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use crate::{Literal, test_util::{assert_parse_ok_eq, assert_roundtrip}};
use super::CharLit;
// ===== Utility functions =======================================================================
macro_rules! check {
($lit:literal) => { check!($lit, stringify!($lit), "") };
($lit:literal, $input:expr, $suffix:literal) => {
let input = $input;
let expected = CharLit {
raw: input,
start_suffix: input.len() - $suffix.len(),
value: $lit,
};
assert_parse_ok_eq(input, CharLit::parse(input), expected.clone(), "CharLit::parse");
assert_parse_ok_eq(input, Literal::parse(input), Literal::Char(expected), "Literal::parse");
let lit = CharLit::parse(input).unwrap();
assert_eq!(lit.value(), $lit);
assert_eq!(lit.suffix(), $suffix);
assert_roundtrip(expected.to_owned(), input);
};
}
// ===== Actual tests ============================================================================
#[test]
fn alphanumeric() {
check!('a');
check!('b');
check!('y');
check!('z');
check!('A');
check!('B');
check!('Y');
check!('Z');
check!('0');
check!('1');
check!('8');
check!('9');
}
#[test]
fn special_chars() {
check!(' ');
check!('!');
check!('"');
check!('#');
check!('$');
check!('%');
check!('&');
check!('(');
check!(')');
check!('*');
check!('+');
check!(',');
check!('-');
check!('.');
check!('/');
check!(':');
check!(';');
check!('<');
check!('=');
check!('>');
check!('?');
check!('@');
check!('[');
check!(']');
check!('^');
check!('_');
check!('`');
check!('{');
check!('|');
check!('}');
check!('~');
}
#[test]
fn unicode() {
check!('న');
check!('犬');
check!('🦊');
}
#[test]
fn quote_escapes() {
check!('\'');
check!('\"');
}
#[test]
fn ascii_escapes() {
check!('\n');
check!('\r');
check!('\t');
check!('\\');
check!('\0');
check!('\x00');
check!('\x01');
check!('\x0c');
check!('\x0D');
check!('\x13');
check!('\x30');
check!('\x30');
check!('\x4B');
check!('\x6b');
check!('\x7F');
check!('\x7f');
}
#[test]
fn unicode_escapes() {
check!('\u{0}');
check!('\u{00}');
check!('\u{b}');
check!('\u{B}');
check!('\u{7e}');
check!('\u{E4}');
check!('\u{e4}');
check!('\u{fc}');
check!('\u{Fc}');
check!('\u{fC}');
check!('\u{FC}');
check!('\u{b10}');
check!('\u{B10}');
check!('\u{0b10}');
check!('\u{2764}');
check!('\u{1f602}');
check!('\u{1F602}');
check!('\u{0}');
check!('\u{0__}');
check!('\u{3_b}');
check!('\u{1_F_6_0_2}');
check!('\u{1_F6_02_____}');
}
#[test]
fn suffixes() {
check!('a', r##"'a'peter"##, "peter");
check!('#', r##"'#'peter"##, "peter");
check!('\n', r##"'\n'peter"##, "peter");
check!('\'', r##"'\''peter"##, "peter");
check!('\"', r##"'\"'peter"##, "peter");
}
#[test]
fn invald_ascii_escapes() {
assert_err!(CharLit, r"'\x80'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\x81'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\x8a'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\x8F'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xa0'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xB0'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xc3'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xDf'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xff'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xfF'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xFf'", NonAsciiXEscape, 1..5);
assert_err!(CharLit, r"'\xFF'", NonAsciiXEscape, 1..5);
}
#[test]
fn invalid_escapes() {
assert_err!(CharLit, r"'\a'", UnknownEscape, 1..3);
assert_err!(CharLit, r"'\y'", UnknownEscape, 1..3);
assert_err!(CharLit, r"'\", UnterminatedEscape, 1);
assert_err!(CharLit, r"'\x'", UnterminatedEscape, 1..4);
assert_err!(CharLit, r"'\x1'", InvalidXEscape, 1..5);
assert_err!(CharLit, r"'\xaj'", InvalidXEscape, 1..5);
assert_err!(CharLit, r"'\xjb'", InvalidXEscape, 1..5);
}
#[test]
fn invalid_unicode_escapes() {
assert_err!(CharLit, r"'\u'", UnicodeEscapeWithoutBrace, 1..3);
assert_err!(CharLit, r"'\u '", UnicodeEscapeWithoutBrace, 1..3);
assert_err!(CharLit, r"'\u3'", UnicodeEscapeWithoutBrace, 1..3);
assert_err!(CharLit, r"'\u{'", UnterminatedUnicodeEscape, 1..5);
assert_err!(CharLit, r"'\u{12'", UnterminatedUnicodeEscape, 1..7);
assert_err!(CharLit, r"'\u{a0b'", UnterminatedUnicodeEscape, 1..8);
assert_err!(CharLit, r"'\u{a0_b '", UnterminatedUnicodeEscape, 1..11);
assert_err!(CharLit, r"'\u{_}'", InvalidStartOfUnicodeEscape, 4);
assert_err!(CharLit, r"'\u{_5f}'", InvalidStartOfUnicodeEscape, 4);
assert_err!(CharLit, r"'\u{x}'", NonHexDigitInUnicodeEscape, 4);
assert_err!(CharLit, r"'\u{0x}'", NonHexDigitInUnicodeEscape, 5);
assert_err!(CharLit, r"'\u{3bx}'", NonHexDigitInUnicodeEscape, 6);
assert_err!(CharLit, r"'\u{3b_x}'", NonHexDigitInUnicodeEscape, 7);
assert_err!(CharLit, r"'\u{4x_}'", NonHexDigitInUnicodeEscape, 5);
assert_err!(CharLit, r"'\u{1234567}'", TooManyDigitInUnicodeEscape, 10);
assert_err!(CharLit, r"'\u{1234567}'", TooManyDigitInUnicodeEscape, 10);
assert_err!(CharLit, r"'\u{1_23_4_56_7}'", TooManyDigitInUnicodeEscape, 14);
assert_err!(CharLit, r"'\u{abcdef123}'", TooManyDigitInUnicodeEscape, 10);
assert_err!(CharLit, r"'\u{110000}'", InvalidUnicodeEscapeChar, 1..10);
}
#[test]
fn parse_err() {
assert_err!(CharLit, r"''", EmptyCharLiteral, None);
assert_err!(CharLit, r"' ''", UnexpectedChar, 3);
assert_err!(CharLit, r"'", UnterminatedCharLiteral, None);
assert_err!(CharLit, r"'a", UnterminatedCharLiteral, None);
assert_err!(CharLit, r"'\n", UnterminatedCharLiteral, None);
assert_err!(CharLit, r"'\x35", UnterminatedCharLiteral, None);
assert_err!(CharLit, r"'ab'", OverlongCharLiteral, None);
assert_err!(CharLit, r"'a _'", OverlongCharLiteral, None);
assert_err!(CharLit, r"'\n3'", OverlongCharLiteral, None);
assert_err!(CharLit, r"", Empty, None);
assert_err!(CharLit, r"'''", UnescapedSingleQuote, 1);
assert_err!(CharLit, r"''''", UnescapedSingleQuote, 1);
assert_err!(CharLit, "'\n'", UnescapedSpecialWhitespace, 1);
assert_err!(CharLit, "'\t'", UnescapedSpecialWhitespace, 1);
assert_err!(CharLit, "'\r'", UnescapedSpecialWhitespace, 1);
}