Move code into folders for convenience

code/compiler/02/compile.sh

@@ -0,0 +1,5 @@
+bison -o parser.cpp -d parser.y
+flex -o scanner.cpp scanner.l
+g++ -c -o scanner.o scanner.cpp
+g++ -c -o parser.o parser.cpp
+g++ main.cpp parser.o scanner.o

code/compiler/02/main.cpp

@@ -1,5 +1,5 @@
-#include "compiler_ast.hpp"
-#include "compiler_parser.hpp"
+#include "ast.hpp"
+#include "parser.hpp"
 
 void yy::parser::error(const std::string& msg) {
     std::cout << "An error occured: " << std::endl;

code/compiler/02/parser.y

@@ -1,8 +1,8 @@
 %{
 #include <string>
 #include <iostream>
-#include "compiler_ast.hpp"
-#include "compiler_parser.hpp"
+#include "ast.hpp"
+#include "parser.hpp"
 
 std::vector<definition_ptr> program;
 extern yy::parser::symbol_type yylex();

code/compiler/02/scanner.l

@@ -2,8 +2,8 @@
 
 %{
 #include <iostream>
-#include "compiler_ast.hpp"
-#include "compiler_parser.hpp"
+#include "ast.hpp"
+#include "parser.hpp"
 
 #define YY_DECL yy::parser::symbol_type yylex()
 

content/blog/01_compiler_tokenizing.md

@@ -201,7 +201,7 @@ So, our two regular expressions will be `[a-z][a-zA-Z]*` for the lowercase varia
 this, we create a new file, `scanner.l`, in which we write a mix of regular expressions
 and C++ code. Here's the whole thing:
 
-{{< rawblock "compiler_scanner.l" >}} 
+{{< rawblock "compiler/01/scanner.l" >}} 
 
 A flex file starts with options. I set the `noyywrap` option, which disables a particular
 feature of flex that we won't use, and which causes linker errors. Next up,

content/blog/02_compiler_parsing.md

@@ -225,14 +225,14 @@ Just like with tokenizing, there exists a piece of software that will generate a
 It's called Bison, and it is frequently used with Flex. Before we get to bison, though, we need to pay a debt we've already
 incurred - the implementation of our AST. Such a tree is language-specific, so Bison doesn't generate it for us. Here's what
 I came up with:
-{{< codeblock "C++" "compiler_ast.hpp" >}}
+{{< codeblock "C++" "compiler/02/ast.hpp" >}}
 We create a base class for an expression tree, which we call `ast`. Then, for each possible syntactic construct in our language
 (a number, a variable, a binary operation, a case expression) we create a subclass of `ast`. The `ast_case` subclass
 is the most complex, since it must contain a list of case expression branches, which are a combination of a `pattern` and
 another expression.
 
 Finally, we get to writing our Bison file, `parser.y`. Here's what I come up with:
-{{< rawblock "compiler_parser.y" >}}
+{{< rawblock "compiler/02/parser.y" >}}
 
 There's a few things to note here. First of all, the __parser__ is the "source of truth" regarding what tokens exist in our language.
 We have a list of `%token` declarations, each of which corresponds to a regular expression in our scanner. 
@@ -260,7 +260,7 @@ to return `yy::parser::symbol_type`. You can see it in our forward declaration o
 
 Now that we made these changes, it's time to hook up Flex to all this. Here's a new version
 of the Flex scanner, with all necessary modifications:
-{{< rawblock "compiler_scanner_bison.l" >}}
+{{< rawblock "compiler/02/scanner.l" >}}
 
 The key two ideas are that we overrode the default signature of `yylex` by changing the
 `YY_DECL` preprocessor variable, and used the `yy::parser::make_<TOKEN>` functions
@@ -268,16 +268,10 @@ to return the `symbol_type` rather than `int`.
 
 Finally, let's get a main function so that we can at least check for segmentation faults
 and other obvious mistakes:
-{{< codeblock "C++" "compiler_main.cpp" >}}
+{{< codeblock "C++" "compiler/02/main.cpp" >}}
 
 Now, we can compile and run the code:
-```
-flex -o compiler_scanner.cpp compiler_scanner_bison.l
-bison -o compiler_parser.cpp -d compiler_parser.y
-g++ -c -o scanner.o compiler_scanner.cpp
-g++ -c -o parser.o compiler_parser.cpp
-g++ compiler_main.cpp parser.o scanner.o
-```
+{{< codeblock "Bash" "compiler/02/compile.sh" >}}
 We used the `-d` option for Bison to generate the `compiler_parser.hpp` header file,
 which exports our token declarations and token creation functions, allowing
 us to use them in Flex.