rocket_codegen 0.2.10

Code generation for the Rocket web framework.
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use syntax::codemap::{Span, BytePos};

pub trait SpanExt {
    fn shorten_to(self, to_length: usize) -> Span;

    /// Trim the span on the left and right by `length`.
    fn trim(self, length: u32) -> Span;

    /// Trim the span on the left by `length`.
    fn trim_left(self, length: usize) -> Span;

    /// Trim the span on the right by `length`.
    fn trim_right(self, length: usize) -> Span;
}

impl SpanExt for Span {
    fn trim_left(mut self, length: usize) -> Span {
        self.lo = self.lo + BytePos(length as u32);
        self
    }

    fn trim_right(mut self, length: usize) -> Span {
        self.hi = self.hi - BytePos(length as u32);
        self
    }

    fn shorten_to(mut self, to_length: usize) -> Span {
        self.hi = self.lo + BytePos(to_length as u32);
        self
    }

    fn trim(mut self, length: u32) -> Span {
        self.lo = self.lo + BytePos(length);
        self.hi = self.hi - BytePos(length);
        self
    }
}