Rename "Function-like procedural macros" section

This renames this section to follow the attribute template. Although I
like the old title, since it describes what it does, I would prefer to
not make exceptions and stay consistent.

Author: ehuss

book.toml

@@ -35,6 +35,7 @@ use-boolean-and = true
 "/lifetime-elision.html#static-lifetime-elision" = "lifetime-elision.html#const-and-static-elision"
 "/macros-by-example.html#path-based-scope" = "macros-by-example.html#the-macro_export-attribute"
 "/procedural-macros.html#derive-macros" = "procedural-macros.html#the-proc_macro_derive-attribute"
+"/procedural-macros.html#function-like-procedural-macros" = "procedural-macros.html#the-proc_macro-attribute"
 "/runtime.html#the-panic_handler-attribute" = "panic.html#the-panic_handler-attribute"
 "/unsafe-blocks.html" = "unsafe-keyword.html"
 "/unsafe-functions.html" = "unsafe-keyword.html"

src/attributes.md

@@ -374,7 +374,7 @@ The following is an index of all built-in attributes.
 [`path`]: items/modules.md#the-path-attribute
 [`proc_macro_attribute`]: procedural-macros.md#attribute-macros
 [`proc_macro_derive`]: macro.proc.derive
-[`proc_macro`]: procedural-macros.md#function-like-procedural-macros
+[`proc_macro`]: procedural-macros.md#the-proc_macro-attribute
 [`recursion_limit`]: attributes/limits.md#the-recursion_limit-attribute
 [`repr`]: type-layout.md#representations
 [`should_panic`]: attributes/testing.md#the-should_panic-attribute

src/names/namespaces.md

@@ -153,7 +153,7 @@ It is still an error for a [`use` import] to shadow another macro, regardless of
 [field expression]: ../expressions/field-expr.md
 [Function declarations]: ../items/functions.md
 [function parameters]: ../items/functions.md#function-parameters
-[Function-like procedural macros]: ../procedural-macros.md#function-like-procedural-macros
+[Function-like procedural macros]: ../procedural-macros.md#the-proc_macro-attribute
 [Generic const parameters]: ../items/generics.md#const-generics
 [Generic lifetime parameters]: ../items/generics.md
 [Generic type parameters]: ../items/generics.md

src/procedural-macros.md

@@ -79,8 +79,9 @@ items in libraries (for example, `::std::option::Option` instead of `Option`) or
 by ensuring that generated functions have names that are unlikely to clash with
 other functions (like `__internal_foo` instead of `foo`).
 
-r[macro.proc.function]
-## Function-like procedural macros
+<!-- TODO: rule name needs improvement -->
+r[macro.proc.proc_macro]
+## The `proc_macro` attribute
 
 r[macro.proc.function.intro]
 *Function-like procedural macros* are procedural macros that are invoked using the macro invocation operator (`!`).
@@ -376,7 +377,7 @@ their equivalent `#[doc = r"str"]` attributes when passed to macros.
 [Attribute macros]: #attribute-macros
 [Cargo's build scripts]: ../cargo/reference/build-scripts.html
 [Derive macros]: macro.proc.derive
-[Function-like macros]: #function-like-procedural-macros
+[Function-like macros]: #the-proc_macro-attribute
 [`$crate`]: macro.decl.hygiene.crate
 [`Delimiter::None`]: proc_macro::Delimiter::None
 [`Group`]: proc_macro::Group