readme update

README.md

@@ -13,7 +13,8 @@ I didn't really study how others languages works beforehand, I'm just guessing h
 
 ## Progress
 
-- 2022-04-29 : Implementation of a basic evaluator engine to evaluate arithmetic expressions and call functions
+- 2022-04-29 Implementation of a basic evaluator engine to evaluate arithmetic expressions and call functions
+- 2022-05-15 Clear progress being able to use simple while and if though thre are many glitches
 
 ToDo List:
 
@@ -27,24 +28,34 @@ ToDo List:
 - [X] read line comments
 - [ ] add modulus operator '%'
 - [ ] implement input_number()
-- [ ] base of the CLI
+- [X] base of the CLI
 - [ ] evaluate expression from stdin
-- [ ] read a file
-- [ ] if statements
-- [ ] while statements (with break)
+- [X] read a file
+- [X] if statements
+- [ ] while statements (with break and continue)
 - [ ] add functions support
 - [ ] add config header file
 - [ ] ability to modify keywords and customize the lang
-- [ ] add strings support
-- [ ] add list support
+- [ ] add static string support (just for ui)
+- [ ] add print_string function
+- [ ] add basic number list support
+- [ ] add fully features strings support
+- [ ] add [classic problem solving](https://rosettacode.org) with code examples
+
+## Installation
+
+You will need to compile the code from source.
+
+- Clone this repository
+- Then compile (eg. with `make`)
+
+I use GNU Make with GCC, but I'm sure you can use any C compilers though you may need to edit some part of the code to cope with other compilers (eg. binary constants).
 
 
 ## The language
 
 You would be able to use the lang directly via CLI, via a REPL or by writing in a file (file ext `.ltor`).
 
-To begin with and order to simplify things we would only have numbers as datatypes (so an abstraction with int or float under the hood).
-
 One instruction set per line.
 
 ### Comments
@@ -55,12 +66,18 @@ Can only use single line comments with `#`
 # this is a comment
 ```
 
+### Data types
+
+To begin with and order to simplify things we would only have numbers as datatypes.
+
+When a variable is declared it can be 32 bit integer or 32 bit float.
+
+The language may support strings literals in the future.
+
 ### Expression evaluation
 
-can only operate on integer
-
 function calls: func(arg_a, arg_b)
-operators: +, *, /, ^
+operators: +, *, /, ^, %, =, <, >, &, |, !
 
 ### Set a variable
 
@@ -68,18 +85,17 @@ operators: +, *, /, ^
 set {VARNAME} to {EXPRESSION}
 ```
 
-### Eval an expression without using the result
+### Evaluate an expression without using the result
 
 ```
-eval print_number(42)
+print_number(42)
 ```
 
 ### function definition
 
 ```
-function {NAME}
-begin
-...
+function {NAME} do
+  ...
 end
 ```
 
@@ -87,8 +103,7 @@ end
 
 ```
 if {EXPRESSION} then
-begin
-    ...
+  ...
 end
 ```
 
@@ -96,17 +111,21 @@ end
 
 ```
 while {EXPRESSION} do
-begin
-    ...
+  ...
 end
 ```
 
 ### Unconditional loop
 
 ```
-repeat {EXPRESSION THAT EVALUATE TO INT}
-begin
+repeat {INT EXPRESSION} do
+  ...
+end
+```
 
+```
+repeat i from {INT EXPRESSION} to {INT EXPRESSION} do
+  ...
 end
 ```
 
@@ -118,6 +137,7 @@ sqrt,sin,cos,exp,ln,log etc.
 print_number(data)
 input_number()
 random_int(min, max)
+random_float(min, max)
 ```
 
 # Evaluator (draft)