обновление 1.0.5

* стек теперь не бесконечный. задать можно через аргумент cli (максимум 65535, дефолт: 256)

.gitignore

@@ -1,3 +1,2 @@
 /target
-/archive
 /bin

Cargo.lock

@@ -10,7 +10,7 @@ checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
 
 [[package]]
 name = "labast"
-version = "1.0.4"
+version = "1.0.5"
 dependencies = [
  "fastrand",
  "pico-args",

Cargo.toml

@@ -1,9 +1,9 @@
 [package]
 name = "labast"
-version = "1.0.4"
+version = "1.0.5"
 authors = [ "n3tael" ]
 edition = "2021"
-description = "A zero-dependencies Labaski interpreter written in Rust."
+description = "A Labaski interpreter written in Rust."
 readme = "README.md"
 license = "MIT"
 publish = false

build.bat

@@ -3,7 +3,9 @@ echo Building for Windows...
 cargo build --release
 echo Building for Linux...
 cargo zigbuild --release --target x86_64-unknown-linux-gnu
-echo Copy to bin...
+echo Copy binaries to bin folder...
 copy target\release\labast.exe bin\ /Y
 copy target\x86_64-unknown-linux-gnu\release\labast bin\ /Y
+echo Creating source code tar.gz archive...
+tar --exclude="./bin" --exclude="./target" --exclude=".git" -cvzf bin\labast-latest.tar.gz *
 echo Done!

scripts/calc.lb

@@ -12,7 +12,7 @@
 
 @ 2
     sub
-    meow dkdkd
+    meow
     quit 
 
 @ 3

src/errors.rs

@@ -1,5 +1,19 @@
 use std::fmt::Display;
 
+pub enum StackError {
+    StackOverflow,
+    StackUnderflow,
+}
+
+impl Display for StackError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            StackError::StackOverflow => write!(f, "Stack overflow!"),
+            StackError::StackUnderflow => write!(f, "Stack underflow!"),
+        }
+    }
+}
+
 pub enum RunError {
     RequestArgsInMainModule,
     ExecuteItself(String),
@@ -11,7 +25,6 @@ pub enum RunError {
     FailToReadLineFromConsole,
     UnknownLabel(u16),
     InvalidExpressionUnknownOperator(String),
-    MemoryEmpty,
     AttemptToInsertHashOrStringInst,
     AttemptToInsertEmptyConst,
     AttemptToInsertALabel
@@ -30,7 +43,6 @@ impl Display for RunError {
             RunError::FailToReadLineFromConsole => write!(f, "Failed to read line from console"),
             RunError::UnknownLabel(label_name) => write!(f, "Unknown label: {}", label_name),
             RunError::InvalidExpressionUnknownOperator(name) => write!(f, "Invalid expression: unknown operator '{}'", name),
-            RunError::MemoryEmpty => write!(f, "No elements in memory!"),
             RunError::AttemptToInsertHashOrStringInst => write!(f, "Attempt to insert a hash/string-instruction"),
             RunError::AttemptToInsertEmptyConst => write!(f, "Attempt to insert an empty constant"),
             RunError::AttemptToInsertALabel => write!(f, "Attempt to insert a label"),

src/execute.rs

@@ -1,4 +1,4 @@
-use crate::{errors::RunError, instructions, stack::{Instruction, Stack}};
+use crate::{instructions, stack::{Instruction, Stack, StackVec}};
 
 fn find_labels(stack: &mut Stack) {
     while stack.program_counter < (stack.program.len() as u16) {
@@ -11,7 +11,7 @@ fn find_labels(stack: &mut Stack) {
 
         if stack.labels[label.data as usize].is_some() {
             eprintln!("Label {} already defined", label.data);
-            return;
+            std::process::exit(2);
         }
 
         if label.data == 0 {
@@ -22,23 +22,18 @@ fn find_labels(stack: &mut Stack) {
         stack.labels[label.data as usize] = Some(stack.program_counter as i16);
     }
 
-    if stack.labels[0].is_some() {
-        stack.program_counter = stack.labels[0].unwrap() as u16;
-    } else {
-        stack.program_counter = 0;
-    }
+    stack.program_counter = stack.labels[0].unwrap_or(0) as u16;
 }
 
