Docs: Add in-depth README.md documentation

README.md

@@ -1,78 +1,191 @@
-# Tralalero Lang
+# Tralalero_lang: A Simple, Whimsical Programming Language
 
-Benvenuto! Welcome to Tralalero Lang, the most whimsical and brain-tickling programming language inspired by the finest Italian-flavored brainrot.
+## Introduction
+
+Tralalero_lang is a small, interpreted programming language designed for simplicity and a touch of whimsy. It's built with Rust and aims to provide a straightforward environment for learning basic programming concepts, experimenting with language design, or simply having fun. The language uses a unique set of keywords inspired by playful Italian phrases, making the coding experience a bit more lighthearted.
 
 ## Getting Started
 
-To run a Tralalero program, you need to have Rust installed. Then, you can use the following command:
+To get started with Tralalero_lang, you'll need to have Rust installed on your system.
+
+### 1. Install Rust
+
+If you don't have Rust installed, you can install it using `rustup`:
 
 ```bash
-cargo run -- <file_name>.tralla
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 ```
 
-## Syntax
+Follow the on-screen instructions.
 
-A Tralalero program must start with `Tralalero Tralala` and end with `Bombardiro Crocodilo`.
+### 2. Clone the Repository
 
-## Keywords
+Clone the Tralalero_lang repository to your local machine:
 
-### `Tralalero Tralala`
+```bash
+git clone https://github.com/Alvin-Zilverstand/Tralalero_lang.git
+cd Tralalero_lang
+```
 
-This is the entry point of the program. It must be the first line of your code.
+### 3. Build the Interpreter
 
-### `Bombardiro Crocodilo`
+Navigate to the `Tralalero_lang` directory and build the interpreter using Cargo:
 
-This is the exit point of the program. It must be the last line of your code.
+```bash
+cargo build
+```
 
-### `Matteeeo <value>`
+This will compile the `main.rs` file and create an executable in the `target/debug/` directory (e.g., `target/debug/Tralalero_lang.exe` on Windows, or `target/debug/Tralalero_lang` on Linux/macOS).
 
-This command prints a value to the console. The value can be a string literal (enclosed in double quotes) or a variable.
+### 4. Run a Program
 
-### `Biscottini <variable_name> <value>`
+To run a Tralalero_lang program, execute the compiled interpreter followed by the path to your `.tralla` file:
 
-This command declares a variable and assigns a value to it. The value can be a string literal or a number.
+```bash
+./target/debug/Tralalero_lang.exe your_program.tralla
+```
+(On Windows, use `.\target\debug\Tralalero_lang.exe your_program.tralla`)
 
-### `Pinguino Arrabiato Fruti <number>`
+## Language Syntax and Semantics
 
-This command creates a loop that repeats a block of code a specified number of times. The block of code must be enclosed in `{` and `}` on separate lines.
+Tralalero_lang is a line-by-line interpreted language. Each program must begin with `Tralalero Tralala` and end with `Bombardiro Crocodilo`.
 
-Example:
+### Program Structure
-```tralalero
+
-Pinguino Arrabiato Fruti 3
+All Tralalero_lang programs must adhere to the following structure:
+
+```tralla
+Tralalero Tralala
+// Your code goes here
+Bombardiro Crocodilo
+```
+
+### Comments
+
+You can add single-line comments using `//`:
+
+```tralla
+// This is a comment
+let my_variable = 10; // This is also a comment
+```
+
+### Variables
+
+Variables are declared and assigned using the `let` keyword. Tralalero_lang supports numbers (floating-point) and strings.
+
+```tralla
+let my_number = 123.45;
+let my_string = "Hello, Tralalero!";
+let another_var = my_number;
+```
+
+### Data Types
+
+*   **Numbers:** Represented as floating-point numbers.
+*   **Strings:** Enclosed in double quotes (`"`).
+
+### Printing
+
+Use the `Matteeeo` keyword to print values to the console. You can print string literals or the values of variables.
+
+```tralla
+Matteeeo "This will be printed.";
+let greeting = "Ciao!";
+Matteeeo greeting;
+```
+
+### Arithmetic Operations
+
+Basic arithmetic operations (`+`, `-`, `*`, `/`) can be performed within `let` statements. The current implementation supports simple binary operations (operand operator operand).
+
+```tralla
+let num1 = 10;
+let num2 = 5;
+let sum = num1 + num2;       // sum will be 15
+let difference = num1 - num2; // difference will be 5
+let product = num1 * num2;   // product will be 50
+let quotient = num1 / num2;  // quotient will be 2
+```
+
+### String Concatenation
+
+The `Unire Corde` keyword is used to concatenate two strings (either literals or variables) and store the result in a new variable.
+
+```tralla
+let part1 = "Hello";
+let part2 = "World";
+Unire Corde full_string part1 part2; // full_string will be "HelloWorld"
+
+let greeting_part = "Good";
+Unire Corde final_greeting greeting_part "morning"; // final_greeting will be "Goodmorning"
+```
+**Note:** Due to current parsing limitations, avoid spaces within string literals when directly used with `Unire Corde`. It's recommended to assign strings with spaces to variables first, then use the variables for concatenation.
+
+### Conditional Statements
+
+Conditional logic is implemented using `Tung Tung Tung` (if) and `Ballerina Cappuccina` (else). Supported comparison operators are `==`, `!=`, `>`, `<`, `>=`, `<=`.
+
+```tralla
+let x = 10;
+let y = 5;
+
+Tung Tung Tung x > y
 {
-  Matteeeo "Hello"
+  Matteeeo "x is greater than y";
-}
-```
-
-### `Chimpanzini <variable_name> <operand1> <operator> <operand2>`
-
-This command performs an arithmetic operation and stores the result in a variable. The supported operators are `+`, `-`, `*`, `/`.
-
-Example:
-```tralalero
-Biscottini x 10
-Biscottini y 5
-Chimpanzini result x + y
-Matteeeo result // prints 15
-```
-
-### `Tung Tung Tung <operand1> <operator> <operand2>`
-
-This command executes a block of code if a condition is true. The supported operators are `==`, `!=`, `>`, `<`, `>=`, `<=`.
-
-This can be followed by a `Ballerina Cappuccina` block to execute code if the condition is false.
-
-Example:
-```tralalero
-Biscottini x 5
-Tung Tung Tung x > 10
-{
-  Matteeeo "x is greater than 10"
 }
 Ballerina Cappuccina
 {
-  Matteeeo "x is not greater than 10"
+  Matteeeo "x is not greater than y";
 }
 ```
 
