Enum cql3_parser::common::Identifier

pub enum Identifier {
    Quoted(String),
    Unquoted(String),
}

Identifers are either Quoted or Unquoted.

• Unquoted Identifiers: are case insensitive
• Quoted Identifiers: are case sensitive. double quotes appearing within the quoted string are escaped by doubling (i.e. "foo""bar" is interpreted as foo“bar`)

Quoted lower lower case is equivalent to unquoted mixed case. Quoted( myid ) == Unquoted( myid ) Quoted( myid ) == Unquoted( “myId” ) Quoted( myid ) != Quoted( “myId” )

It is possible to create an Unquoted identifier with an embedded quote (e.g. Identifier::Unquoted( "foo\"bar" )). Note that a quote as the first character in an Unquoted Identifier can cause problems if the Identifier is converted to a string and then parsed again as the second parse will create a Quoted identifier.

Variants

Quoted(String)

This variant is case sensitive “fOo”“bAr”“” is stored as fOo“bAr“

Unquoted(String)

This variant is case insensitive Only ascii alphanumeric and _ characters are allowed in this variant fOo_bAr is stored as fOo_bAr

Implementations

impl Identifier

pub fn parse(text: &str) -> Identifier

parses strings as returned by the parser into Quoted or Unquoted Identifiers.

• Unquoted Identifiers: are case insensitive
• Quoted Identifiers: are case sensitive. double quotes appearing within the quoted string are escaped by doubling (i.e. "foo""bar" is interpreted as foo“bar`)

If the string starts with " it is assumed to be a quoted identifier, the leading and trailing quotes are removed and the internal doubled quotes ("") are converted to simple quotes (").

Trait Implementations

impl Clone for Identifier

fn clone(&self) -> Identifier

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Identifier

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

Formats the value using the given formatter.

impl Default for Identifier

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Identifier

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
    __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Identifier

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

Formats the value using the given formatter.

impl From<&String> for Identifier

fn from(txt: &String) -> Self

Converts to this type from the input type.

impl From<&str> for Identifier

fn from(txt: &str) -> Self

Converts to this type from the input type.

impl Hash for Identifier

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,

Feeds a slice of this type into the given Hasher.

impl Ord for Identifier

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<Identifier> for Identifier

fn eq(&self, other: &Self) -> 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<Identifier> for Identifier

fn partial_cmp(&self, other: &Identifier) -> 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 Identifier

impl StructuralEq for Identifier