-fn find_prefix_operators(instruction: &mut Instruction, memory: &mut Vec<u16>) {
+fn find_prefix_operators(instruction: &mut Instruction, memory: &mut StackVec) {
     match instruction.name.chars().nth(0) {
         Some('|') => {
             instruction.name = instruction.name.chars().skip(1).collect();
-
-            instruction.data = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+            instruction.data = memory.pop();
         },
         Some('^') => {
             instruction.name = instruction.name.chars().skip(1).collect();
-            //dbg!(&instruction);
+
             if instruction.name.chars().nth(0) != Some('#') {
                 println!("{0} {1}", instruction.name, instruction.data.to_string());
             } else if instruction.arg.is_empty() {
@@ -51,7 +46,7 @@ fn find_prefix_operators(instruction: &mut Instruction, memory: &mut Vec<u16>) {
     }
 }
 
-pub fn execute(stack: &mut Stack, mut origin_stack: Option<&mut Stack>, mod_name: &String) {
+pub fn execute(stack: &mut Stack, mut origin_stack: Option<&mut Stack>, mod_name: String) {
     find_labels(stack);
 
     while let Some(mut instruction) = stack.program.get_mut(stack.program_counter as usize) {
@@ -65,11 +60,11 @@ pub fn execute(stack: &mut Stack, mut origin_stack: Option<&mut Stack>, mod_name
 
         match instruction.name.as_str() {
             // Stack operations
-            "push" => instructions::push::push(&mut stack.memory, &instruction.data),
+            "push" => instructions::push::push(&mut stack.memory, instruction.data),
             "pop"  => instructions::pop::pop(&mut stack.memory),
             "dup"  => instructions::dup::dup(&mut stack.memory),
             "swap" => instructions::swap::swap(&mut stack.memory),
-            "pick" => instructions::pick::pick(&mut stack.memory, &instruction.data),
+            "pick" => instructions::pick::pick(&mut stack.memory, instruction.data),
 
             // Math
             "add" => instructions::add::add(&mut stack.memory),
@@ -93,46 +88,45 @@ pub fn execute(stack: &mut Stack, mut origin_stack: Option<&mut Stack>, mod_name
             "bnot"   => instructions::not::not(&mut stack.memory),
 
             // Labels
-            "jmp"  => instructions::jmp::jmp(&mut stack.labels, &mut stack.program_counter, &instruction.data),
-            "jnz"  => instructions::jnz::jnz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, &instruction.data),
-            "jz"   => instructions::jz::jz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, &instruction.data),
-            "kjnz" => instructions::kjnz::kjnz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, &instruction.data),
-            "kjz"  => instructions::kjz::kjz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, &instruction.data),
+            "jmp"  => instructions::jmp::jmp(&mut stack.labels, &mut stack.program_counter, instruction.data),
+            "jnz"  => instructions::jnz::jnz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, instruction.data),
+            "jz"   => instructions::jz::jz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, instruction.data),
+            "kjnz" => instructions::kjnz::kjnz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, instruction.data),
+            "kjz"  => instructions::kjz::kjz(&mut stack.memory, &mut stack.labels, &mut stack.program_counter, instruction.data),
 
             // Input/Output
             "putc"     => instructions::putc::putc(&mut stack.memory),
             "getc"     => instructions::getc::getc(&mut stack.memory),
             "scan"     => instructions::scan::scan(&mut stack.memory),
             "meow"     => instructions::meow::meow(&mut stack.memory),
-            "#print"   => instructions::print::print(&instruction.arg),
-            "$print"   => instructions::print::print(&instruction.arg),
-            "#println" => instructions::println::println(&instruction.arg),
-            "$println" => instructions::println::println(&instruction.arg),
+            "#print"   => instructions::print::print(instruction.arg.clone()),
+            "$print"   => instructions::print::print(instruction.arg.clone()),
+            "#println" => instructions::println::println(instruction.arg.clone()),
+            "$println" => instructions::println::println(instruction.arg.clone()),
 
