mirror of
https://git.proxmox.com/git/rustc
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758 lines
22 KiB
Rust
758 lines
22 KiB
Rust
#![allow(
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clippy::assertions_on_result_states,
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clippy::items_after_statements,
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clippy::non_ascii_literal,
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clippy::octal_escapes
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)]
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use proc_macro2::{Ident, Literal, Punct, Spacing, Span, TokenStream, TokenTree};
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use std::iter;
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use std::panic;
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use std::str::{self, FromStr};
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#[test]
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fn idents() {
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assert_eq!(
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Ident::new("String", Span::call_site()).to_string(),
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"String"
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);
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assert_eq!(Ident::new("fn", Span::call_site()).to_string(), "fn");
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assert_eq!(Ident::new("_", Span::call_site()).to_string(), "_");
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}
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#[test]
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fn raw_idents() {
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assert_eq!(
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Ident::new_raw("String", Span::call_site()).to_string(),
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"r#String"
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);
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assert_eq!(Ident::new_raw("fn", Span::call_site()).to_string(), "r#fn");
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}
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#[test]
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#[should_panic(expected = "`r#_` cannot be a raw identifier")]
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fn ident_raw_underscore() {
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Ident::new_raw("_", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "`r#super` cannot be a raw identifier")]
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fn ident_raw_reserved() {
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Ident::new_raw("super", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "Ident is not allowed to be empty; use Option<Ident>")]
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fn ident_empty() {
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Ident::new("", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "Ident cannot be a number; use Literal instead")]
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fn ident_number() {
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Ident::new("255", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "\"a#\" is not a valid Ident")]
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fn ident_invalid() {
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Ident::new("a#", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "not a valid Ident")]
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fn raw_ident_empty() {
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Ident::new("r#", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "not a valid Ident")]
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fn raw_ident_number() {
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Ident::new("r#255", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "\"r#a#\" is not a valid Ident")]
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fn raw_ident_invalid() {
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Ident::new("r#a#", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "not a valid Ident")]
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fn lifetime_empty() {
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Ident::new("'", Span::call_site());
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}
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#[test]
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#[should_panic(expected = "not a valid Ident")]
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fn lifetime_number() {
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Ident::new("'255", Span::call_site());
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}
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#[test]
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fn lifetime_invalid() {
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let result = panic::catch_unwind(|| Ident::new("'a#", Span::call_site()));
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match result {
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Err(box_any) => {
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let message = box_any.downcast_ref::<String>().unwrap();
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let expected1 = r#""\'a#" is not a valid Ident"#; // 1.31.0 .. 1.53.0
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let expected2 = r#""'a#" is not a valid Ident"#; // 1.53.0 ..
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assert!(
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message == expected1 || message == expected2,
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"panic message does not match expected string\n\
