1 files changed, 15 insertions, 13 deletions

diff --git a/syntax/error.rs b/syntax/error.rs
index f40c4a8e..4487693c 100644
--- a/syntax/error.rs
+++ b/syntax/error.rs
@@ -1,9 +1,11 @@
 use std::fmt::{self, Display};
 
 #[derive(Copy, Clone)]
-pub struct Error {
+pub(crate) struct Error {
     pub msg: &'static str,
+    #[allow(dead_code)] // only used by cxx-build, not cxxbridge-macro
     pub label: Option<&'static str>,
+    #[allow(dead_code)] // only used by cxx-build, not cxxbridge-macro
     pub note: Option<&'static str>,
 }
 
@@ -13,7 +15,7 @@ impl Display for Error {
     }
 }
 
-pub static ERRORS: &[Error] = &[
+pub(crate) static ERRORS: &[Error] = &[
     BOX_CXX_TYPE,
     CXXBRIDGE_RESERVED,
     CXX_STRING_BY_VALUE,
@@ -27,67 +29,67 @@ pub static ERRORS: &[Error] = &[
     USE_NOT_ALLOWED,
 ];
 
-pub static BOX_CXX_TYPE: Error = Error {
+pub(crate) static BOX_CXX_TYPE: Error = Error {
     msg: "Box of a C++ type is not supported yet",
     label: None,
     note: Some("hint: use UniquePtr<> or SharedPtr<>"),
 };
 
-pub static CXXBRIDGE_RESERVED: Error = Error {
+pub(crate) static CXXBRIDGE_RESERVED: Error = Error {
     msg: "identifiers starting with cxxbridge are reserved",
     label: Some("reserved identifier"),
     note: Some("identifiers starting with cxxbridge are reserved"),
 };
 
-pub static CXX_STRING_BY_VALUE: Error = Error {
+pub(crate) static CXX_STRING_BY_VALUE: Error = Error {
     msg: "C++ string by value is not supported",
     label: None,
     note: Some("hint: wrap it in a UniquePtr<>"),
 };
 
-pub static CXX_TYPE_BY_VALUE: Error = Error {
+pub(crate) static CXX_TYPE_BY_VALUE: Error = Error {
     msg: "C++ type by value is not supported",
     label: None,
     note: Some("hint: wrap it in a UniquePtr<> or SharedPtr<>"),
 };
 
-pub static DISCRIMINANT_OVERFLOW: Error = Error {
+pub(crate) static DISCRIMINANT_OVERFLOW: Error = Error {
     msg: "discriminant overflow on value after ",
     label: Some("discriminant overflow"),
     note: Some("note: explicitly set `= 0` if that is desired outcome"),
 };
 
-pub static DOT_INCLUDE: Error = Error {
+pub(crate) static DOT_INCLUDE: Error = Error {
     msg: "#include relative to `.` or `..` is not supported in Cargo builds",
     label: Some("#include relative to `.` or `..` is not supported in Cargo builds"),
     note: Some("note: use a path starting with the crate name"),
 };
 
-pub static DOUBLE_UNDERSCORE: Error = Error {
+pub(crate) static DOUBLE_UNDERSCORE: Error = Error {
     msg: "identifiers containing double underscore are reserved in C++",
     label: Some("reserved identifier"),
     note: Some("identifiers containing double underscore are reserved in C++"),
 };
 
-pub static RESERVED_LIFETIME: Error = Error {
+pub(crate) static RESERVED_LIFETIME: Error = Error {
     msg: "invalid lifetime parameter name: `'static`",
     label: Some("'static is a reserved lifetime name"),
     note: None,
 };
 
-pub static RUST_TYPE_BY_VALUE: Error = Error {
+pub(crate) static RUST_TYPE_BY_VALUE: Error = Error {
     msg: "opaque Rust type by value is not supported",
     label: None,
     note: Some("hint: wrap it in a Box<>"),
 };
 
-pub static UNSUPPORTED_TYPE: Error = Error {
+pub(crate) static UNSUPPORTED_TYPE: Error = Error {
     msg: "unsupported type: ",
     label: Some("unsupported type"),
     note: None,
 };
 
-pub static USE_NOT_ALLOWED: Error = Error {
+pub(crate) static USE_NOT_ALLOWED: Error = Error {
     msg: "`use` items are not allowed within cxx bridge",
     label: Some("not allowed"),
     note: Some(