-## Ciao!
+### Loops
+
+Fixed-iteration loops are supported using `Pinguino Arrabiato Fruti` followed by the number of iterations.
+
+```tralla
+Pinguino Arrabiato Fruti 3
+{
+  Matteeeo "This will print 3 times.";
+}
+```
+
+### Functions
+
+Functions are defined using `Lirili Larila` and called using `Trippi Troppi`. Functions can take arguments.
+
+```tralla
+Lirili Larila greet (name)
+{
+  Matteeeo "Hello, ";
+  Matteeeo name;
+}
+
+Trippi Troppi greet("Alice"); // Calls the greet function with "Alice"
+```
+
+### Known Limitations
+
+*   **Function Return Values:** Functions currently execute their body but do not return values that can be captured or used in the calling scope. Any `return` statements within a function are not processed to pass a value back.
+*   **Complex Expressions:** The `let` keyword's arithmetic parsing is limited to simple `operand operator operand` structures. More complex mathematical expressions (e.g., `(a + b) * c`) are not supported.
+*   **String Literals with Spaces in `Unire Corde`:** Directly using string literals containing spaces with `Unire Corde` can lead to parsing issues. Assign such strings to variables first.
+
+## Examples
+
+The `examples/` directory contains several `.tralla` files demonstrating various language features:
+
+*   `calculator.tralla`: Basic arithmetic operations and variable usage.
+*   `fibonacci.tralla`: Demonstrates loops and function calls (note the return value limitation).
+*   `string_manipulation.tralla`: Shows string concatenation.
+
+## Development
+
+Tralalero_lang is an ongoing project. Contributions and suggestions are welcome!
+
+## Future Enhancements
+
+*   Implement function return values.
+*   Add support for more complex mathematical expressions.
+*   Introduce more data types (e.g., booleans, lists).
+*   Improve error handling and reporting.
+*   Add more built-in functions (e.g., string manipulation, type conversion).