Start writing actual compillation code in compiler series

content/blog/08_compiler_llvm.md

@@ -55,6 +55,7 @@ a `Module` object, which represents some collection of code and declarations
 {{< codeblock "C++" "compiler/08/llvm_context.hpp" >}}
 
 {{< todo >}} Consistently name context / state.{{< /todo >}}
+{{< todo >}} Explain creation functions. {{< /todo >}}
 
 We include the LLVM context, builder, and module as members
 of the context struct. Since the builder and the module need
@@ -97,6 +98,8 @@ which you can extrapolate the rest:
 
 {{< codelines "C++" "compiler/08/llvm_context.cpp" 7 11 >}}
 
+{{< todo >}} Also show struct body setters. {{< /todo >}}
+
 Similarly, here are a few lines from `create_functions()`, which
 give a very good idea of the rest of that method:
 
@@ -180,5 +183,7 @@ methods.
 With these things in mind, here's the signature for `gen_llvm`:
 
 ```C++
-virtual void gen_llvm(const llvm_context&, llvm::Function*) const;
+virtual void gen_llvm(llvm_context&, llvm::Function*) const;
 ```
+
+{{< todo >}} Fix pointer type inconsistencies. {{< /todo >}}