Struct Sum

pub struct Sum {
    pub variable: LitSym,
    pub range: Range,
    pub body: Box<Expr>,
    pub span: Range<usize>,
}

A sum expression, such as sum n in 1..10 of n.

A sum expression is a shortcut for a loop that represents a summation. The final expression is summed over the specified range, with a specific variable name taking on each value in the range. The above example is equivalent to the following code:

out = 0
for n in 1..10 {
    out += n
}
out

Fields

variable: LitSym

The variable name representing each value in the range.

range: Range

The range of values that the variable will take on.

body: Box<Expr>

The body of the summation.

span: Range<usize>

The region of the source code that this sum expression was parsed from.

Implementations

impl Sum

pub fn span(&self) -> Range<usize>

Returns the span of the sum expression.

Trait Implementations

impl Clone for Sum

fn clone(&self) -> Sum

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Sum

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

Formats the value using the given formatter.

impl Display for Sum

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

Formats the value using the given formatter.

impl Latex for Sum

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

Format the value as LaTeX.

fn as_display(&self) -> LatexFormatter<'_, Self>

Wraps the value in a LatexFormatter, which implements Display.

impl<'source> Parse<'source> for Sum

fn std_parse( input: &mut Parser<'source>, recoverable_errors: &mut Vec<Error>, ) -> Result<Self, Vec<Error>>

Parses a value from the given stream of tokens, advancing the stream past the consumed tokens if parsing is successful.

fn parse(input: &mut Parser<'source>) -> ParseResult<Self>

Parses a value from the given stream of tokens, advancing the stream past the consumed tokens if parsing is successful.

impl PartialEq for Sum

fn eq(&self, other: &Sum) -> 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 Eq for Sum

impl StructuralPartialEq for Sum