Only trigger for one level of macros

clippy_lints/src/nonstandard_macro_braces.rs

@@ -94,7 +94,8 @@ impl EarlyLintPass for MacroBraces {
 
 fn is_offending_macro<'a>(cx: &EarlyContext<'_>, span: Span, mac_braces: &'a MacroBraces) -> Option<MacroInfo<'a>> {
     if_chain! {
-        if in_macro(span);
+        // Make sure we are only one level deep otherwise there are to many FP's
+        if in_macro(span) && !in_macro(span.ctxt().outer_expn_data().call_site);
         if let Some((name, braces)) = find_matching_macro(span, &mac_braces.macro_braces);
         if let Some(snip) = snippet_opt(cx, span.ctxt().outer_expn_data().call_site);
         // we must check only invocation sites

tests/ui-toml/nonstandard_macro_braces/clippy.toml

@@ -3,5 +3,4 @@ standard-macro-braces = [
     { name = "quote::quote", brace = "{" },
     { name = "eprint", brace = "[" },
     { name = "type_pos", brace = "[" },
-    { name = "printlnfoo", brace = "[" },
 ]

tests/ui-toml/nonstandard_macro_braces/conf_nonstandard_macro_braces.rs

@@ -34,7 +34,7 @@ macro_rules! type_pos {
 
 macro_rules! printlnfoo {
     ($thing:expr) => {
-        println!("hey {}", $thing)
+        println!("{}", $thing)
     };
 }
 
@@ -44,7 +44,7 @@ fn main() {
     let _ = format!["ugh {} stop being such a good compiler", "hello"];
     let _ = quote!(let x = 1;);
     let _ = quote::quote!(match match match);
-    let _ = test!();
+    let _ = test!(); // don't trigger for macro calls inside macros
     let _ = vec![1,2,3];
 
     let _ = quote::quote! {true || false};
@@ -56,7 +56,5 @@ fn main() {
 
     eprint!("test if user config overrides defaults");
 
-    println!("test if println triggers for printlnfoo");
-
-    printlnfoo!("you");
+    printlnfoo!["test if printlnfoo is triggered by println"];
 }

tests/ui-toml/nonstandard_macro_braces/conf_nonstandard_macro_braces.stderr

@@ -47,25 +47,6 @@ help: consider writing `quote::quote! {match match match}`
 LL |     let _ = quote::quote!(match match match);
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: use of irregular braces for `vec!` macro
-  --> $DIR/conf_nonstandard_macro_braces.rs:18:9
-   |
-LL |         vec!{0, 0, 0}
-   |         ^^^^^^^^^^^^^
-...
-LL |     let _ = test!();
-   |             ------- in this macro invocation
-   |
-help: consider writing `vec![0, 0, 0]`
-  --> $DIR/conf_nonstandard_macro_braces.rs:18:9
-   |
-LL |         vec!{0, 0, 0}
-   |         ^^^^^^^^^^^^^
-...
-LL |     let _ = test!();
-   |             ------- in this macro invocation
-   = note: this error originates in the macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
-
 error: use of irregular braces for `type_pos!` macro
   --> $DIR/conf_nonstandard_macro_braces.rs:55:12
    |
@@ -90,17 +71,5 @@ help: consider writing `eprint!["test if user config overrides defaults"];`
 LL |     eprint!("test if user config overrides defaults");
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: use of irregular braces for `printlnfoo!` macro
-  --> $DIR/conf_nonstandard_macro_braces.rs:61:5
-   |
-LL |     printlnfoo!("you");
-   |     ^^^^^^^^^^^^^^^^^^^
-   |
-help: consider writing `printlnfoo!["you"];`
-  --> $DIR/conf_nonstandard_macro_braces.rs:61:5
-   |
-LL |     printlnfoo!("you");
-   |     ^^^^^^^^^^^^^^^^^^^
-
-error: aborting due to 8 previous errors
+error: aborting due to 6 previous errors