Enum aws_sdk_ec2::model::Protocol

#[non_exhaustive]
pub enum Protocol {
    Tcp,
    Udp,
    Unknown(UnknownVariantValue),
}

When writing a match expression against Protocol, it is important to ensure your code is forward-compatible. That is, if a match arm handles a case for a feature that is supported by the service but has not been represented as an enum variant in a current version of SDK, your code should continue to work when you upgrade SDK to a future version in which the enum does include a variant for that feature.

Here is an example of how you can make a match expression forward-compatible:

# let protocol = unimplemented!();
match protocol {
    Protocol::Tcp => { /* ... */ },
    Protocol::Udp => { /* ... */ },
    other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
    _ => { /* ... */ },
}

The above code demonstrates that when protocol represents NewFeature, the execution path will lead to the second last match arm, even though the enum does not contain a variant Protocol::NewFeature in the current version of SDK. The reason is that the variable other, created by the @ operator, is bound to Protocol::Unknown(UnknownVariantValue("NewFeature".to_owned())) and calling as_str on it yields "NewFeature". This match expression is forward-compatible when executed with a newer version of SDK where the variant Protocol::NewFeature is defined. Specifically, when protocol represents NewFeature, the execution path will hit the second last match arm as before by virtue of calling as_str on Protocol::NewFeature also yielding "NewFeature".

Explicitly matching on the Unknown variant should be avoided for two reasons:

• The inner data UnknownVariantValue is opaque, and no further information can be extracted.
• It might inadvertently shadow other intended match arms.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Tcp

Udp

Unknown(UnknownVariantValue)

Unknown contains new variants that have been added since this code was generated.

Implementations

impl Protocol

pub fn as_str(&self) -> &str

Returns the &str value of the enum member.

Examples found in repository

src/model.rs (line 58346)

    fn as_ref(&self) -> &str {
        self.as_str()
    }

src/operation_ser.rs (line 3674)

pub fn serialize_operation_crate_operation_create_network_insights_path(
    input: &crate::input::CreateNetworkInsightsPathInput,
) -> Result<aws_smithy_http::body::SdkBody, aws_smithy_http::operation::error::SerializationError> {
    let mut out = String::new();
    #[allow(unused_mut)]
    let mut writer =
        aws_smithy_query::QueryWriter::new(&mut out, "CreateNetworkInsightsPath", "2016-11-15");
    #[allow(unused_mut)]
    let mut scope_1052 = writer.prefix("SourceIp");
    if let Some(var_1053) = &input.source_ip {
        scope_1052.string(var_1053);
    }
    #[allow(unused_mut)]
    let mut scope_1054 = writer.prefix("DestinationIp");
    if let Some(var_1055) = &input.destination_ip {
        scope_1054.string(var_1055);
    }
    #[allow(unused_mut)]
    let mut scope_1056 = writer.prefix("Source");
    if let Some(var_1057) = &input.source {
        scope_1056.string(var_1057);
    }
    #[allow(unused_mut)]
    let mut scope_1058 = writer.prefix("Destination");
    if let Some(var_1059) = &input.destination {
        scope_1058.string(var_1059);
    }
    #[allow(unused_mut)]
    let mut scope_1060 = writer.prefix("Protocol");
    if let Some(var_1061) = &input.protocol {
        scope_1060.string(var_1061.as_str());
    }
    #[allow(unused_mut)]
    let mut scope_1062 = writer.prefix("DestinationPort");
    if let Some(var_1063) = &input.destination_port {
        scope_1062.number(
            #[allow(clippy::useless_conversion)]
            aws_smithy_types::Number::NegInt((*var_1063).into()),
        );
    }
    #[allow(unused_mut)]
    let mut scope_1064 = writer.prefix("TagSpecification");
    if let Some(var_1065) = &input.tag_specifications {
        let mut list_1067 = scope_1064.start_list(true, Some("item"));
        for item_1066 in var_1065 {
            #[allow(unused_mut)]
            let mut entry_1068 = list_1067.entry();
            crate::query_ser::serialize_structure_crate_model_tag_specification(
                entry_1068, item_1066,
            )?;
        }
        list_1067.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1069 = writer.prefix("DryRun");
    if let Some(var_1070) = &input.dry_run {
        scope_1069.boolean(*var_1070);
    }
    #[allow(unused_mut)]
    let mut scope_1071 = writer.prefix("ClientToken");
    if let Some(var_1072) = &input.client_token {
        scope_1071.string(var_1072);
    }
    writer.finish();
    Ok(aws_smithy_http::body::SdkBody::from(out))
}

