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Ch. 20: correct listing number #4287

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Mar 20, 2025
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Ch. 20: correct listing number #4287

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4 changes: 2 additions & 2 deletions src/ch20-05-macros.md
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Expand Up @@ -323,10 +323,10 @@ The `hello_macro_derive` function first converts the `input` from a
`TokenStream` to a data structure that we can then interpret and perform
operations on. This is where `syn` comes into play. The `parse` function in
`syn` takes a `TokenStream` and returns a `DeriveInput` struct representing the
parsed Rust code. Listing 20-40 shows the relevant parts of the `DeriveInput`
parsed Rust code. Listing 20-41 shows the relevant parts of the `DeriveInput`
struct we get from parsing the `struct Pancakes;` string.

<Listing number="20-40" caption="The `DeriveInput` instance we get when parsing the code that has the macro’s attribute in Listing 20-37">
<Listing number="20-41" caption="The `DeriveInput` instance we get when parsing the code that has the macro’s attribute in Listing 20-37">

```rust,ignore
DeriveInput {
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