Struct BoolTagExpr 

pub struct BoolTagExpr(/* private fields */);

A boolean expression tree.

This is a simple wrapper around a Node.

Implementations

impl BoolTagExpr

pub fn from<T>(boolean_expr: T) -> Result<Self, ParseError>

where T: BoolTagExprLexicalParse + BoolTagExprSyntaxParse<T>,

Produce a BoolTagExpr from a type that implements both LexicalParse and SyntaxParse<T>

pub fn to_boolean_expression(self) -> String

Produce a logical boolean expression string from a BoolTagExpr

pub fn to_sql(self, table_info: &DbTableInfo) -> String

Produce an SQL boolean statement from a BoolTagExpr for pulling entities out of a database

If the SQL string returned by this function is denoted by X, then, as an example, we can use it in the following way:

SELECT id, name
FROM entities
WHERE X
ORDER BY name

pub fn into_node(self) -> Node

Get the boolean expr tree

Trait Implementations

impl Clone for BoolTagExpr

fn clone(&self) -> BoolTagExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BoolTagExpr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BoolTagExpr

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for BoolTagExpr

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 BoolTagExpr

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for BoolTagExpr

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for BoolTagExpr

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Serialize for BoolTagExpr

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for BoolTagExpr

impl StructuralPartialEq for BoolTagExpr