src/query_ser.rs (line 5989)

pub fn serialize_structure_crate_model_packet_header_statement_request(
    mut writer: aws_smithy_query::QueryValueWriter,
    input: &crate::model::PacketHeaderStatementRequest,
) -> Result<(), aws_smithy_http::operation::error::SerializationError> {
    #[allow(unused_mut)]
    let mut scope_1640 = writer.prefix("SourceAddress");
    if let Some(var_1641) = &input.source_addresses {
        let mut list_1643 = scope_1640.start_list(true, Some("item"));
        for item_1642 in var_1641 {
            #[allow(unused_mut)]
            let mut entry_1644 = list_1643.entry();
            entry_1644.string(item_1642);
        }
        list_1643.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1645 = writer.prefix("DestinationAddress");
    if let Some(var_1646) = &input.destination_addresses {
        let mut list_1648 = scope_1645.start_list(true, Some("item"));
        for item_1647 in var_1646 {
            #[allow(unused_mut)]
            let mut entry_1649 = list_1648.entry();
            entry_1649.string(item_1647);
        }
        list_1648.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1650 = writer.prefix("SourcePort");
    if let Some(var_1651) = &input.source_ports {
        let mut list_1653 = scope_1650.start_list(true, Some("item"));
        for item_1652 in var_1651 {
            #[allow(unused_mut)]
            let mut entry_1654 = list_1653.entry();
            entry_1654.string(item_1652);
        }
        list_1653.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1655 = writer.prefix("DestinationPort");
    if let Some(var_1656) = &input.destination_ports {
        let mut list_1658 = scope_1655.start_list(true, Some("item"));
        for item_1657 in var_1656 {
            #[allow(unused_mut)]
            let mut entry_1659 = list_1658.entry();
            entry_1659.string(item_1657);
        }
        list_1658.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1660 = writer.prefix("SourcePrefixList");
    if let Some(var_1661) = &input.source_prefix_lists {
        let mut list_1663 = scope_1660.start_list(true, Some("item"));
        for item_1662 in var_1661 {
            #[allow(unused_mut)]
            let mut entry_1664 = list_1663.entry();
            entry_1664.string(item_1662);
        }
        list_1663.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1665 = writer.prefix("DestinationPrefixList");
    if let Some(var_1666) = &input.destination_prefix_lists {
        let mut list_1668 = scope_1665.start_list(true, Some("item"));
        for item_1667 in var_1666 {
            #[allow(unused_mut)]
            let mut entry_1669 = list_1668.entry();
            entry_1669.string(item_1667);
        }
        list_1668.finish();
    }
    #[allow(unused_mut)]
    let mut scope_1670 = writer.prefix("Protocol");
    if let Some(var_1671) = &input.protocols {
        let mut list_1673 = scope_1670.start_list(true, Some("item"));
        for item_1672 in var_1671 {
            #[allow(unused_mut)]
            let mut entry_1674 = list_1673.entry();
            entry_1674.string(item_1672.as_str());
        }
        list_1673.finish();
    }
    Ok(())
}

pub const fn values() -> &'static [&'static str]

Returns all the &str values of the enum members.

Trait Implementations

impl AsRef<str> for Protocol

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Protocol

fn clone(&self) -> Protocol

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Protocol

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&str> for Protocol

fn from(s: &str) -> Self

Converts to this type from the input type.

impl FromStr for Protocol

type Err = Infallible

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Protocol

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Protocol

fn cmp(&self, other: &Protocol) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<Protocol> for Protocol

fn eq(&self, other: &Protocol) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Protocol> for Protocol

fn partial_cmp(&self, other: &Protocol) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for Protocol

impl StructuralEq for Protocol

impl StructuralPartialEq for Protocol