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-rw-r--r--third_party/rust/litrs/src/integer/tests.rs357
1 files changed, 357 insertions, 0 deletions
diff --git a/third_party/rust/litrs/src/integer/tests.rs b/third_party/rust/litrs/src/integer/tests.rs
new file mode 100644
index 0000000000..e6dad3f031
--- /dev/null
+++ b/third_party/rust/litrs/src/integer/tests.rs
@@ -0,0 +1,357 @@
+use std::fmt::{Debug, Display};
+use crate::{
+ FromIntegerLiteral, Literal, IntegerLit, IntegerType as Ty, IntegerBase, IntegerBase::*,
+ test_util::{assert_parse_ok_eq, assert_roundtrip},
+};
+
+
+// ===== Utility functions =======================================================================
+
+#[track_caller]
+fn check<T: FromIntegerLiteral + PartialEq + Debug + Display>(
+ input: &str,
+ value: T,
+ base: IntegerBase,
+ main_part: &str,
+ type_suffix: Option<Ty>,
+) {
+ let expected_integer = IntegerLit {
+ raw: input,
+ start_main_part: base.prefix().len(),
+ end_main_part: base.prefix().len() + main_part.len(),
+ base,
+ };
+ assert_parse_ok_eq(
+ input, IntegerLit::parse(input), expected_integer.clone(), "IntegerLit::parse");
+ assert_parse_ok_eq(
+ input, Literal::parse(input), Literal::Integer(expected_integer), "Literal::parse");
+ assert_roundtrip(expected_integer.to_owned(), input);
+ assert_eq!(Ty::from_suffix(IntegerLit::parse(input).unwrap().suffix()), type_suffix);
+
+ let actual_value = IntegerLit::parse(input)
+ .unwrap()
+ .value::<T>()
+ .unwrap_or_else(|| panic!("unexpected overflow in `IntegerLit::value` for `{}`", input));
+ if actual_value != value {
+ panic!(
+ "Parsing int literal `{}` should give value `{}`, but actually resulted in `{}`",
+ input,
+ value,
+ actual_value,
+ );
+ }
+}
+
+
+// ===== Actual tests ===========================================================================
+
+#[test]
+fn parse_decimal() {
+ check("0", 0u128, Decimal, "0", None);
+ check("1", 1u8, Decimal, "1", None);
+ check("8", 8u16, Decimal, "8", None);
+ check("9", 9u32, Decimal, "9", None);
+ check("10", 10u64, Decimal, "10", None);
+ check("11", 11i8, Decimal, "11", None);
+ check("123456789", 123456789i128, Decimal, "123456789", None);
+
+ check("05", 5i16, Decimal, "05", None);
+ check("00005", 5i32, Decimal, "00005", None);
+ check("0123456789", 123456789i64, Decimal, "0123456789", None);
+
+ check("123_456_789", 123_456_789, Decimal, "123_456_789", None);
+ check("0___4", 4, Decimal, "0___4", None);
+ check("0___4_3", 43, Decimal, "0___4_3", None);
+ check("0___4_3", 43, Decimal, "0___4_3", None);
+ check("123___________", 123, Decimal, "123___________", None);
+
+ check(
+ "340282366920938463463374607431768211455",
+ 340282366920938463463374607431768211455u128,
+ Decimal,
+ "340282366920938463463374607431768211455",
+ None,
+ );
+ check(
+ "340_282_366_920_938_463_463_374_607_431_768_211_455",
+ 340282366920938463463374607431768211455u128,
+ Decimal,
+ "340_282_366_920_938_463_463_374_607_431_768_211_455",
+ None,
+ );
+ check(
+ "3_40_282_3669_20938_463463_3746074_31768211_455___",
+ 340282366920938463463374607431768211455u128,
+ Decimal,
+ "3_40_282_3669_20938_463463_3746074_31768211_455___",
+ None,
+ );
+}
+
+#[test]
+fn parse_binary() {
+ check("0b0", 0b0, Binary, "0", None);