             // Modules
-            "args"  => instructions::args::args(&mut stack.memory, &mut origin_stack, &instruction.data),
+            "args"  => instructions::args::args(&mut stack.memory, &mut origin_stack, instruction.data),
             "#exec" => {
                 let arg = instruction.arg.clone();
-                instructions::exec::exec(stack, &arg, &mod_name);
-            }
-
+                instructions::exec::exec(stack, arg, mod_name.clone())
+            },
+            
             // Self-modifying
             
             "#insert" => {
                 let arg = instruction.arg.clone();
                 let data = instruction.data.clone();
-
-                instructions::insert::insert(&mut stack.program, &arg, &data)
+                instructions::insert::insert(&mut stack.program, arg, data)
             },
 
             // Special
             "dump"    => instructions::dump::dump(&mut stack.memory),
             "size"    => instructions::size::size(&mut stack.memory),
             "maxsize" => instructions::maxsize::maxsize(&mut stack.memory),
-            "#expr"   => instructions::expr::expr(&mut stack.memory, &instruction.arg),
+            "#expr"   => instructions::expr::expr(&mut stack.memory, instruction.arg.clone()),
             "nop"     => continue,
             "quit"    => break,
-            "exit"    => instructions::exit::exit(&instruction.data),
+            "exit"    => instructions::exit::exit(instruction.data),
 
             // Platform-specific
             #[cfg(target_family = "unix")] 

src/instructions/_unix_random.rs

@@ -1,14 +1,14 @@
 use std::fs::File;
 use std::io::Read;
-use crate::RunError;
+use crate::stack::StackVec;
 
 #[cfg(target_family = "unix")]
-pub fn _unix_random(memory: &mut Vec<u16>) {
+pub fn _unix_random(memory: &mut StackVec) {
     let mut rng = File::open("/dev/urandom").unwrap();
 
     let mut buffer = [0u8; 2];
     rng.read_exact(&mut buffer).unwrap();
 
-    let data = &memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    memory.push((u16::from_ne_bytes(buffer)) % (*data - 1));
+    let data = memory.pop();
+    memory.push((u16::from_ne_bytes(buffer)) % (data - 1));
 }

src/instructions/add.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn add(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn add(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(a + b);
 }

src/instructions/and.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn and(memory: &mut Vec<u16>) {
-    let a: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
-    let b: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
+pub fn and(memory: &mut StackVec) {
+    let a: bool = memory.pop() == 1;
+    let b: bool = memory.pop() == 1;
 
     let c: u16 = if a && b {
         1

src/instructions/args.rs

@@ -1,15 +1,15 @@
-use crate::{errors::RunError, stack::Stack};
+use crate::{errors::RunError, stack::{Stack, StackVec}};
 
-pub fn args(memory: &mut Vec<u16>, origin_stack: &mut Option<&mut Stack>, data: &u16) {
+pub fn args(memory: &mut StackVec, origin_stack: &mut Option<&mut Stack>, data: u16) {
     if let Some(origin_stack) = origin_stack.as_mut() {
-        let mut data = *data;
+        let mut data = data;
 
         if data == 0 {
-            data = origin_stack.memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+            data = origin_stack.memory.pop();
         }
 
         for _ in 0..data {
-            memory.push(origin_stack.memory.pop().expect(&format!("{}", RunError::MemoryEmpty)));
+            memory.push(origin_stack.memory.pop());
         }
     } else {
         eprintln!("{}", RunError::RequestArgsInMainModule);

src/instructions/band.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn band(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn band(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(a & b);
 }

src/instructions/bnand.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn bnand(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn bnand(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(!(a & b));
 }

src/instructions/bor.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn bor(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn bor(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(a | b);
 }

src/instructions/bxor.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn bxor(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn bxor(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(a ^ b);
 }

src/instructions/div.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn div(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn div(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(b / a);
 }

src/instructions/dump.rs

@@ -1,4 +1,6 @@
-pub fn dump(memory: &mut Vec<u16>) {
+use crate::stack::StackVec;
+
+pub fn dump(memory: &mut StackVec) {
     if memory.is_empty() {
         println!("Stack is empty.");
         return;

src/instructions/dup.rs

@@ -1,5 +1,6 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn dup(memory: &mut Vec<u16>) {
-    memory.push(*memory.last().expect(&format!("{}", RunError::MemoryEmpty)));
+pub fn dup(memory: &mut StackVec) {
+    let data = memory.last();
+    memory.push(data);
 }

src/instructions/exec.rs

@@ -1,19 +1,19 @@
 use std::fs;
 use crate::{parse, execute, Stack, errors::RunError};
 