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\x20 panic message: `{:?}`\n\
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\x20expected message: `{:?}`",
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message,
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expected2,
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);
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}
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Ok(_) => panic!("test did not panic as expected"),
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}
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}
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#[test]
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fn literal_string() {
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assert_eq!(Literal::string("foo").to_string(), "\"foo\"");
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assert_eq!(Literal::string("\"").to_string(), "\"\\\"\"");
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assert_eq!(Literal::string("didn't").to_string(), "\"didn't\"");
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assert_eq!(
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Literal::string("a\00b\07c\08d\0e\0").to_string(),
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"\"a\\x000b\\x007c\\08d\\0e\\0\"",
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);
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"\"\\\r\n x\"".parse::<TokenStream>().unwrap();
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"\"\\\r\n \rx\"".parse::<TokenStream>().unwrap_err();
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}
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#[test]
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fn literal_raw_string() {
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"r\"\r\n\"".parse::<TokenStream>().unwrap();
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fn raw_string_literal_with_hashes(n: usize) -> String {
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let mut literal = String::new();
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literal.push('r');
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literal.extend(iter::repeat('#').take(n));
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literal.push('"');
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literal.push('"');
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literal.extend(iter::repeat('#').take(n));
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literal
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}
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raw_string_literal_with_hashes(255)
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.parse::<TokenStream>()
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.unwrap();
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// https://github.com/rust-lang/rust/pull/95251
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raw_string_literal_with_hashes(256)
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.parse::<TokenStream>()
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.unwrap_err();
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}
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#[test]
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fn literal_byte_string() {
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assert_eq!(Literal::byte_string(b"").to_string(), "b\"\"");
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assert_eq!(
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Literal::byte_string(b"\0\t\n\r\"\\2\x10").to_string(),
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"b\"\\0\\t\\n\\r\\\"\\\\2\\x10\"",
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);
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assert_eq!(
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Literal::byte_string(b"a\00b\07c\08d\0e\0").to_string(),
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"b\"a\\x000b\\x007c\\08d\\0e\\0\"",
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);
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"b\"\\\r\n x\"".parse::<TokenStream>().unwrap();
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"b\"\\\r\n \rx\"".parse::<TokenStream>().unwrap_err();
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"b\"\\\r\n \u{a0}x\"".parse::<TokenStream>().unwrap_err();
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"br\"\u{a0}\"".parse::<TokenStream>().unwrap_err();
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}
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#[test]
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fn literal_c_string() {
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let strings = r###"
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c"hello\x80我叫\u{1F980}" // from the RFC
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cr"\"
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cr##"Hello "world"!"##
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c"\t\n\r\"\\"
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"###;
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let mut tokens = strings.parse::<TokenStream>().unwrap().into_iter();
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for expected in &[
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r#"c"hello\x80我叫\u{1F980}""#,
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r#"cr"\""#,
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r###"cr##"Hello "world"!"##"###,
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r#"c"\t\n\r\"\\""#,
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] {
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match tokens.next().unwrap() {