+ check("0b000", 0b000, Binary, "000", None);
+ check("0b1", 0b1, Binary, "1", None);
+ check("0b01", 0b01, Binary, "01", None);
+ check("0b101010", 0b101010, Binary, "101010", None);
+ check("0b10_10_10", 0b10_10_10, Binary, "10_10_10", None);
+ check("0b01101110____", 0b01101110____, Binary, "01101110____", None);
+
+ check("0b10010u8", 0b10010u8, Binary, "10010", Some(Ty::U8));
+ check("0b10010i8", 0b10010u8, Binary, "10010", Some(Ty::I8));
+ check("0b10010u64", 0b10010u64, Binary, "10010", Some(Ty::U64));
+ check("0b10010i64", 0b10010i64, Binary, "10010", Some(Ty::I64));
+ check(
+ "0b1011001_00110000_00101000_10100101u32",
+ 0b1011001_00110000_00101000_10100101u32,
+ Binary,
+ "1011001_00110000_00101000_10100101",
+ Some(Ty::U32),
+ );
+}
+
+#[test]
+fn parse_octal() {
+ check("0o0", 0o0, Octal, "0", None);
+ check("0o1", 0o1, Octal, "1", None);
+ check("0o6", 0o6, Octal, "6", None);
+ check("0o7", 0o7, Octal, "7", None);
+ check("0o17", 0o17, Octal, "17", None);
+ check("0o123", 0o123, Octal, "123", None);
+ check("0o7654321", 0o7654321, Octal, "7654321", None);
+ check("0o7_53_1", 0o7_53_1, Octal, "7_53_1", None);
+ check("0o66_", 0o66_, Octal, "66_", None);
+
+ check("0o755u16", 0o755u16, Octal, "755", Some(Ty::U16));
+ check("0o755i128", 0o755i128, Octal, "755", Some(Ty::I128));
+}
+
+#[test]
+fn parse_hexadecimal() {
+ check("0x0", 0x0, Hexadecimal, "0", None);
+ check("0x1", 0x1, Hexadecimal, "1", None);
+ check("0x9", 0x9, Hexadecimal, "9", None);
+
+ check("0xa", 0xa, Hexadecimal, "a", None);
+ check("0xf", 0xf, Hexadecimal, "f", None);
+ check("0x17", 0x17, Hexadecimal, "17", None);
+ check("0x1b", 0x1b, Hexadecimal, "1b", None);
+ check("0x123", 0x123, Hexadecimal, "123", None);
+ check("0xace", 0xace, Hexadecimal, "ace", None);
+ check("0xfdb971", 0xfdb971, Hexadecimal, "fdb971", None);
+ check("0xa_54_f", 0xa_54_f, Hexadecimal, "a_54_f", None);
+ check("0x6d_", 0x6d_, Hexadecimal, "6d_", None);
+
+ check("0xA", 0xA, Hexadecimal, "A", None);
+ check("0xF", 0xF, Hexadecimal, "F", None);
+ check("0x17", 0x17, Hexadecimal, "17", None);
+ check("0x1B", 0x1B, Hexadecimal, "1B", None);
+ check("0x123", 0x123, Hexadecimal, "123", None);
+ check("0xACE", 0xACE, Hexadecimal, "ACE", None);
+ check("0xFDB971", 0xFDB971, Hexadecimal, "FDB971", None);
+ check("0xA_54_F", 0xA_54_F, Hexadecimal, "A_54_F", None);
+ check("0x6D_", 0x6D_, Hexadecimal, "6D_", None);
+
+ check("0xFdB97a1", 0xFdB97a1, Hexadecimal, "FdB97a1", None);
+ check("0xfdB97A1", 0xfdB97A1, Hexadecimal, "fdB97A1", None);
+
+ check("0x40u16", 0x40u16, Hexadecimal, "40", Some(Ty::U16));
+ check("0xffi128", 0xffi128, Hexadecimal, "ff", Some(Ty::I128));
+}
+
+#[test]
+fn starting_underscore() {
+ check("0b_1", 1, Binary, "_1", None);
+ check("0b_010i16", 0b_010, Binary, "_010", Some(Ty::I16));
+
+ check("0o_5", 5, Octal, "_5", None);
+ check("0o_750u128", 0o_750u128, Octal, "_750", Some(Ty::U128));
+
+ check("0x_c", 0xc, Hexadecimal, "_c", None);
+ check("0x_cf3i8", 0x_cf3, Hexadecimal, "_cf3", Some(Ty::I8));
+}
+
+#[test]
+fn parse_overflowing_just_fine() {
+ check("256u8", 256u16, Decimal, "256", Some(Ty::U8));
+ check("123_456_789u8", 123_456_789u32, Decimal, "123_456_789", Some(Ty::U8));
+ check("123_456_789u16", 123_456_789u32, Decimal, "123_456_789", Some(Ty::U16));
