Lawrence Bethlenfalvy
09cfcb1839
I got very confused and started mucking about with "spawn" when in fact all I needed was the "inline" extension type in orcx that allows the interpreter to expose custom constants.
27 lines
943 B
Rust
27 lines
943 B
Rust
use std::fmt;
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use itertools::{Itertools, Position};
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pub struct PrintList<'a, I: Iterator<Item = E> + Clone, E: fmt::Display>(pub I, pub &'a str);
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impl<'a, I: Iterator<Item = E> + Clone, E: fmt::Display> fmt::Display for PrintList<'a, I, E> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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for (pos, item) in self.0.clone().with_position() {
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match pos {
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Position::First | Position::Only => write!(f, "{item}")?,
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Position::Middle => write!(f, ", {item}")?,
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Position::Last => write!(f, ", {} {item}", self.1)?,
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}
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}
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Ok(())
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}
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}
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pub trait IteratorPrint: Iterator<Item: fmt::Display> + Clone {
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/// Pretty-print a list with a comma-separated enumeration and an operator
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/// word (such as "and" or "or") inserted before the last
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fn display<'a>(self, operator: &'a str) -> PrintList<'a, Self, Self::Item> {
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PrintList(self, operator)
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}
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}
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impl<T: Iterator<Item: fmt::Display> + Clone> IteratorPrint for T {}
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