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TokenTree::Literal(literal) => {
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assert_eq!(literal.to_string(), *expected);
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}
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unexpected => panic!("unexpected token: {:?}", unexpected),
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}
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}
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if let Some(unexpected) = tokens.next() {
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panic!("unexpected token: {:?}", unexpected);
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}
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for invalid in &[r#"c"\0""#, r#"c"\x00""#, r#"c"\u{0}""#, "c\"\0\""] {
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if let Ok(unexpected) = invalid.parse::<TokenStream>() {
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panic!("unexpected token: {:?}", unexpected);
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}
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}
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}
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#[test]
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fn literal_character() {
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assert_eq!(Literal::character('x').to_string(), "'x'");
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assert_eq!(Literal::character('\'').to_string(), "'\\''");
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assert_eq!(Literal::character('"').to_string(), "'\"'");
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}
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#[test]
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fn literal_integer() {
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assert_eq!(Literal::u8_suffixed(10).to_string(), "10u8");
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assert_eq!(Literal::u16_suffixed(10).to_string(), "10u16");
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assert_eq!(Literal::u32_suffixed(10).to_string(), "10u32");
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assert_eq!(Literal::u64_suffixed(10).to_string(), "10u64");
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assert_eq!(Literal::u128_suffixed(10).to_string(), "10u128");
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assert_eq!(Literal::usize_suffixed(10).to_string(), "10usize");
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assert_eq!(Literal::i8_suffixed(10).to_string(), "10i8");
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assert_eq!(Literal::i16_suffixed(10).to_string(), "10i16");
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assert_eq!(Literal::i32_suffixed(10).to_string(), "10i32");
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assert_eq!(Literal::i64_suffixed(10).to_string(), "10i64");
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assert_eq!(Literal::i128_suffixed(10).to_string(), "10i128");
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assert_eq!(Literal::isize_suffixed(10).to_string(), "10isize");
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assert_eq!(Literal::u8_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::u16_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::u32_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::u64_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::u128_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::usize_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::i8_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::i16_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::i32_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::i64_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::i128_unsuffixed(10).to_string(), "10");
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assert_eq!(Literal::isize_unsuffixed(10).to_string(), "10");
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}
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#[test]
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fn literal_float() {
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assert_eq!(Literal::f32_suffixed(10.0).to_string(), "10f32");
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assert_eq!(Literal::f64_suffixed(10.0).to_string(), "10f64");
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assert_eq!(Literal::f32_unsuffixed(10.0).to_string(), "10.0");
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assert_eq!(Literal::f64_unsuffixed(10.0).to_string(), "10.0");
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}
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#[test]
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fn literal_suffix() {
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fn token_count(p: &str) -> usize {
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p.parse::<TokenStream>().unwrap().into_iter().count()
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}
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assert_eq!(token_count("999u256"), 1);
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assert_eq!(token_count("999r#u256"), 3);
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assert_eq!(token_count("1."), 1);
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assert_eq!(token_count("1.f32"), 3);
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assert_eq!(token_count("1.0_0"), 1);
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assert_eq!(token_count("1._0"), 3);
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assert_eq!(token_count("1._m"), 3);
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assert_eq!(token_count("\"\"s"), 1);