+
+ check("123_123_456_789u8", 123_123_456_789u64, Decimal, "123_123_456_789", Some(Ty::U8));
+ check("123_123_456_789u16", 123_123_456_789u64, Decimal, "123_123_456_789", Some(Ty::U16));
+ check("123_123_456_789u32", 123_123_456_789u64, Decimal, "123_123_456_789", Some(Ty::U32));
+}
+
+#[test]
+fn suffixes() {
+ [
+ ("123i8", Ty::I8),
+ ("123i16", Ty::I16),
+ ("123i32", Ty::I32),
+ ("123i64", Ty::I64),
+ ("123i128", Ty::I128),
+ ("123u8", Ty::U8),
+ ("123u16", Ty::U16),
+ ("123u32", Ty::U32),
+ ("123u64", Ty::U64),
+ ("123u128", Ty::U128),
+ ].iter().for_each(|&(s, ty)| {
+ assert_eq!(Ty::from_suffix(IntegerLit::parse(s).unwrap().suffix()), Some(ty));
+ });
+}
+
+#[test]
+fn overflow_u128() {
+ let inputs = [
+ "340282366920938463463374607431768211456",
+ "0x100000000000000000000000000000000",
+ "0o4000000000000000000000000000000000000000000",
+ "0b1000000000000000000000000000000000000000000000000000000000000000000\
+ 00000000000000000000000000000000000000000000000000000000000000",
+ "340282366920938463463374607431768211456u128",
+ "340282366920938463463374607431768211457",
+ "3_40_282_3669_20938_463463_3746074_31768211_456___",
+ "3_40_282_3669_20938_463463_3746074_31768211_455___1",
+ "3_40_282_3669_20938_463463_3746074_31768211_455___0u128",
+ "3402823669209384634633746074317682114570",
+ ];
+
+ for &input in &inputs {
+ let lit = IntegerLit::parse(input).expect("failed to parse");
+ assert!(lit.value::<u128>().is_none());
+ }
+}
+
+#[test]
+fn overflow_u8() {
+ let inputs = [
+ "256", "0x100", "0o400", "0b100000000",
+ "257", "0x101", "0o401", "0b100000001",
+ "300",
+ "1548",
+ "2548985",
+ "256u128",
+ "256u8",
+ "2_5_6",
+ "256_____1",
+ "256__",
+ ];
+
+ for &input in &inputs {
+ let lit = IntegerLit::parse(input).expect("failed to parse");
+ assert!(lit.value::<u8>().is_none());
+ }
+}
+
+#[test]
+fn parse_err() {
+ assert_err!(IntegerLit, "", Empty, None);
+ assert_err_single!(IntegerLit::parse("a"), DoesNotStartWithDigit, 0);
+ assert_err_single!(IntegerLit::parse(";"), DoesNotStartWithDigit, 0);
+ assert_err_single!(IntegerLit::parse("0;"), UnexpectedChar, 1..2);
+ assert_err!(IntegerLit, "0b", NoDigits, 2..2);
+ assert_err_single!(IntegerLit::parse(" 0"), DoesNotStartWithDigit, 0);
+ assert_err_single!(IntegerLit::parse("0 "), UnexpectedChar, 1);
+ assert_err!(IntegerLit, "0b3", InvalidDigit, 2);
+ assert_err_single!(IntegerLit::parse("_"), DoesNotStartWithDigit, 0);
+ assert_err_single!(IntegerLit::parse("_3"), DoesNotStartWithDigit, 0);
+ assert_err!(IntegerLit, "0x44.5", UnexpectedChar, 4..6);
+ assert_err_single!(IntegerLit::parse("123em"), IntegerSuffixStartingWithE, 3);
+}
+
+#[test]
+fn invalid_digits() {
+ assert_err!(IntegerLit, "0b10201", InvalidDigit, 4);
+ assert_err!(IntegerLit, "0b9", InvalidDigit, 2);
+ assert_err!(IntegerLit, "0b07", InvalidDigit, 3);
+
+ assert_err!(IntegerLit, "0o12380", InvalidDigit, 5);
+ assert_err!(IntegerLit, "0o192", InvalidDigit, 3);
+
+ assert_err_single!(IntegerLit::parse("a_123"), DoesNotStartWithDigit, 0);
+ assert_err_single!(IntegerLit::parse("B_123"), DoesNotStartWithDigit, 0);
+}
+
+#[test]
+fn no_valid_digits() {
+ assert_err!(IntegerLit, "0x_", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0x__", NoDigits, 2..4);
