Enum vector_expr::Expression

pub enum Expression {
    Boolean(BoolExpression),
    Real(RealExpression),
    String(StringExpression),
}

Top-level parseable calculation.

Variants

Boolean(BoolExpression)

Real(RealExpression)

String(StringExpression)

Implementations

impl Expression

pub fn unwrap_real(self) -> RealExpression

Assume this expression is real-valued.

pub fn unwrap_string(self) -> StringExpression

Assume this expression is string-valued.

pub fn unwrap_bool(self) -> BoolExpression

Assume this expression is boolean-valued.

pub fn parse_real_variable_names( input: &str ) -> Result<HashSet<String>, ParseError>

pub fn parse_string_variable_names( input: &str ) -> Result<HashSet<String>, ParseError>

pub fn parse( input: &str, binding_map: impl Fn(&str) -> BindingId ) -> Result<Self, ParseError>

Parse the expression from input.

binding_map determines which variable name maps to each data binding. As variable names are encountered during parsing, they are replaced by BindingIds in the Expression syntax tree. This allows the Expression to be efficiently reused with many different data bindings.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.