Use val and var

md/learn/adts/union-types.md

@@ -24,7 +24,7 @@ enum IpAddress
     V6(String),
 }
 
-let addr_1 = IpAddress::V4("192.168.0.1")
+val addr_1 = IpAddress::V4("192.168.0.1")
 
 match addr_1
 | IpAddress::V4(ip)

md/learn/basics/variables.md

@@ -4,23 +4,23 @@ thp distinguishes between mutable and immutable variables.
 
 ## Immutable variables
 
-Defined with `let`, followed by a variable name and a value.
+Defined with `val`, followed by a variable name and a value.
 
 ```thp
-let surname = "Doe"
+val surname = "Doe"
-let year_of_birth = 1984
+val year_of_birth = 1984
 ```
 
 ### Datatype annotation
 
-Written after the `let` keyword but before the variable name.
+Written after the `val` keyword but before the variable name.
 
 ```thp
-let String surname = "Doe"
+val String surname = "Doe"
-let Int year_of_birth = 1984
+val Int year_of_birth = 1984
 ```
 
-When annotating an immutable variable the `let` keyword is optional
+When annotating an immutable variable the `val` keyword is optional
 
 ```thp
 // Equivalent to the previous code
@@ -34,28 +34,28 @@ This means that if a variable has only a datatype, it is immutable.
 
 ## Mutable variables
 
-Defined with `let mut`, followed by a variable name and a value.
+Defined with `var`, followed by a variable name and a value.
 
 ```thp
-let mut name = "John"
+var name = "John"
-let mut age = 32
+var age = 32
 ```
 
 ### Datatype annotation
 
-Written after the `let mut` keywords but before the variable name.
+Written after the `var` keywords but before the variable name.
 
 ```thp
-let mut String name = "John"
+var String name = "John"
-let mut Int age = 32
+var Int age = 32
 ```
 
-When annotating a mutable variable the keyword `let` is optional. `mut` is still **required**.
+When annotating a mutable variable the keyword `var` is still **required**.
 
 ```thp
 // Equivalent to the previous code
-mut String name = "John"
+var String name = "John"
-mut Int age = 32
+var Int age = 32
 ```
 
 

md/learn/classes/definition.md

@@ -27,10 +27,10 @@ let instance = SimpleClass()
 class SimpleClass
 {
     // Properties are private by default
-    mut String? name = ...
+    var String? name = ...
 
     // Made public with `pub`
-    pub mut String? surname = ...
+    pub var String? surname = ...
 
     // Methods are private by default
     fun display_name()
@@ -58,10 +58,9 @@ Kotlin style
 
 ```thp
 class Cat(
-    // If a parameter has pub, protected or private they are promoted to properties
+    var String name,
-    private String name,
+    var Int lives = 9,
-    pub mut Int lives = 9,
+    val String surname = "Doe",
-    protected String surname = "Doe",
 )
 {
     pub fun get_name() -> String
@@ -107,7 +106,7 @@ class Dog(pub String name)
 Kotlin style
 
 ```thp
-class Animal(pub String name)
+class Animal(var String name)
 {
     pub fun say_name()
     {
@@ -120,6 +119,35 @@ class Cat(String name, Int lives) -> Animal(name)
 Cat("Michi", 9).say_name()
 ```
 
+## Mutable methods
+
+By default methods cannot mutate the state of the object.
+
+```thp
+class Animal(var String name)
+{
+    pub fun set_name(String new_name)
+    {
+        $name = new_name    // Error: Cannot mutate $
+    }
+}
+```
+
+To do so the method must be annotated. The caller must also
+declare a mutable variable.
+
+```thp
+class Animal(var String name)
+{
+    pub mut fun set_name(String new_name)
+    {
+        $name = new_name    // Ok
+    }
+}
+
+var michi = Animal("Michifu")
+michi.set_name("Garfield")
+```
 
