proc-macro2 1.0.106

A substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case.
Documentation 
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// This code exercises the surface area that we expect of Span's unstable API.
// If the current toolchain is able to compile it, then proc-macro2 is able to
// offer these APIs too.

#![cfg_attr(procmacro2_build_probe, no_std)]
#![cfg_attr(procmacro2_build_probe, feature(proc_macro_span))]

extern crate alloc;
extern crate proc_macro;
extern crate std;

use alloc::string::String;
use core::ops::{Range, RangeBounds};
use proc_macro::{Literal, Span};
use std::path::PathBuf;

pub fn byte_range(this: &Span) -> Range<usize> {
    this.byte_range()
}

pub fn start(this: &Span) -> Span {
    this.start()
}

pub fn end(this: &Span) -> Span {
    this.end()
}

pub fn line(this: &Span) -> usize {
    this.line()
}

pub fn column(this: &Span) -> usize {
    this.column()
}

pub fn file(this: &Span) -> String {
    this.file()
}

pub fn local_file(this: &Span) -> Option<PathBuf> {
    this.local_file()
}

pub fn join(this: &Span, other: Span) -> Option<Span> {
    this.join(other)
}

pub fn subspan<R: RangeBounds<usize>>(this: &Literal, range: R) -> Option<Span> {
    this.subspan(range)
}

// Include in sccache cache key.
#[cfg(procmacro2_build_probe)]
const _: Option<&str> = option_env!("RUSTC_BOOTSTRAP");