feat: initial nuwiki Rust workspace (core, lsp, ls)

crates/nuwiki-core/src/ast/mod.rs

@@ -0,0 +1,54 @@
+//! AST types for nuwiki documents.
+//!
+//! Types here are syntax-agnostic — both vimwiki and (eventually) markdown
+//! produce the same node shapes.
+
+pub mod block;
+pub mod inline;
+pub mod link;
+pub mod span;
+pub mod visit;
+
+pub use block::{
+    BlockNode, BlockquoteNode, CheckboxState, CommentNode, DefinitionItemNode, DefinitionListNode,
+    ErrorNode, HeadingNode, HorizontalRuleNode, ListItemNode, ListNode, ListSymbol, MathBlockNode,
+    ParagraphNode, PreformattedNode, TableAlign, TableCellNode, TableNode, TableRowNode, TagNode,
+    TagScope,
+};
+pub use inline::{
+    inline_text, BoldItalicNode, BoldNode, CodeNode, ColorNode, InlineNode, ItalicNode, Keyword,
+    KeywordNode, MathInlineNode, SoftBreakNode, StrikethroughNode, SubscriptNode, SuperscriptNode,
+    TextNode,
+};
+pub use link::{
+    ExternalLinkNode, LinkKind, LinkTarget, RawUrlNode, TransclusionNode, WikiLinkNode,
+};
+pub use span::{Position, Span};
+pub use visit::{
+    walk_block, walk_definition_item, walk_document, walk_inline, walk_list, walk_list_item,
+    walk_table, walk_table_row, Visitor,
+};
+
+/// Root of an AST.
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct DocumentNode {
+    pub span: Span,
+    pub children: Vec<BlockNode>,
+    pub metadata: PageMetadata,
+}
+
+/// Document-level placeholders parsed from `%title` / `%nohtml` / `%template`
+/// / `%date` directives, plus the file-level tag accumulator.
+///
+/// New fields are added at the bottom; consumers should construct with
+/// `..Default::default()` to stay forward-compatible.
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct PageMetadata {
+    pub title: Option<String>,
+    pub nohtml: bool,
+    pub template: Option<String>,
+    pub date: Option<String>,
+    /// File-scope tags parsed by the tag lexer. Convenience
+    /// projection of the `BlockNode::Tag` nodes whose scope is `File`.
+    pub tags: Vec<String>,
+}