-pub fn exec(mut stack: &mut Stack, arg: &String, mod_name: &String) {
+pub fn exec(mut stack: &mut Stack, arg: String, mod_name: String) {
     if mod_name == arg {
         eprintln!("{}", RunError::ExecuteItself(arg.to_string()));
         std::process::exit(2);
     }
 
     let lines = fs::read_to_string(&arg).expect(&format!("{}", RunError::FailToReadFile));
-    let mut temp_stack = Stack::new();
+    let mut temp_stack = Stack::new(stack.memory.size());
 
     parse(&mut temp_stack, &lines);
-    execute(&mut temp_stack, Some(&mut stack), &arg.clone());
+    execute(&mut temp_stack, Some(&mut stack), arg.clone());
 
-    for item in temp_stack.memory {
-        stack.memory.push(item);
+    for item in temp_stack.memory.iter() {
+        stack.memory.push(*item);
     }
 }

src/instructions/exit.rs

@@ -1,3 +1,3 @@
-pub fn exit(data: &u16) {
-    std::process::exit((*data).into());
+pub fn exit(data: u16) {
+    std::process::exit(data as i32);
 }

src/instructions/expr.rs

@@ -1,24 +1,27 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn expr(memory: &mut Vec<u16>, arg: &String) {
+pub fn expr(memory: &mut StackVec, arg: String) {
     for code in arg.chars() {
         match code {
             '>' => memory.push(0),
             '$' => { memory.pop(); },
-            ':' => memory.push(*memory.last().expect(&format!("{}", RunError::MemoryEmpty))),
+            ':' => {
+                let data = memory.last().clone();
+                memory.push(data);
+            },
             '\\' => {
-                let ax = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-                let ax2 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+                let ax = memory.pop();
+                let ax2 = memory.pop();
                 
                 memory.push(ax);
                 memory.push(ax2);
             }
             '+' => {
-                let ax = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+                let ax = memory.pop();
                 memory.push(ax + 1);
             }
             '-' => {
-                let ax = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+                let ax = memory.pop();
                 memory.push(ax - 1);
             }
 

src/instructions/getc.rs

@@ -1,7 +1,7 @@
 use std::io::Read;
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn getc(memory: &mut Vec<u16>) {
+pub fn getc(memory: &mut StackVec) {
     let char = std::io::stdin()
         .bytes()
         .next()

src/instructions/insert.rs

@@ -1,6 +1,6 @@
 use crate::{errors::RunError, stack::Instruction};
 
-pub fn insert(program: &mut Vec<Instruction>, arg: &String, data: &u16) {
+pub fn insert(program: &mut Vec<Instruction>, arg: String, data: u16) {
     let args: Vec<char> = arg.chars().collect();
     
     if args[0] == '#' || args[0] == '$' {
@@ -21,6 +21,6 @@ pub fn insert(program: &mut Vec<Instruction>, arg: &String, data: &u16) {
     program.push(Instruction {
         name:  arg.to_string(),
         arg:  "\n".to_string(),
-        data: *data
+        data
     });
 }

src/instructions/jmp.rs

@@ -1,10 +1,10 @@
 use crate::errors::RunError;
 
-pub fn jmp(labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: &u16) {
-    if labels[*data as usize].is_none() {
-        eprintln!("{}", RunError::UnknownLabel(*data));
+pub fn jmp(labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: u16) {
+    if labels[data as usize].is_none() {
+        eprintln!("{}", RunError::UnknownLabel(data));
         std::process::exit(2);
     }
 
-    *program_counter = (labels[*data as usize].unwrap() - 1) as u16;
+    *program_counter = (labels[data as usize].unwrap() - 1) as u16;
 }

src/instructions/jnz.rs

@@ -1,12 +1,12 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn jnz(memory: &mut Vec<u16>, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: &u16) {
-    if labels[*data as usize].is_none() {
-        eprintln!("{}", RunError::UnknownLabel(*data));
+pub fn jnz(memory: &mut StackVec, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: u16) {
+    if labels[data as usize].is_none() {
+        eprintln!("{}", RunError::UnknownLabel(data));
         std::process::exit(2);
     }
 
