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diff --git a/src/doc/book/redirects/casting-between-types.md b/src/doc/book/redirects/casting-between-types.md new file mode 100644 index 000000000..7e1eb7744 --- /dev/null +++ b/src/doc/book/redirects/casting-between-types.md @@ -0,0 +1,32 @@ +% Casting between types + +<small>There is a new edition of the book and this is an old link.</small> + +> A type cast expression is denoted with the binary operator `as`. +> Executing an `as` expression casts the value on the left-hand side to the type on the right-hand side. + +```rust +# fn sum(values: &[f64]) -> f64 { 0.0 } +# fn len(values: &[f64]) -> i32 { 0 } + +fn average(values: &[f64]) -> f64 { + let sum: f64 = sum(values); + let size: f64 = len(values) as f64; + sum / size +} +``` + +--- + +Here are the relevant sections in the new and old books: + +* **[in the current edition: Appendix A — Keywords][2]** +* [In the Rust Reference: Type Cast Expressions][3] +* [In the Rust documentation: `mem::transmute`][4] +* <small>[In the first edition: Ch 3.29 — Casting between types][1]</small> + + +[1]: https://doc.rust-lang.org/1.30.0/book/first-edition/casting-between-types.html +[2]: appendix-01-keywords.html +[3]: ../reference/expressions/operator-expr.html#type-cast-expressions +[4]: ../std/mem/fn.transmute.html
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