Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/third_party/rust/bindgen/parse.rs b/third_party/rust/bindgen/parse.rs
new file mode 100644
index 0000000000..1fd83cddda
--- /dev/null
+++ b/third_party/rust/bindgen/parse.rs
@@ -0,0 +1,40 @@
+//! Common traits and types related to parsing our IR from Clang cursors.
+
+use crate::clang;
+use crate::ir::context::{BindgenContext, ItemId};
+
+/// Not so much an error in the traditional sense, but a control flow message
+/// when walking over Clang's AST with a cursor.
+#[derive(Debug)]
+pub enum ParseError {
+    /// Recurse down the current AST node's children.
+    Recurse,
+    /// Continue on to the next sibling AST node, or back up to the parent's
+    /// siblings if we've exhausted all of this node's siblings (and so on).
+    Continue,
+}
+
+/// The result of parsing a Clang AST node.
+#[derive(Debug)]
+pub enum ParseResult<T> {
+    /// We've already resolved this item before, here is the extant `ItemId` for
+    /// it.
+    AlreadyResolved(ItemId),
+
+    /// This is a newly parsed item. If the cursor is `Some`, it points to the
+    /// AST node where the new `T` was declared.
+    New(T, Option<clang::Cursor>),
+}
+
+/// An intermediate representation "sub-item" (i.e. one of the types contained
+/// inside an `ItemKind` variant) that can be parsed from a Clang cursor.
+pub trait ClangSubItemParser: Sized {
+    /// Attempt to parse this type from the given cursor.
+    ///
+    /// The fact that is a reference guarantees it's held by the context, and
+    /// allow returning already existing types.
+    fn parse(
+        cursor: clang::Cursor,
+        context: &mut BindgenContext,
+    ) -> Result<ParseResult<Self>, ParseError>;
+}