-    if memory.pop() != Some(0) {
-        *program_counter = (labels[*data as usize].unwrap() - 1) as u16;
+    if memory.pop() != 0 {
+        *program_counter = (labels[data as usize].unwrap() - 1) as u16;
     }
 }

src/instructions/jz.rs

@@ -1,12 +1,12 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn jz(memory: &mut Vec<u16>, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: &u16) {
-    if labels[*data as usize].is_none() {
-        eprintln!("{}", RunError::UnknownLabel(*data));
+pub fn jz(memory: &mut StackVec, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: u16) {
+    if labels[data as usize].is_none() {
+        eprintln!("{}", RunError::UnknownLabel(data));
         std::process::exit(2);
     }
 
-    if memory.pop() == Some(0) {
-        *program_counter = (labels[*data as usize].unwrap() - 1) as u16;
+    if memory.pop() == 0 {
+        *program_counter = (labels[data as usize].unwrap() - 1) as u16;
     }
 }

src/instructions/kjnz.rs

@@ -1,12 +1,12 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn kjnz(memory: &mut Vec<u16>, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: &u16) {
-    if labels[*data as usize].is_none() {
-        eprintln!("{}", RunError::UnknownLabel(*data));
+pub fn kjnz(memory: &mut StackVec, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: u16) {
+    if labels[data as usize].is_none() {
+        eprintln!("{}", RunError::UnknownLabel(data));
         std::process::exit(2);
     }
 
-    if memory.last() != Some(&0) {
-        *program_counter = (labels[*data as usize].unwrap() - 1) as u16;
+    if memory.last() != 0 {
+        *program_counter = (labels[data as usize].unwrap() - 1) as u16;
     }
 }

src/instructions/kjz.rs

@@ -1,12 +1,12 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn kjz(memory: &mut Vec<u16>, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: &u16) {
-    if labels[*data as usize].is_none() {
-        eprintln!("{}", RunError::UnknownLabel(*data));
+pub fn kjz(memory: &mut StackVec, labels: &mut [Option<i16>; 256], program_counter: &mut u16, data: u16) {
+    if labels[data as usize].is_none() {
+        eprintln!("{}", RunError::UnknownLabel(data));
         std::process::exit(2);
     }
 
-    if memory.last() == Some(&0) {
-        *program_counter = (labels[*data as usize].unwrap() - 1) as u16;
+    if memory.last() == 0 {
+        *program_counter = (labels[data as usize].unwrap() - 1) as u16;
     }
 }

src/instructions/maxsize.rs

@@ -1,3 +1,5 @@
-pub fn maxsize(memory: &mut Vec<u16>) {
-    memory.push(u16::MAX);
+use crate::stack::StackVec;
+
+pub fn maxsize(memory: &mut StackVec) {
+    memory.push(memory.size() as u16);
 }

src/instructions/meow.rs

@@ -1,5 +1,5 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn meow(memory: &mut Vec<u16>) {
-    println!("{}", memory.pop().expect(&format!("{}", RunError::MemoryEmpty)));
+pub fn meow(memory: &mut StackVec) {
+    println!("{}", memory.pop());
 }

src/instructions/modulo.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn modulo(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn modulo(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(b % a);
 }

src/instructions/mul.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn mul(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn mul(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(b * a);
 }

src/instructions/nand.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn nand(memory: &mut Vec<u16>) {
-    let a: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
-    let b: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
+pub fn nand(memory: &mut StackVec) {
+    let a: bool = memory.pop() == 1;
+    let b: bool = memory.pop() == 1;
 
     let c: u16 = if !(a && b) {
         1

src/instructions/not.rs

@@ -1,7 +1,7 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn not(memory: &mut Vec<u16>) {
-    let a: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
+pub fn not(memory: &mut StackVec) {
+    let a: bool = memory.pop() == 1;
     
     let c: u16 = if !a {
         1

src/instructions/or.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn or(memory: &mut Vec<u16>) {
-    let a: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
-    let b: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
+pub fn or(memory: &mut StackVec) {
+    let a: bool = memory.pop() == 1;
+    let b: bool = memory.pop() == 1;
 
     let c: u16 = if a || b {
         1

src/instructions/pick.rs

@@ -1,11 +1,11 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn pick(memory: &mut Vec<u16>, data: &u16) {
-    if *data > memory.len() as u16 {
+pub fn pick(memory: &mut StackVec, data: u16) {
+    if data > memory.len() as u16 {
         eprintln!("{}", RunError::PickTooDeep);
         std::process::exit(2);
     }
 