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assert_eq!(token_count("r\"\"r"), 1);
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assert_eq!(token_count("b\"\"b"), 1);
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assert_eq!(token_count("br\"\"br"), 1);
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assert_eq!(token_count("r#\"\"#r"), 1);
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assert_eq!(token_count("'c'c"), 1);
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assert_eq!(token_count("b'b'b"), 1);
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assert_eq!(token_count("0E"), 1);
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assert_eq!(token_count("0o0A"), 1);
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assert_eq!(token_count("0E--0"), 4);
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assert_eq!(token_count("0.0ECMA"), 1);
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}
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#[test]
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fn literal_iter_negative() {
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let negative_literal = Literal::i32_suffixed(-3);
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let tokens = TokenStream::from(TokenTree::Literal(negative_literal));
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let mut iter = tokens.into_iter();
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match iter.next().unwrap() {
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TokenTree::Punct(punct) => {
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assert_eq!(punct.as_char(), '-');
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assert_eq!(punct.spacing(), Spacing::Alone);
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}
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unexpected => panic!("unexpected token {:?}", unexpected),
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}
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match iter.next().unwrap() {
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TokenTree::Literal(literal) => {
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assert_eq!(literal.to_string(), "3i32");
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}
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unexpected => panic!("unexpected token {:?}", unexpected),
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}
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assert!(iter.next().is_none());
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}
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#[test]
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fn literal_parse() {
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assert!("1".parse::<Literal>().is_ok());
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assert!("-1".parse::<Literal>().is_ok());
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assert!("-1u12".parse::<Literal>().is_ok());
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assert!("1.0".parse::<Literal>().is_ok());
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assert!("-1.0".parse::<Literal>().is_ok());
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assert!("-1.0f12".parse::<Literal>().is_ok());
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assert!("'a'".parse::<Literal>().is_ok());
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assert!("\"\n\"".parse::<Literal>().is_ok());
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assert!("0 1".parse::<Literal>().is_err());
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assert!(" 0".parse::<Literal>().is_err());
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assert!("0 ".parse::<Literal>().is_err());
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assert!("/* comment */0".parse::<Literal>().is_err());
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assert!("0/* comment */".parse::<Literal>().is_err());
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assert!("0// comment".parse::<Literal>().is_err());
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assert!("- 1".parse::<Literal>().is_err());
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assert!("- 1.0".parse::<Literal>().is_err());
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assert!("-\"\"".parse::<Literal>().is_err());
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}
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#[test]
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fn literal_span() {
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let positive = "0.1".parse::<Literal>().unwrap();
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let negative = "-0.1".parse::<Literal>().unwrap();
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let subspan = positive.subspan(1..2);
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#[cfg(not(span_locations))]
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{
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let _ = negative;
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assert!(subspan.is_none());
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}
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#[cfg(span_locations)]
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{
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assert_eq!(positive.span().start().column, 0);
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assert_eq!(positive.span().end().column, 3);
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assert_eq!(negative.span().start().column, 0);
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assert_eq!(negative.span().end().column, 4);
