Updated README.md

recursiveDescentParsers/cplusplus/halfBakedCompiler/README.md

@@ -10,13 +10,16 @@ similar, please let me know, so I can give credit where credit is due --
 or disavow knowledge of that source (as the case may be).
 
 You are in the following subdirectory 
-  ** `interpret++`  
-     This code take mathematical expressions and evaluates them,
-     i.e. it outputs numbers. It is the same as its sister folder `interpreter`
-     as far as recursive descent parsing goes, but uses more C++ features and
-     is set up so as to support growing up to be a larger project. 
+  ** `halfBakedCompiler`  
+     This code take mathematical expressions and builds an abstract syntax tree,
+     a.k.a. an AST. It then dumps this AST as text. 
+     The parsing is equivalent to that in `interpreter` and `interpret++`
+     (neighboring directories and predecessor programs).
+     This version builds on `interpreter++` (and also requires C++17).
      
-See **Chapter 1 Front End Construction**, Slides 21 and 22 (and please let me know when the inevitable day comes that these slide numbers are no longer correct).
+See **Chapter 1 Front End Construction**, Slides 22-24 
+(and please let me know when the inevitable day comes 
+when these slide numbers are no longer correct).
 
 Building and Running
 ====================
@@ -30,7 +33,7 @@ In case of doubt, use the voodo command `make clean` and then repeat `make`.
 
 To test the program, run `make tests`. This also illustrates how the intepreter is used.
 
-Alternatively, just run the program with *no* parameters (i.e. simply `./intepret++`). 
+Alternatively, just run the program with *no* parameters (i.e. simply `./halfbaker`). 
 It will tell you how it wants to be run (Hint: there are two usages).
 
 Contents (Manifest)
@@ -38,6 +41,9 @@ Contents (Manifest)
 
 You should find here:
 
+* `ast.cpp` and `ast.h`   
+   Source code for the AST classes -- the data structures built by the parser.
+      
 * `lexer.cpp` and `lexer.h`   
    Source code for the lexer.
       
@@ -64,5 +70,5 @@ https://fbi.h-da.de/personen/ronald-moore/
 ronald.moore@h-da.de
  
 
-1 May 2020 
+2 May 2020