-    let arg = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+    let arg = memory.pop();
     memory.push(*memory.get(memory.len() - (arg as usize) - 1).expect(&format!("{}", RunError::PickOutOfBounds)));
 }

src/instructions/pop.rs

@@ -1,3 +1,5 @@
-pub fn pop(memory: &mut Vec<u16>) {
+use crate::stack::StackVec;
+
+pub fn pop(memory: &mut StackVec) {
     memory.pop();
 }

src/instructions/print.rs

@@ -1,3 +1,3 @@
-pub fn print(arg: &String) {
+pub fn print(arg: String) {
     print!("{}", arg);
 }

src/instructions/println.rs

@@ -1,3 +1,3 @@
-pub fn println(arg: &String) {
+pub fn println(arg: String) {
     println!("{}", arg);
 }

src/instructions/push.rs

@@ -1,3 +1,5 @@
-pub fn push(memory: &mut Vec<u16>, data: &u16) {
-    memory.push(*data);
+use crate::stack::StackVec;
+
+pub fn push(memory: &mut StackVec, data: u16) {
+    memory.push(data);
 }

src/instructions/putc.rs

@@ -1,5 +1,5 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn putc(memory: &mut Vec<u16>) {
-    print!("{}", memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) as u8 as char);
+pub fn putc(memory: &mut StackVec) {
+    print!("{}", memory.pop() as u8 as char);
 }

src/instructions/random.rs

@@ -1,7 +1,7 @@
 use fastrand;
-use crate::RunError;
+use crate::stack::StackVec;
 
-pub fn random(memory: &mut Vec<u16>) {
-    let data = &memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    memory.push(fastrand::u16(..) % (*data - 1));
+pub fn random(memory: &mut StackVec) {
+    let data = memory.pop();
+    memory.push(fastrand::u16(..) % (data - 1));
 }

src/instructions/scan.rs

@@ -1,6 +1,6 @@
-use crate::errors::RunError;
+use crate::{errors::RunError, stack::StackVec};
 
-pub fn scan(memory: &mut Vec<u16>) {
+pub fn scan(memory: &mut StackVec) {
     let mut input = String::new();
 
     std::io::stdin().read_line(&mut input).expect(&format!("{}", RunError::FailToReadLineFromConsole));

src/instructions/size.rs

@@ -1,3 +1,5 @@
-pub fn size(memory: &mut Vec<u16>) {
+use crate::stack::StackVec;
+
+pub fn size(memory: &mut StackVec) {
     memory.push(memory.len() as u16);
 }

src/instructions/sub.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn sub(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn sub(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(b - a);
 }

src/instructions/swap.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn swap(memory: &mut Vec<u16>) {
-    let a: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
-    let b: u16 = memory.pop().expect(&format!("{}", RunError::MemoryEmpty));
+pub fn swap(memory: &mut StackVec) {
+    let a: u16 = memory.pop();
+    let b: u16 = memory.pop();
 
     memory.push(a);
     memory.push(b);

src/instructions/xor.rs

@@ -1,8 +1,8 @@
-use crate::errors::RunError;
+use crate::stack::StackVec;
 
-pub fn xor(memory: &mut Vec<u16>) {
-    let a: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
-    let b: bool = memory.pop().expect(&format!("{}", RunError::MemoryEmpty)) == 1;
+pub fn xor(memory: &mut StackVec) {
+    let a: bool = memory.pop() == 1;
+    let b: bool = memory.pop() == 1;
 
     let c: u16 = if !a != !b {
         1

src/main.rs

@@ -17,6 +17,7 @@ labast - Labaski interpreter written in Rust.
 usage: labast [options] [ file.lb ]
 
 options:
+  --stack-size          sets stack max size (default: 256)
   -h, --help            prints help information
   -v, --version         prints version
 ";
@@ -30,7 +31,7 @@ fn main() {
         }
     };
 