+ assert_err!(IntegerLit, "0x________", NoDigits, 2..10);
+ assert_err!(IntegerLit, "0x_i8", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0x_u8", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0x_isize", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0x_usize", NoDigits, 2..3);
+
+ assert_err!(IntegerLit, "0o_", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0o__", NoDigits, 2..4);
+ assert_err!(IntegerLit, "0o________", NoDigits, 2..10);
+ assert_err!(IntegerLit, "0o_i32", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0o_u32", NoDigits, 2..3);
+
+ assert_err!(IntegerLit, "0b_", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0b__", NoDigits, 2..4);
+ assert_err!(IntegerLit, "0b________", NoDigits, 2..10);
+ assert_err!(IntegerLit, "0b_i128", NoDigits, 2..3);
+ assert_err!(IntegerLit, "0b_u128", NoDigits, 2..3);
+}
+
+#[test]
+fn non_standard_suffixes() {
+ #[track_caller]
+ fn check_suffix<T: FromIntegerLiteral + PartialEq + Debug + Display>(
+ input: &str,
+ value: T,
+ base: IntegerBase,
+ main_part: &str,
+ suffix: &str,
+ ) {
+ check(input, value, base, main_part, None);
+ assert_eq!(IntegerLit::parse(input).unwrap().suffix(), suffix);
+ }
+
+ check_suffix("5u7", 5, Decimal, "5", "u7");
+ check_suffix("5u7", 5, Decimal, "5", "u7");
+ check_suffix("5u9", 5, Decimal, "5", "u9");
+ check_suffix("5u0", 5, Decimal, "5", "u0");
+ check_suffix("33u12", 33, Decimal, "33", "u12");
+ check_suffix("84u17", 84, Decimal, "84", "u17");
+ check_suffix("99u80", 99, Decimal, "99", "u80");
+ check_suffix("1234uu16", 1234, Decimal, "1234", "uu16");
+
+ check_suffix("5i7", 5, Decimal, "5", "i7");
+ check_suffix("5i9", 5, Decimal, "5", "i9");
+ check_suffix("5i0", 5, Decimal, "5", "i0");
+ check_suffix("33i12", 33, Decimal, "33", "i12");
+ check_suffix("84i17", 84, Decimal, "84", "i17");
+ check_suffix("99i80", 99, Decimal, "99", "i80");
+ check_suffix("1234ii16", 1234, Decimal, "1234", "ii16");
+
+ check_suffix("0ui32", 0, Decimal, "0", "ui32");
+ check_suffix("1iu32", 1, Decimal, "1", "iu32");
+ check_suffix("54321a64", 54321, Decimal, "54321", "a64");
+ check_suffix("54321b64", 54321, Decimal, "54321", "b64");
+ check_suffix("54321x64", 54321, Decimal, "54321", "x64");
+ check_suffix("54321o64", 54321, Decimal, "54321", "o64");
+
+ check_suffix("0a", 0, Decimal, "0", "a");
+ check_suffix("0a3", 0, Decimal, "0", "a3");
+ check_suffix("0z", 0, Decimal, "0", "z");
+ check_suffix("0z3", 0, Decimal, "0", "z3");
+ check_suffix("0b0a", 0, Binary, "0", "a");
+ check_suffix("0b0A", 0, Binary, "0", "A");
+ check_suffix("0b01f", 1, Binary, "01", "f");
+ check_suffix("0b01F", 1, Binary, "01", "F");
+ check_suffix("0o7a_", 7, Octal, "7", "a_");
+ check_suffix("0o7A_", 7, Octal, "7", "A_");
+ check_suffix("0o72f_0", 0o72, Octal, "72", "f_0");
+ check_suffix("0o72F_0", 0o72, Octal, "72", "F_0");
+
+ check_suffix("0x8cg", 0x8c, Hexadecimal, "8c", "g");
+ check_suffix("0x8cG", 0x8c, Hexadecimal, "8c", "G");
+ check_suffix("0x8c1h_", 0x8c1, Hexadecimal, "8c1", "h_");
+ check_suffix("0x8c1H_", 0x8c1, Hexadecimal, "8c1", "H_");
+ check_suffix("0x8czu16", 0x8c, Hexadecimal, "8c", "zu16");
+
+ check_suffix("123_foo", 123, Decimal, "123_", "foo");
+}
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