16806fc12c
## Motivation factorial dbg! example doesn't produce any stdout & is referencing tracing 0.1 crate ## Solution update to path reference & set fmt max level DEBUG: ``` $ cargo run --example factorial Jan 10 21:17:47.574 DEBUG factorial: n <= 1 value=false Jan 10 21:17:47.575 DEBUG factorial: n <= 1 value=false ... ```
20 lines
456 B
Rust
20 lines
456 B
Rust
//! Compare to the example given in the documentation for the `std::dbg` macro.
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#![deny(rust_2018_idioms)]
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use tracing_macros::dbg;
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fn factorial(n: u32) -> u32 {
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if dbg!(n <= 1) {
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dbg!(1)
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} else {
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dbg!(n * factorial(n - 1))
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}
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}
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fn main() {
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let collector = tracing_subscriber::fmt()
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.with_max_level(tracing::Level::DEBUG)
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.finish();
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tracing::collect::with_default(collector, || dbg!(factorial(4)));
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}
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