Start building AST in parser

src/runtime/document.c

@@ -0,0 +1,34 @@
+#include "document.h"
+
+struct TSDocument {
+    TSDocumentParseFn *parse_fn;
+    const char **symbol_names;
+    const char *text;
+    TSTree *tree;
+};
+
+TSDocument * TSDocumentMake() {
+    TSDocument *result = malloc(sizeof(TSDocument));
+    return result;
+}
+
+void TSDocumentSetUp(TSDocument *document, TSDocumentParseFn fn, const char **symbol_names) {
+    document->parse_fn = fn;
+    document->symbol_names = symbol_names;
+}
+
+void TSDocumentSetText(TSDocument *document, const char *text) {
+    document->text = text;
+    document->tree = document->parse_fn(document->text);
+}
+
+TSTree * TSDocumentTree(const TSDocument *document) {
+    return document->tree;
+}
+
+char * TSDocumentToString(const TSDocument *document) {
+    if (document->tree)
+        return TSTreeToString(document->tree, document->symbol_names);
+    else
+        return "#<null tree>";
+}