 
 

md/learn/classes/magic.md

@@ -16,10 +16,9 @@ class Cat
 
 
 ```thp
-let option = Some("GAAA")
+val option = Some("GAAA")
-let Some(value) = option
+val Some(value) = option
-
-let colors = Array("red", "green", "blue")
-let Array()
 
+val colors = Array("red", "green", "blue")
+val Array()
 ```

md/learn/collections/arrays.md

@@ -5,13 +5,13 @@ Use square brackets as usual.
 ## Usage
 
 ```thp
-let fruits = ["apple", "banana", "cherry"]
+val fruits = ["apple", "banana", "cherry"]
-let apple = fruits[0]
+val apple = fruits[0]
 
 print(apple)
 
 
-let mut numbers = [0, 1, 2, 3]
+val mut numbers = [0, 1, 2, 3]
 
 numbers[3] = 5
 

md/learn/collections/maps.md

@@ -6,7 +6,7 @@ Also known as Associative Arrays
 ## Usage without a declaration
 
 ```thp
-let mut person = Obj {
+val mut person = Obj {
     name: "John",
     surname: "Doe",
     age: 33,
@@ -31,7 +31,7 @@ obj Person = {
 }
 
 
-let john_doe = Person {
+val john_doe = Person {
     name: "John",
     surname: "Doe",
     age: 33,

md/learn/collections/sets.md

@@ -3,7 +3,7 @@
 
 ```thp
 // Set[Int]
-let ages = Set(30, 31, 33, 35)
+val ages = Set(30, 31, 33, 35)
 
 for age in ages {
     print("{age}")

md/learn/collections/tuples.md

@@ -6,9 +6,9 @@ calls (`()`).
 ## Definition
 
 ```thp
-let person = #("John", "Doe", 32)
+val person = #("John", "Doe", 32)
 
-let #(name, surname, age) = person
+val #(name, surname, age) = person
 ```
 
 

md/learn/flow-control/conditionals.md

@@ -22,7 +22,7 @@ else
 }
 
 
-let result = if condition { value1 } else { value2 }
+val result = if condition { value1 } else { value2 }
 ```
 
 
@@ -40,7 +40,7 @@ if variable is Datatype
 ## If variable is of enum
 
 ```thp
-let user_id = POST::get("user_id")
+val user_id = POST::get("user_id")
 
 if Some(user_id) = user_id
 {

md/learn/flow-control/loops.md

@@ -5,7 +5,7 @@
 Braces are required.
 
 ```thp
-let numbers = [0, 1, 2, 3]
+val numbers = [0, 1, 2, 3]
 
 for number in numbers
 {
@@ -19,7 +19,7 @@ for #(index, number) in numbers.entries()
 ```
 
 ```thp
-let dict = Obj {
+val dict = Obj {
     apple: 10,
     banana: 7,
     cherries: 3,
@@ -45,8 +45,8 @@ for value in collection
 ## While loop
 
 ```thp
-let colors = ["red", "green", "blue"]
+val colors = ["red", "green", "blue"]
-let mut index = 0
+val mut index = 0
 
 while index < colors.size()
 {

md/learn/flow-control/match.md

@@ -5,7 +5,7 @@
 Braces are **required**.
 
 ```thp
-let user_id = POST::get("user_id")
+val user_id = POST::get("user_id")
 
 
 match user_id

md/learn/functions/declaration.md

@@ -21,7 +21,7 @@ fun get_random_number() -> Int
     Random::get(0, 35_222)
 }
 
-let number = get_random_number()
+val number = get_random_number()
 ```
 
 ## With parameters and return type
@@ -32,7 +32,7 @@ fun get_secure_random_number(Int min, Int max) -> Int
     Random::get_secure(min, max)
 }
 
-let number = get_secure_random_number(0, 65535)
+val number = get_secure_random_number(0, 65535)
 ```
 
