pkg go/ast, type Package //deprecated #52463
pkg go/ast, type Scope //deprecated #52463
pkg go/types, func NewAlias(*TypeName, Type) *Alias #63223
pkg go/types, func Unalias(Type) Type #63223
pkg go/types, method (*Alias) Obj() *TypeName #63223
pkg go/types, method (*Alias) String() string #63223
pkg go/types, method (*Alias) Underlying() Type #63223
pkg go/types, method (*Info) PkgNameOf(*ast.ImportSpec) *PkgName #62037

			s = "<-chan "
		case types.SendRecv:
			s = "chan "
		default:
			panic("unreachable")
		}
		buf.WriteString(s)
		w.writeType(buf, typ.Elem())

	case *types.Alias:
		w.writeType(buf, types.Unalias(typ))

	case *types.Named:
		obj := typ.Obj()
		pkg := obj.Pkg()
		if pkg != nil && pkg != w.current.Package {
			buf.WriteString(pkg.Name())
			buf.WriteByte('.')
		}

# Alias


@app.get("/required-list-alias")
async def read_required_list_alias(p: Annotated[list[str], Header(alias="p_alias")]):
    return {"p": p}


class HeaderModelRequiredListAlias(BaseModel):
    p: list[str] = Field(alias="p_alias")


@app.get("/model-required-list-alias")
async def read_model_required_list_alias(

    }


@pytest.mark.parametrize(
    "path",
    [
        "/list-bytes-alias-and-validation-alias",
        "/list-uploadfile-alias-and-validation-alias",
    ],
)
def test_list_alias_and_validation_alias_by_alias(path: str):
    client = TestClient(app)
    response = client.post(path, files=[("p_alias", b"hello"), ("p_alias", b"world")])
    assert response.status_code == 422, response.text

# Alias


@app.post("/required-alias", operation_id="required_alias")
async def read_required_alias(p: Annotated[str, Form(alias="p_alias")]):
    return {"p": p}


class FormModelRequiredAlias(BaseModel):
    p: str = Field(alias="p_alias")


@app.post("/model-required-alias", operation_id="model_required_alias")

# Alias and validation alias


@app.get("/required-alias-and-validation-alias")
def read_required_alias_and_validation_alias(
    p: Annotated[str, Query(alias="p_alias", validation_alias="p_val_alias")],
):
    return {"p": p}


class QueryModelRequiredAliasAndValidationAlias(BaseModel):
    p: str = Field(alias="p_alias", validation_alias="p_val_alias")

# Alias and validation alias


@app.get("/required-alias-and-validation-alias")
def read_required_alias_and_validation_alias(
    p: Annotated[str, Header(alias="p_alias", validation_alias="p_val_alias")],
):
    return {"p": p}


class HeaderModelRequiredAliasAndValidationAlias(BaseModel):
    p: str = Field(alias="p_alias", validation_alias="p_val_alias")

# Alias


@app.post("/required-alias", operation_id="required_alias")
async def read_required_alias(
    p: Annotated[str, Body(embed=True, alias="p_alias")],
):
    return {"p": p}


class BodyModelRequiredAlias(BaseModel):
    p: str = Field(alias="p_alias")


@app.post("/model-required-alias", operation_id="model_required_alias")

# Alias


@app.get("/optional-list-alias")
async def read_optional_list_alias(
    p: Annotated[Optional[list[str]], Query(alias="p_alias")] = None,
):
    return {"p": p}


class QueryModelOptionalListAlias(BaseModel):
    p: Optional[list[str]] = Field(None, alias="p_alias")


@app.get("/model-optional-list-alias")
async def read_model_optional_list_alias(

):
    return {"p": p}


@pytest.mark.parametrize(
    ("path", "expected_name", "expected_title"),
    [
        pytest.param("/required-str/{p}", "p", "P", id="required-str"),
        pytest.param(
            "/required-alias/{p_alias}", "p_alias", "P Alias", id="required-alias"
        ),
        pytest.param(
            "/required-validation-alias/{p_val_alias}",