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assert_eq!(subspan.unwrap().source_text().unwrap(), ".");
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}
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assert!(positive.subspan(1..4).is_none());
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}
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#[test]
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fn roundtrip() {
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fn roundtrip(p: &str) {
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println!("parse: {}", p);
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let s = p.parse::<TokenStream>().unwrap().to_string();
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println!("first: {}", s);
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let s2 = s.parse::<TokenStream>().unwrap().to_string();
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assert_eq!(s, s2);
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}
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roundtrip("a");
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roundtrip("<<");
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roundtrip("<<=");
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roundtrip(
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"
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1
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1.0
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1f32
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2f64
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1usize
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4isize
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4e10
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1_000
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1_0i32
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8u8
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9
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0
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0xffffffffffffffffffffffffffffffff
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1x
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1u80
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1f320
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",
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);
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roundtrip("'a");
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roundtrip("'_");
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roundtrip("'static");
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roundtrip("'\\u{10__FFFF}'");
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roundtrip("\"\\u{10_F0FF__}foo\\u{1_0_0_0__}\"");
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}
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#[test]
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fn fail() {
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fn fail(p: &str) {
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if let Ok(s) = p.parse::<TokenStream>() {
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panic!("should have failed to parse: {}\n{:#?}", p, s);
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}
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}
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fail("' static");
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fail("r#1");
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fail("r#_");
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fail("\"\\u{0000000}\""); // overlong unicode escape (rust allows at most 6 hex digits)
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fail("\"\\u{999999}\""); // outside of valid range of char
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fail("\"\\u{_0}\""); // leading underscore
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fail("\"\\u{}\""); // empty
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fail("b\"\r\""); // bare carriage return in byte string
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fail("r\"\r\""); // bare carriage return in raw string
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fail("\"\\\r \""); // backslash carriage return
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fail("'aa'aa");
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fail("br##\"\"#");
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fail("\"\\\n\u{85}\r\"");
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}
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#[cfg(span_locations)]
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#[test]
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fn span_test() {
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check_spans(
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"\
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/// This is a document comment
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testing 123
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{
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testing 234
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}",
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&[
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(1, 0, 1, 30), // #
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(1, 0, 1, 30), // [ ... ]
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(1, 0, 1, 30), // doc
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(1, 0, 1, 30), // =
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(1, 0, 1, 30), // "This is..."
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(2, 0, 2, 7), // testing
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(2, 8, 2, 11), // 123