 
@@ -44,10 +44,10 @@ fun get_first_item[T](Array[T] array) -> T
     array[0]
 }
 
-let first = get_first_item[Int](numbers)
+val first = get_first_item[Int](numbers)
 // The type annotation is optional if the compiler can infer the type
 
-let first = get_first_item(numbers)
+val first = get_first_item(numbers)
 ```
 
 

md/learn/functions/higher-order.md

@@ -23,8 +23,8 @@ fun generate_generator() -> () -> Int
 }
 
 
-let generator = generate_generator()  // A function
+val generator = generate_generator()  // A function
-let value = generate_generator()()    // An Int
+val value = generate_generator()()    // An Int
 ```
 
 

md/learn/functions/lambdas.md

@@ -22,9 +22,9 @@ By default closures **always** capture variables as **references**.
 
 
 ```thp
-let mut x = 20
+val mut x = 20
 
-let f = fun() {
+val f = fun() {
     print(x)
 }
 
@@ -44,9 +44,9 @@ fun(parameters) clone(variables) {
 ```
 
 ```thp
-let mut x = 20
+val mut x = 20
 
-let f = fun() clone(x) {
+val f = fun() clone(x) {
     print(x)
 }
 

md/learn/functions/parameters.md

@@ -10,16 +10,18 @@ fun add_25(Array[Int] numbers) {
 ```
 
 When using a regular type as a parameter, only it's immutable
-properties can be used inside the function
+properties can be used
 
 ```thp
 fun count(Array[Int] numbers) -> Int {
-    let items_count = numbers.size()    // Ok, `size` is pure
+    val items_count = numbers.size()    // Ok, `size` is pure
 
     items_count
 }
 ```
 
+To use immutable properties you must use a mutable reference.
+
 
 ## Mutable reference
 
@@ -36,7 +38,7 @@ data **can** be mutated.
 The caller *must* also use `mut`.
 
 ```thp
-let numbers = Array(0, 1, 2, 3)
+val numbers = Array(0, 1, 2, 3)
 
 push_25(mut numbers)    // Pass `numbers` as reference.
 
@@ -58,7 +60,7 @@ of the parameter (CoW). The original data will **not** be mutated.
 
 
 ```thp
-let numbers = Array(1, 2, 3, 4)
+val numbers = Array(1, 2, 3, 4)
 
 add_25(clone numbers)    // Pass `numbers` as clone.
 

md/learn/index.md

@@ -55,7 +55,7 @@ These are **not** aspects that THP looks to solve or implement.
 $has_key = str_contains($haystack, 'needle');
 
 // THP
-let has_key = haystack.contains("needle")
+val has_key = haystack.contains("needle")
 ```
 
 - Explicit variable declaration
@@ -83,7 +83,7 @@ Obj {
 ```
 
 - Tuples, Arrays, Sets, Maps are clearly different
-- JS-like object syntax
+- JSON-like object syntax
 
 ---
 
@@ -93,7 +93,7 @@ $cat = new Cat("Michifu", 7);
 $cat->meow();
 
 // THP
-let cat = Cat("Michifu", 7)
+val cat = Cat("Michifu", 7)
 cat.meow();
 ```
 
@@ -133,7 +133,7 @@ For example:
 
 ```thp
 // This expression
-let greeting = 
+val greeting = 
     match get_person()
     | Some(person) if person.age > 18
     { 
@@ -176,7 +176,7 @@ enum IpAddress {
     V6(String),
 }
 
-let ip_1 = IpAddress::V4("255.255.0.0")
+val ip_1 = IpAddress::V4("255.255.0.0")
 
