1 files changed, 43 insertions, 0 deletions
diff --git a/src/lsp/lsp_index.h b/src/lsp/lsp_index.h
new file mode 100644
index 0000000..f4aaf96
--- /dev/null
+++ b/src/lsp/lsp_index.h
@@ -0,0 +1,43 @@
+
+#ifndef LSP_INDEX_H
+#define LSP_INDEX_H
+
+#include "parser.h"
+
+typedef enum
+{
+    RANGE_DEFINITION,
+    RANGE_REFERENCE
+} RangeType;
+
+typedef struct LSPRange
+{
+    int start_line;
+    int start_col;
+    int end_line;
+    int end_col; // Approximation.
+    RangeType type;
+    int def_line;
+    int def_col;
+    char *hover_text;
+    ASTNode *node;
+    struct LSPRange *next;
+} LSPRange;
+
+typedef struct LSPIndex
+{
+    LSPRange *head;
+    LSPRange *tail;
+} LSPIndex;
+
+// API.
+LSPIndex *lsp_index_new();
+void lsp_index_free(LSPIndex *idx);
+void lsp_index_add_def(LSPIndex *idx, Token t, const char *hover, ASTNode *node);
+void lsp_index_add_ref(LSPIndex *idx, Token t, Token def_t, ASTNode *node);
+LSPRange *lsp_find_at(LSPIndex *idx, int line, int col);
+
+// Walker.
+void lsp_build_index(LSPIndex *idx, ASTNode *root);
+
+#endif