Adding argument attributes 'mut' and 'ref'

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## [Unreleased version] - 20XX-XX-XX
 ### Added
 - new builtin `disassemble` to print the bytecode of a function
+- new builtin `io:readFileLines` to read lines from a file as a list of strings
 
 ### Changed
 - the formatter properly formats dictionaries (key-value pairs on their own line, always)

examples/closures.ark

@@ -1,7 +1,7 @@
 # Inspired by
 # Closures and object are equivalent: http://wiki.c2.com/?ClosuresAndObjectsAreEquivalent
 # this will construct a closure capturing the 3 arguments, plus a function to set the age
-(let create-human (fun (name age weight) {
+(let create-human (fun (name (mut age) weight) {
   # functions can be invoked in the closure scope
   (let set-age (fun (new-age)
     (set age new-age)))

include/Ark/Builtins/Builtins.hpp

@@ -52,6 +52,7 @@ namespace Ark::internal::Builtins
         ARK_BUILTIN(writeFile);
         ARK_BUILTIN(appendToFile);
         ARK_BUILTIN(readFile);
+        ARK_BUILTIN(readLinesFile);
         ARK_BUILTIN(fileExists);
         ARK_BUILTIN(listFiles);
         ARK_BUILTIN(isDirectory);

include/Ark/Compiler/Common.hpp

@@ -43,6 +43,8 @@ namespace Ark::internal
     enum class NodeType
     {
         Symbol,
+        MutArg,
+        RefArg,
         Capture,
         Keyword,
         String,
@@ -56,8 +58,10 @@ namespace Ark::internal
     };
 
     /// Node types as string, in the same order as the enum NodeType
-    constexpr std::array<std::string_view, 11> nodeTypes = {
+    constexpr std::array<std::string_view, 13> nodeTypes = {
         "Symbol",
+        "MutArg",
+        "RefArg",
         "Capture",
         "Keyword",
         "String",