Struct promql_parser::parser::ast::Call

pub struct Call {
    pub func: Function,
    pub args: FunctionArgs,
}

Call represents Prometheus Function. Some functions have special cases:

exp

exp(v instant-vector) calculates the exponential function for all elements in v. Special cases are:

Exp(+Inf) = +Inf
Exp(NaN) = NaN

ln

ln(v instant-vector) calculates the natural logarithm for all elements in v. Special cases are:

ln(+Inf) = +Inf
ln(0) = -Inf
ln(x < 0) = NaN
ln(NaN) = NaN

TODO: support more special cases of function call

• acos()
• acosh()
• asin()
• asinh()
• atan()
• atanh()
• cos()
• cosh()
• sin()
• sinh()
• tan()
• tanh()

Fields

func: Function

args: FunctionArgs

Trait Implementations

impl Clone for Call

fn clone(&self) -> Call

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Call

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

Formats the value using the given formatter.

impl Display for Call

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

Formats the value using the given formatter.

impl PartialEq<Call> for Call

fn eq(&self, other: &Call) -> 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 Prettier for Call

fn format(&self, level: usize, max: usize) -> String

override format if expr needs to be splited into multiple lines

fn pretty(&self, level: usize, max: usize) -> String

max param is short for max_characters_per_line.

fn needs_split(&self, max: usize) -> bool

override needs_split to return false, in order not to split multiple lines

impl Eq for Call

impl StructuralEq for Call

impl StructuralPartialEq for Call