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Finish GenericParamsOwnerEdit impls
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@ -23,7 +23,15 @@ impl GenericParamsOwnerEdit for ast::Fn {
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match self.generic_param_list() {
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Some(it) => it,
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None => {
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let position = Position::after(self.name().unwrap().syntax);
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let position = if let Some(name) = self.name() {
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Position::after(name.syntax)
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} else if let Some(fn_token) = self.fn_token() {
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Position::after(fn_token)
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} else if let Some(param_list) = self.param_list() {
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Position::before(param_list.syntax)
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} else {
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Position::last_child_of(self.syntax())
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};
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create_generic_param_list(position)
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}
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}
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@ -49,7 +57,11 @@ impl GenericParamsOwnerEdit for ast::Impl {
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match self.generic_param_list() {
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Some(it) => it,
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None => {
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let position = Position::after(self.impl_token().unwrap());
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let position = if let Some(imp_token) = self.impl_token() {
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Position::after(imp_token)
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} else {
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Position::last_child_of(self.syntax())
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};
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create_generic_param_list(position)
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}
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}
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@ -70,7 +82,19 @@ impl GenericParamsOwnerEdit for ast::Impl {
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impl GenericParamsOwnerEdit for ast::Trait {
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fn get_or_create_generic_param_list(&self) -> ast::GenericParamList {
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todo!()
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match self.generic_param_list() {
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Some(it) => it,
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None => {
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let position = if let Some(name) = self.name() {
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Position::after(name.syntax)
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} else if let Some(trait_token) = self.trait_token() {
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Position::after(trait_token)
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} else {
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Position::last_child_of(self.syntax())
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};
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create_generic_param_list(position)
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}
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}
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}
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fn get_or_create_where_clause(&self) -> WhereClause {
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@ -88,7 +112,19 @@ impl GenericParamsOwnerEdit for ast::Trait {
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impl GenericParamsOwnerEdit for ast::Struct {
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fn get_or_create_generic_param_list(&self) -> ast::GenericParamList {
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todo!()
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match self.generic_param_list() {
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Some(it) => it,
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None => {
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let position = if let Some(name) = self.name() {
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Position::after(name.syntax)
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} else if let Some(struct_token) = self.struct_token() {
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Position::after(struct_token)
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} else {
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Position::last_child_of(self.syntax())
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};
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create_generic_param_list(position)
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}
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}
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}
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fn get_or_create_where_clause(&self) -> WhereClause {
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@ -114,7 +150,19 @@ impl GenericParamsOwnerEdit for ast::Struct {
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impl GenericParamsOwnerEdit for ast::Enum {
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fn get_or_create_generic_param_list(&self) -> ast::GenericParamList {
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todo!()
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match self.generic_param_list() {
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Some(it) => it,
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None => {
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let position = if let Some(name) = self.name() {
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Position::after(name.syntax)
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} else if let Some(enum_token) = self.enum_token() {
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Position::after(enum_token)
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} else {
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Position::last_child_of(self.syntax())
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};
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create_generic_param_list(position)
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}
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}
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}
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fn get_or_create_where_clause(&self) -> WhereClause {
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@ -228,3 +276,44 @@ impl ast::Use {
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ted::remove(self.syntax())
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}
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}
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#[cfg(test)]
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mod tests {
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use std::fmt;
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use crate::SourceFile;
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use super::*;
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fn ast_mut_from_text<N: AstNode>(text: &str) -> N {
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let parse = SourceFile::parse(text);
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parse.tree().syntax().descendants().find_map(N::cast).unwrap().clone_for_update()
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}
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#[test]
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fn test_create_generic_param_list() {
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fn check_create_gpl<N: GenericParamsOwnerEdit + fmt::Display>(before: &str, after: &str) {
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let gpl_owner = ast_mut_from_text::<N>(before);
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gpl_owner.get_or_create_generic_param_list();
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assert_eq!(gpl_owner.to_string(), after);
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}
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check_create_gpl::<ast::Fn>("fn foo", "fn foo<>");
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check_create_gpl::<ast::Fn>("fn foo() {}", "fn foo<>() {}");
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check_create_gpl::<ast::Impl>("impl", "impl<>");
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check_create_gpl::<ast::Impl>("impl Struct {}", "impl<> Struct {}");
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check_create_gpl::<ast::Impl>("impl Trait for Struct {}", "impl<> Trait for Struct {}");
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check_create_gpl::<ast::Trait>("trait Trait<>", "trait Trait<>");
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check_create_gpl::<ast::Trait>("trait Trait<> {}", "trait Trait<> {}");
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check_create_gpl::<ast::Struct>("struct A", "struct A<>");
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check_create_gpl::<ast::Struct>("struct A;", "struct A<>;");
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check_create_gpl::<ast::Struct>("struct A();", "struct A<>();");
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check_create_gpl::<ast::Struct>("struct A {}", "struct A<> {}");
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check_create_gpl::<ast::Enum>("enum E", "enum E<>");
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check_create_gpl::<ast::Enum>("enum E {", "enum E<> {");
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}
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}
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