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(3, 0, 5, 1), // { ... }
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(4, 2, 4, 9), // testing
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(4, 10, 4, 13), // 234
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],
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);
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}
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#[cfg(procmacro2_semver_exempt)]
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#[cfg(not(nightly))]
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#[test]
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fn default_span() {
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let start = Span::call_site().start();
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assert_eq!(start.line, 1);
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assert_eq!(start.column, 0);
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let end = Span::call_site().end();
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assert_eq!(end.line, 1);
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assert_eq!(end.column, 0);
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let source_file = Span::call_site().source_file();
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assert_eq!(source_file.path().to_string_lossy(), "<unspecified>");
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assert!(!source_file.is_real());
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}
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#[cfg(procmacro2_semver_exempt)]
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#[test]
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fn span_join() {
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let source1 = "aaa\nbbb"
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.parse::<TokenStream>()
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.unwrap()
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.into_iter()
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.collect::<Vec<_>>();
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let source2 = "ccc\nddd"
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.parse::<TokenStream>()
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.unwrap()
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.into_iter()
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.collect::<Vec<_>>();
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assert!(source1[0].span().source_file() != source2[0].span().source_file());
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assert_eq!(
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source1[0].span().source_file(),
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source1[1].span().source_file()
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);
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let joined1 = source1[0].span().join(source1[1].span());
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let joined2 = source1[0].span().join(source2[0].span());
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assert!(joined1.is_some());
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assert!(joined2.is_none());
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let start = joined1.unwrap().start();
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let end = joined1.unwrap().end();
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assert_eq!(start.line, 1);
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assert_eq!(start.column, 0);
|
|
assert_eq!(end.line, 2);
|
|
assert_eq!(end.column, 3);
|
|
|
|
assert_eq!(
|
|
joined1.unwrap().source_file(),
|
|
source1[0].span().source_file()
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn no_panic() {
|
|
let s = str::from_utf8(b"b\'\xc2\x86 \x00\x00\x00^\"").unwrap();
|
|
assert!(s.parse::<TokenStream>().is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn punct_before_comment() {
|
|
let mut tts = TokenStream::from_str("~// comment").unwrap().into_iter();
|
|
match tts.next().unwrap() {
|
|
TokenTree::Punct(tt) => {
|
|
assert_eq!(tt.as_char(), '~');
|
|
assert_eq!(tt.spacing(), Spacing::Alone);
|
|
}
|
|
wrong => panic!("wrong token {:?}", wrong),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn joint_last_token() {
|
|
// This test verifies that we match the behavior of libproc_macro *not* in
|
|
// the range nightly-2020-09-06 through nightly-2020-09-10, in which this
|
|
// behavior was temporarily broken.
|
|
// See https://github.com/rust-lang/rust/issues/76399
|
|
|
|
let joint_punct = Punct::new(':', Spacing::Joint);
|
|
let stream = TokenStream::from(TokenTree::Punct(joint_punct));
|
|
let punct = match stream.into_iter().next().unwrap() {
|
|
TokenTree::Punct(punct) => punct,
|
|
_ => unreachable!(),
|
|
};
|
|
assert_eq!(punct.spacing(), Spacing::Joint);
|
|
}
|
|
|
|
#[test]
|
|
fn raw_identifier() {
|
|
let mut tts = TokenStream::from_str("r#dyn").unwrap().into_iter();
|
|
match tts.next().unwrap() {
|
|
TokenTree::Ident(raw) => assert_eq!("r#dyn", raw.to_string()),
|
|
wrong => panic!("wrong token {:?}", wrong),
|
|
}
|
|
assert!(tts.next().is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn test_debug_ident() {
|
|
let ident = Ident::new("proc_macro", Span::call_site());
|
|
|
|
#[cfg(not(span_locations))]
|
|
let expected = "Ident(proc_macro)";
|
|
|
|
#[cfg(span_locations)]
|
|
let expected = "Ident { sym: proc_macro }";
|
|
|
|
assert_eq!(expected, format!("{:?}", ident));
|
|
}
|
|
|
|
#[test]
|
|
fn test_debug_tokenstream() {
|
|
let tts = TokenStream::from_str("[a + 1]").unwrap();
|
|
|
|
#[cfg(not(span_locations))]
|
|
let expected = "\
|
|
TokenStream [
|
|
Group {
|
|
delimiter: Bracket,
|
|
stream: TokenStream [
|
|
Ident {
|
|
