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std::fmt: Added argument index comments to examples for specifying precision

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The examples for specifying the precision have comments explaining which
argument the specifier is referring to. However, for implicit positional
arguments, the examples simply talk about "next arg". To make it easier for
readers to follow the comments, "next arg" was supplemented with the actual
resulting argument index.
This commit is contained in:
Elias Holzmann 2022-04-30 02:39:27 +02:00
parent 1288883932
commit afd80a21b0
1 changed files with 6 additions and 6 deletions
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12
library/alloc/src/fmt.rs
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@ -240,19 +240,19 @@
//! // Hello {arg 0 ("x")} is {arg 2 (0.01) with precision specified in arg 1 (5)}
//! println!("Hello {0} is {2:.1$}", "x", 5, 0.01);
//!
//! // Hello {next arg ("x")} is {second of next two args (0.01) with precision
//! // specified in first of next two args (5)}
//! // Hello {next arg -> arg 0 ("x")} is {second of next two args -> arg 2 (0.01) with precision
//! // specified in first of next two args -> arg 1 (5)}
//! println!("Hello {} is {:.*}", "x", 5, 0.01);
//!
//! // Hello {arg 1 ("x")} is {arg 2 (0.01) with precision
//! // specified in next arg (5)}
//! // specified in next arg -> arg 0 (5)}
//! println!("Hello {1} is {2:.*}", 5, "x", 0.01);
//!
//! // Hello {next arg ("x")} is {arg 2 (0.01) with precision
//! // specified in next arg (5)}
//! // Hello {next arg -> arg 0 ("x")} is {arg 2 (0.01) with precision
//! // specified in next arg -> arg 1 (5)}
//! println!("Hello {} is {2:.*}", "x", 5, 0.01);
//!
//! // Hello {next arg ("x")} is {arg "number" (0.01) with precision specified
//! // Hello {next arg -> arg 0 ("x")} is {arg "number" (0.01) with precision specified
//! // in arg "prec" (5)}
//! println!("Hello {} is {number:.prec$}", "x", prec = 5, number = 0.01);
//! ```