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