sym: a,
|
|
},
|
|
Punct {
|
|
char: '+',
|
|
spacing: Alone,
|
|
},
|
|
Literal {
|
|
lit: 1,
|
|
},
|
|
],
|
|
},
|
|
]\
|
|
";
|
|
|
|
#[cfg(not(span_locations))]
|
|
let expected_before_trailing_commas = "\
|
|
TokenStream [
|
|
Group {
|
|
delimiter: Bracket,
|
|
stream: TokenStream [
|
|
Ident {
|
|
sym: a
|
|
},
|
|
Punct {
|
|
char: '+',
|
|
spacing: Alone
|
|
},
|
|
Literal {
|
|
lit: 1
|
|
}
|
|
]
|
|
}
|
|
]\
|
|
";
|
|
|
|
#[cfg(span_locations)]
|
|
let expected = "\
|
|
TokenStream [
|
|
Group {
|
|
delimiter: Bracket,
|
|
stream: TokenStream [
|
|
Ident {
|
|
sym: a,
|
|
span: bytes(2..3),
|
|
},
|
|
Punct {
|
|
char: '+',
|
|
spacing: Alone,
|
|
span: bytes(4..5),
|
|
},
|
|
Literal {
|
|
lit: 1,
|
|
span: bytes(6..7),
|
|
},
|
|
],
|
|
span: bytes(1..8),
|
|
},
|
|
]\
|
|
";
|
|
|
|
#[cfg(span_locations)]
|
|
let expected_before_trailing_commas = "\
|
|
TokenStream [
|
|
Group {
|
|
delimiter: Bracket,
|
|
stream: TokenStream [
|
|
Ident {
|
|
sym: a,
|
|
span: bytes(2..3)
|
|
},
|
|
Punct {
|
|
char: '+',
|
|
spacing: Alone,
|
|
span: bytes(4..5)
|
|
},
|
|
Literal {
|
|
lit: 1,
|
|
span: bytes(6..7)
|
|
}
|
|
],
|
|
span: bytes(1..8)
|
|
}
|
|
]\
|
|
";
|
|
|
|
let actual = format!("{:#?}", tts);
|
|
if actual.ends_with(",\n]") {
|
|
assert_eq!(expected, actual);
|
|
} else {
|
|
assert_eq!(expected_before_trailing_commas, actual);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn default_tokenstream_is_empty() {
|
|
let default_token_stream = <TokenStream as Default>::default();
|
|
|
|
assert!(default_token_stream.is_empty());
|
|
}
|
|
|
|
#[test]
|
|
fn tokenstream_size_hint() {
|
|
let tokens = "a b (c d) e".parse::<TokenStream>().unwrap();
|
|
|
|
assert_eq!(tokens.into_iter().size_hint(), (4, Some(4)));
|
|
}
|
|
|
|
#[test]
|
|
fn tuple_indexing() {
|
|
// This behavior may change depending on https://github.com/rust-lang/rust/pull/71322
|
|
let mut tokens = "tuple.0.0".parse::<TokenStream>().unwrap().into_iter();
|
|
assert_eq!("tuple", tokens.next().unwrap().to_string());
|
|
assert_eq!(".", tokens.next().unwrap().to_string());
|
|
assert_eq!("0.0", tokens.next().unwrap().to_string());
|
|
assert!(tokens.next().is_none());
|
|
}
|
|
|
|
#[cfg(span_locations)]
|
|
#[test]
|
|
fn non_ascii_tokens() {
|
|
check_spans("// abc", &[]);
|
|
check_spans("// ábc", &[]);
|
|
check_spans("// abc x", &[]);
|
|
check_spans("// ábc x", &[]);
|
|
check_spans("/* abc */ x", &[(1, 10, 1, 11)]);
|
|
check_spans("/* ábc */ x", &[(1, 10, 1, 11)]);
|
|
check_spans("/* ab\nc */ x", &[(2, 5, 2, 6)]);
|
|
check_spans("/* áb\nc */ x", &[(2, 5, 2, 6)]);
|
|
check_spans("/*** abc */ x", &[(1, 12, 1, 13)]);
|
|
check_spans("/*** ábc */ x", &[(1, 12, 1, 13)]);
|
|
check_spans(r#""abc""#, &[(1, 0, 1, 5)]);
|
|
check_spans(r#""ábc""#, &[(1, 0, 1, 5)]);
|
|
check_spans(r###"r#"abc"#"###, &[(1, 0, 1, 8)]);
|
|
check_spans(r###"r#"ábc"#"###, &[(1, 0, 1, 8)]);
|
|
check_spans("r#\"a\nc\"#", &[(1, 0, 2, 3)]);
|
|
check_spans("r#\"á\nc\"#", &[(1, 0, 2, 3)]);
|
|
check_spans("'a'", &[(1, 0, 1, 3)]);
|
|
check_spans("'á'", &[(1, 0, 1, 3)]);
|
|
check_spans("//! abc", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]);
|
|
check_spans("//! ábc", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]);
|
|
check_spans("//! abc\n", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]);
|
|
check_spans("//! ábc\n", &[(1, 0, 1, 7), (1, 0, 1, 7), (1, 0, 1, 7)]);
|
|
check_spans("/*! abc */", &[(1, 0, 1, 10), (1, 0, 1, 10), (1, 0, 1, 10)]);
|
|
check_spans("/*! ábc */", &[(1, 0, 1, 10), (1, 0, 1, 10), (1, 0, 1, 10)]);
|
|
check_spans("/*! a\nc */", &[(1, 0, 2, 4), (1, 0, 2, 4), (1, 0, 2, 4)]);
|
|
check_spans("/*! á\nc */", &[(1, 0, 2, 4), (1, 0, 2, 4), (1, 0, 2, 4)]);
|
|
check_spans("abc", &[(1, 0, 1, 3)]);
|
|
check_spans("ábc", &[(1, 0, 1, 3)]);
|
|
check_spans("ábć", &[(1, 0, 1, 3)]);
|
|
check_spans("abc// foo", &[(1, 0, 1, 3)]);
|
|
check_spans("ábc// foo", &[(1, 0, 1, 3)]);
|
|
check_spans("ábć// foo", &[(1, 0, 1, 3)]);
|
|
check_spans("b\"a\\\n c\"", &[(1, 0, 2, 3)]);
|
|
}
|
|
|
|
#[cfg(span_locations)]
|
|
fn check_spans(p: &str, mut lines: &[(usize, usize, usize, usize)]) {
|
|
let ts = p.parse::<TokenStream>().unwrap();
|
|
check_spans_internal(ts, &mut lines);
|
|
assert!(lines.is_empty(), "leftover ranges: {:?}", lines);
|
|
}
|
|
|
|
#[cfg(span_locations)]
|
|
fn check_spans_internal(ts: TokenStream, lines: &mut &[(usize, usize, usize, usize)]) {
|
|
for i in ts {
|
|
if let Some((&(sline, scol, eline, ecol), rest)) = lines.split_first() {
|
|
*lines = rest;
|
|
|
|
let start = i.span().start();
|
|
assert_eq!(start.line, sline, "sline did not match for {}", i);
|
|
assert_eq!(start.column, scol, "scol did not match for {}", i);
|
|
|
|
let end = i.span().end();
|
|
assert_eq!(end.line, eline, "eline did not match for {}", i);
|
|
assert_eq!(end.column, ecol, "ecol did not match for {}", i);
|
|
|
|
if let TokenTree::Group(g) = i {
|
|
check_spans_internal(g.stream().clone(), lines);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn whitespace() {
|
|
// space, horizontal tab, vertical tab, form feed, carriage return, line
|
|
// feed, non-breaking space, left-to-right mark, right-to-left mark
|
|
let various_spaces = " \t\u{b}\u{c}\r\n\u{a0}\u{200e}\u{200f}";
|
|
let tokens = various_spaces.parse::<TokenStream>().unwrap();
|
|
assert_eq!(tokens.into_iter().count(), 0);
|
|
|
|
let lone_carriage_return = " \r ";
|
|
lone_carriage_return.parse::<TokenStream>().unwrap_err();
|
|
}
|
|
|
|
#[test]
|
|
fn byte_order_mark() {
|
|
let string = "\u{feff}foo";
|
|
let tokens = string.parse::<TokenStream>().unwrap();
|
|
match tokens.into_iter().next().unwrap() {
|
|
TokenTree::Ident(ident) => assert_eq!(ident, "foo"),
|
|
_ => unreachable!(),
|
|
}
|
|
|
|
let string = "foo\u{feff}";
|
|
string.parse::<TokenStream>().unwrap_err();
|
|
}
|