 
 // Would possibly compile to:

static/index.html

@@ -13,7 +13,7 @@
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link
-        href="https://fonts.googleapis.com/css2?family=Fira+Sans:wght@400;500;600;700;800;900&family=Fugaz+One&family=Inconsolata&family=Inter&display=swap"
+        href="https://fonts.googleapis.com/css2?family=Fira+Sans:wght@400;500;600;700;800;900&display=swap"
         rel="stylesheet">
     <link
         href="https://fonts.googleapis.com/css2?family=Fira+Code&family=Josefin+Sans:ital,wght@0,400;1,700&display=swap"
@@ -40,6 +40,8 @@
             </h1>
             <p class="font-display text-c-text opacity-60 text-xl pt-4">
                 Syntax, stdlib and types for PHP
+                <br>
+                Written in Rust
             </p>
         </div>
 
@@ -86,7 +88,11 @@
             Learn
         </a>
 
-        <a class="inline-block font-display text-lg border-2 border-[#5BCEFA] py-3 px-8 mx-6 rounded" href="/install/">
+        <a 
+            class="inline-block font-display text-lg border-2 border-sky-400 py-3 px-8 mx-6 rounded
+                transition-colors hover:text-black hover:bg-sky-400" 
+            href="/install/"
+        >
             Install
         </a>
     </div>

static/js/prism.thp.js

@@ -15,7 +15,7 @@ Prism.languages.thp = {
         pattern: /(["])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
         greedy: true,
     },
-    "keyword": /\b(?:static|const|enum|loop|use|break|catch|continue|do|else|finally|for|fun|if|in|fn|nil|return|throw|try|while|type|match|with|of|abstract|class|interface|private|pub|obj|override|open|init|let|mut|clone)\b/,
+    "keyword": /\b(?:static|const|enum|loop|use|break|catch|continue|do|else|finally|for|fun|if|in|fn|nil|return|throw|try|while|type|match|with|of|abstract|class|interface|private|pub|obj|override|open|init|val|var|mut|clone)\b/,
     "number": /\b0x[\da-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?/i,
     "operator": /[<>]=?|[!=]=?=?|--?|\$|\+\+?|&&?|\|\|?|[?*/~^%]/,
     "punctuation": /[{}[\];(),.]/,

static/template.html

@@ -14,14 +14,11 @@
     <link rel="preconnect" href="https://fonts.googleapis.com">
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link
-        href="https://fonts.googleapis.com/css2?family=Fira+Sans:wght@400;500;600;700;800;900&family=Fugaz+One&family=Inconsolata&family=Inter&display=swap"
+        href="https://fonts.googleapis.com/css2?family=Fira+Sans:wght@400;500;600;700;800;900&display=swap"
         rel="stylesheet">
     <link
         href="https://fonts.googleapis.com/css2?family=Fira+Code&family=Josefin+Sans:ital,wght@0,400;1,700&display=swap"
         rel="stylesheet">
-
-    <style>
-    </style>
 </head>
 
 <body class="bg-c-bg text-c-text">
@@ -44,7 +41,7 @@
 
         <div class="pt-12 max-h-screen border-r border-r-[rgba(91,205,250,0.25)] overflow-x-scroll sticky top-0">
             <nav class="rounded-md mt-2 p-4">
-                <h2 class="text-xl font-display pb-4">On this page</h2>
+                <h2 class="text-xl font-display pb-4 opacity-75">On this page</h2>
 
                 {{sidebar}}
             </nav>

tailwind.config.js

@@ -22,11 +22,14 @@ module.exports = {
             "body": ["'Fira Sans'", "Inter", "sans-serif"],
         },
     },
+    corePlugins: {
+        container: false
+    },
     plugins: [
         function ({ addComponents }) {
             addComponents({
                 '.container': {
-                    maxWidth: '95%',
+                    width: '98%',
                     '@screen sm': {
                         maxWidth: '640px',
                     },

tailwind.css

@@ -17,7 +17,7 @@
 
 @media (prefers-color-scheme: light) {
     :root {
-        --c-bg: rgb(255, 247, 255);
+        --c-bg: rgb(255, 253, 255);
         --c-text: #121212;
         --c-purple: #374259;
         --c-purple-light: #BA94D1;