Make the compile function plain C and take a JSON grammar

src/compiler/compile_error.h

@@ -0,0 +1,28 @@
+#ifndef COMPILER_COMPILE_ERROR_H_
+#define COMPILER_COMPILE_ERROR_H_
+
+#include <string>
+#include "tree_sitter/compiler.h"
+
+namespace tree_sitter {
+
+class CompileError {
+ public:
+  CompileError(TSCompileErrorType type, std::string message)
+      : type(type), message(message) {}
+
+  static CompileError none() {
+    return CompileError(TSCompileErrorTypeNone, "");
+  }
+
+  bool operator==(const CompileError &other) const {
+    return type == other.type && message == other.message;
+  }
+
+  TSCompileErrorType type;
+  std::string message;
+};
+
+}  // namespace tree_sitter
+
+#endif  // COMPILER_COMPILE_ERROR_H_