Function promql::parse

pub fn parse(
    e: &[u8], 
    allow_periods: bool
) -> Result<Node, Err<CompleteByteSlice>>

Parse expression string into an AST.

This parser operates on byte sequence instead of &str because of the fact that PromQL, like Go, allows raw byte sequences to be included in the string literals (e.g. {omg='∞'} is equivalent to both {omg='\u221e'} and {omg='\xe2\x88\x9e'}).

Set allow_periods to true to allow vector names with periods (like foo.bar).