-    let mut stack = Stack::new();
+    let mut stack = Stack::new(args.stack_size);
 
     if args.input.is_none() {
         let mut line = String::new();
@@ -46,21 +47,22 @@ fn main() {
 
             stdin.lock().read_line(&mut line).unwrap();
 
-            parse(&mut stack, &line.trim());
-            execute(&mut stack, None, &"inline".to_string());
+            parse(&mut stack, line.trim());
+            execute(&mut stack, None, "inline".to_string());
         }
     } else {
         let input = &args.input.expect("error: no input file");
         let lines = fs::read_to_string(&input).expect(&format!("{}", RunError::FailToReadFile));
 
         parse(&mut stack, &lines);
-        execute(&mut stack, None, &String::from(input.file_name().expect("Failed to read file name.").to_str().expect("Failed to convert file name to string")));
+        execute(&mut stack, None, String::from(input.file_name().expect("Failed to read file name.").to_str().expect("Failed to convert file name to string")));
     }
 }
 
 #[derive(Debug)]
 struct AppArgs {
     input: Option<std::path::PathBuf>,
+    stack_size: usize,
 }
 
 fn parse_args() -> Result<AppArgs, pico_args::Error> {
@@ -77,6 +79,7 @@ fn parse_args() -> Result<AppArgs, pico_args::Error> {
     }
 
     let args = AppArgs {
+        stack_size: pargs.opt_value_from_fn("--stack-size", parse_stack_size)?.unwrap_or(256),
         input: pargs.opt_free_from_str()?,
     };
 
@@ -86,4 +89,15 @@ fn parse_args() -> Result<AppArgs, pico_args::Error> {
     }
 
     return Ok(args);
+}
+
+fn parse_stack_size(s: &str) -> Result<usize, &'static str> {
+    let number = s.parse().map_err(|_| "Argument for stack size is not a number");
+    
+    if number > Ok(u16::MAX) {
+        eprintln!("Stack size cannot be more than 65535");
+        std::process::exit(2);
+    }
+
+    Ok(number?.into())
 }

src/stack.rs

@@ -1,3 +1,7 @@
+use std::ops::Deref;
+
+use crate::errors::StackError;
+
 #[derive(Clone, Debug)]
 pub struct Instruction {
     pub name: String,
@@ -5,21 +9,62 @@ pub struct Instruction {
     pub data: u16
 }
 
-#[derive(Clone, Debug)]
 pub struct Stack {
     pub program: Vec<Instruction>,
     pub program_counter: u16,
     pub labels: [Option<i16>; 256],
-    pub memory: Vec<u16>
+    pub memory: StackVec
 }
 
 impl Stack {
-    pub fn new() -> Stack {
+    pub fn new(stack_size: usize) -> Stack {
         return Stack {
             program: Vec::new(),
             program_counter: 0,
             labels: [None; 256],
-            memory: Vec::new()
+            memory: StackVec::new(stack_size)
         };
     }
+}
+
+pub struct StackVec {
+    data: Vec<u16>,
+    max_size: usize
+}
+
+impl StackVec {
+    fn new(max_size: usize) -> Self {
+        StackVec {
+            data: Vec::new(),
+            max_size,
+        }
+    }
+
+    pub fn size(&self) -> usize {
+        self.max_size
+    }
+
+    pub fn push(&mut self, item: u16) {
+        if self.data.len() + 1 > self.max_size {
+            panic!("{}", StackError::StackOverflow);
+        } else {
+            self.data.push(item);
+        }
+    }
+
+    pub fn pop(&mut self) -> u16 {
+        self.data.pop().expect(&format!("{}", StackError::StackUnderflow))
+    }
+
+    pub fn last(&mut self) -> u16 {
+        *self.data.last().expect(&format!("{}", StackError::StackUnderflow))
+    }
+}
+
+impl Deref for StackVec {
+    type Target = Vec<u16>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.data
+    }
 }