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Merge pull request #7837 from sargas/add-indexing-to-printf

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printf: Add indexing to format strings
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Sylvestre Ledru 2025-04-25 23:58:01 +02:00 • committed by GitHub
commit 606c0c1f57
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6 changed files with 568 additions and 127 deletions
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46
tests/by-util/test_printf.rs
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@ -1281,7 +1281,7 @@ fn float_arg_with_whitespace() {
.fails()
.stderr_contains("expected a numeric value");
// A input string with a whitespace special character that has
// An input string with a whitespace special character that has
// not already been expanded should fail.
new_ucmd!()
.args(&["%f", "\\t0.1"])
@ -1313,3 +1313,47 @@ fn mb_input() {
.stderr_is(format!("printf: warning: {expected}: character(s) following character constant have been ignored\n"));
}
}
#[test]
fn positional_format_specifiers() {
new_ucmd!()
.args(&["%1$d%d-", "5", "10", "6", "20"])
.succeeds()
.stdout_only("55-1010-66-2020-");
new_ucmd!()
.args(&["%2$d%d-", "5", "10", "6", "20"])
.succeeds()
.stdout_only("105-206-");
new_ucmd!()
.args(&["%3$d%d-", "5", "10", "6", "20"])
.succeeds()
.stdout_only("65-020-");
new_ucmd!()
.args(&["%4$d%d-", "5", "10", "6", "20"])
.succeeds()
.stdout_only("205-");
new_ucmd!()
.args(&["%5$d%d-", "5", "10", "6", "20"])
.succeeds()
.stdout_only("05-");
new_ucmd!()
.args(&[
"Octal: %6$o, Int: %1$d, Float: %4$f, String: %2$s, Hex: %7$x, Scientific: %5$e, Char: %9$c, Unsigned: %3$u, Integer: %8$i",
"42", // 1$d - Int
"hello", // 2$s - String
"100", // 3$u - Unsigned
"3.14159", // 4$f - Float
"0.00001", // 5$e - Scientific
"77", // 6$o - Octal
"255", // 7$x - Hex
"123", // 8$i - Integer
"A", // 9$c - Char
])
.succeeds()
.stdout_only("Octal: 115, Int: 42, Float: 3.141590, String: hello, Hex: ff, Scientific: 1.000000e-05, Char: A, Unsigned: 100, Integer: 123");
}