self.enum_token() {
+ Position::after(enum_token)
+ } else {
+ Position::last_child_of(self.syntax())
+ };
+ create_generic_param_list(position)
+ }
+ }
}
fn get_or_create_where_clause(&self) -> WhereClause {
ted::remove(self.syntax())
}
}
+
+#[cfg(test)]
+mod tests {
+ use std::fmt;
+
+ use crate::SourceFile;
+
+ use super::*;
+
+ fn ast_mut_from_text<N: AstNode>(text: &str) -> N {
+ let parse = SourceFile::parse(text);
+ parse.tree().syntax().descendants().find_map(N::cast).unwrap().clone_for_update()
+ }
+
+ #[test]
+ fn test_create_generic_param_list() {
+ fn check_create_gpl<N: GenericParamsOwnerEdit + fmt::Display>(before: &str, after: &str) {
+ let gpl_owner = ast_mut_from_text::<N>(before);
+ gpl_owner.get_or_create_generic_param_list();
+ assert_eq!(gpl_owner.to_string(), after);
+ }
+
+ check_create_gpl::<ast::Fn>("fn foo", "fn foo<>");
+ check_create_gpl::<ast::Fn>("fn foo() {}", "fn foo<>() {}");
+
+ check_create_gpl::<ast::Impl>("impl", "impl<>");
+ check_create_gpl::<ast::Impl>("impl Struct {}", "impl<> Struct {}");
+ check_create_gpl::<ast::Impl>("impl Trait for Struct {}", "impl<> Trait for Struct {}");
+
+ check_create_gpl::<ast::Trait>("trait Trait<>", "trait Trait<>");
+ check_create_gpl::<ast::Trait>("trait Trait<> {}", "trait Trait<> {}");
+
+ check_create_gpl::<ast::Struct>("struct A", "struct A<>");
+ check_create_gpl::<ast::Struct>("struct A;", "struct A<>;");
+ check_create_gpl::<ast::Struct>("struct A();", "struct A<>();");
+ check_create_gpl::<ast::Struct>("struct A {}", "struct A<> {}");
+
+ check_create_gpl::<ast::Enum>("enum E", "enum E<>");
+ check_create_gpl::<ast::Enum>("enum E {", "enum E<> {");
+ }
+}