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I am working on a custom front-end language using the LLVM c++ api and am adding a "class" definition construct to the language. The lexer and parser are written in C++ and LLVM c++ api is being used to generate IR code and compile to different machine backends. I can already define functions and variables, call functions and evaluate basic arithmetic with the custom front-end language.

In order to do add a "class" definition to the language, I am following the suggestion on https://mapping-high-level-constructs-to-llvm-ir.readthedocs.io/en/latest/object-oriented-constructs/classes.html

This suggests that we create a "structtype" to contain all the data members of the class and separately define a bunch of functions for the methods of the class (if I understand the link correctly).

Thus in my compiler code, I defined an AST node called "ClassAST" which contains the names and types for data members of the class and a collection of function definitions for the methods for the "class" being defined in the front-end language. The c++ code snippet for the AST node is as follows: