Very minimal, but e2e hello world sort of working.

Cargo.lock

@@ -86,9 +86,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "4.5.23"
+version = "4.5.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3135e7ec2ef7b10c6ed8950f0f792ed96ee093fa088608f1c76e569722700c84"
+checksum = "2797f34da339ce31042b27d23607e051786132987f595b02ba4f6a6dffb7030a"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -96,9 +96,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.23"
+version = "4.5.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30582fc632330df2bd26877bde0c1f4470d57c582bbc070376afcd04d8cb4838"
+checksum = "24a241312cea5059b13574bb9b3861cabf758b879c15190b37b6d6fd63ab6876"
 dependencies = [
  "anstream",
  "anstyle",
@@ -108,9 +108,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.18"
+version = "4.5.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ac6a0c7b1a9e9a5186361f67dfa1b88213572f427fb9ab038efb2bd8c582dab"
+checksum = "a92793da1a46a5f2a02a6f4c46c6496b28c43638adea8306fcb0caa1634f24e5"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -120,9 +120,9 @@ dependencies = [
 
 [[package]]
 name = "clap_lex"
-version = "0.7.4"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
+checksum = "3a822ea5bc7590f9d40f1ba12c0dc3c2760f3482c6984db1573ad11031420831"
 
 [[package]]
 name = "codespan-reporting"
@@ -135,6 +135,17 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "codespan-reporting"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af491d569909a7e4dee0ad7db7f5341fef5c614d5b8ec8cf765732aba3cff681"
+dependencies = [
+ "serde",
+ "termcolor",
+ "unicode-width",
+]
+
 [[package]]
 name = "colorchoice"
 version = "1.0.3"
@@ -186,7 +197,7 @@ version = "0.1.0"
 dependencies = [
  "ast-generator",
  "clap",
- "codespan-reporting",
+ "codespan-reporting 0.12.0",
  "cst-test-generator",
  "indoc",
  "log",
@@ -204,9 +215,26 @@ dependencies = [
  "crypto-common",
 ]
 
+[[package]]
+name = "dm"
+version = "0.1.0"
+dependencies = [
+ "clap",
+ "codespan-reporting 0.13.1",
+ "dmc-lib",
+ "dvm-lib",
+]
+
 [[package]]
 name = "dmc-lib"
 version = "0.1.0"
+dependencies = [
+ "dvm-lib",
+]
+
+[[package]]
+name = "dvm-lib"
+version = "0.1.0"
 
 [[package]]
 name = "encoding_rs"

Cargo.toml

@@ -3,9 +3,9 @@ name = "deimos"
 version = "0.1.0"
 edition = "2021"
 
-[[bin]]
-name = "dm"
-path = "src/bin/dvm/main.rs"
+#[[bin]]
+#name = "dm"
+#path = "src/bin/dvm/main.rs"
 
 [[bin]]
 name = "dmc"
@@ -25,4 +25,4 @@ cst-test-generator = { path = "cst-test-generator" }
 
 [workspace]
 resolver = "3"
-members = ["ast-generator", "cst-test-generator", "dmc-lib"]
+members = ["ast-generator", "cst-test-generator", "dm", "dmc-lib", "dvm-lib"]

dm/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "dm"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+dmc-lib = { path = "../dmc-lib" }
+dvm-lib = { path = "../dvm-lib" }
+clap = { version = "4.5.60", features = ["derive"] }
+codespan-reporting = "0.13.1"

dm/src/main.rs

@@ -0,0 +1,72 @@
+use clap::Parser;
+use dmc_lib::constants_table::ConstantsTable;
+use dmc_lib::diagnostic::Diagnostic;
+use dmc_lib::parser::parse_compilation_unit;
+use dmc_lib::symbol_table::SymbolTable;
+use dvm_lib::vm::constant::{Constant, StringConstant};
+use dvm_lib::vm::{DvmContext, DvmState, call};
+use std::path::PathBuf;
+use std::rc::Rc;
+
+#[derive(Debug, Parser)]
+#[command(name = "dm", about = "Deimos", version = "0.1.0", long_about = None)]
+struct Cli {
+    script: PathBuf,
+
+    #[arg(long)]
+    show_asm: bool,
+}
+
+fn main() {
+    let args = Cli::parse();
+    let input = std::fs::read_to_string(&args.script).unwrap();
+
+    let mut compilation_unit = parse_compilation_unit(&input);
+    let mut symbol_table = SymbolTable::new();
+
+    let gather_names_diagnostics = compilation_unit.gather_declared_names(&mut symbol_table);
+    check_and_report_diagnostics(&gather_names_diagnostics);
+
+    let name_usages_diagnostics = compilation_unit.check_name_usages(&symbol_table);
+    check_and_report_diagnostics(&name_usages_diagnostics);
+
+    let type_check_diagnostics = compilation_unit.type_check(&symbol_table);
+    check_and_report_diagnostics(&type_check_diagnostics);
+
+    let mut constants_table = ConstantsTable::new();
+    let asm_functions = compilation_unit.assemble(&symbol_table, &mut constants_table);
+
+    if args.show_asm {
+        for asm_function in &asm_functions {
+            println!("{:?}", asm_function);
+        }
+    }
+
+    let mut dvm_context = DvmContext::new();
+
+    for asm_function in &asm_functions {
+        let function = asm_function.dvm();
+        dvm_context.add_function(function);
+    }
+
+    for (name, content) in &constants_table.string_constants() {
+        dvm_context.add_constant(Constant::String(StringConstant::new(
+            Rc::from(name.clone()),
+            content.as_str(),
+        )));
+    }
+
+    let mut dvm_state = DvmState::new();
+
+    let result = call(&dvm_context, &mut dvm_state, "main", vec![]);
+    println!("{:?}", result);
+}
+
+fn check_and_report_diagnostics(diagnostics: &[Diagnostic]) {
+    if !diagnostics.is_empty() {
+        for diagnostic in diagnostics {
+            println!("{:?}", diagnostic);
+        }
+        std::process::exit(1);
+    }
+}

dmc-lib/Cargo.toml

@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+dvm-lib = { path = "../dvm-lib" }

dmc-lib/src/asm/asm_block.rs

@@ -13,4 +13,8 @@ impl AsmBlock {
             instructions,
         }
     }
+
+    pub fn instructions(&self) -> &[AsmInstruction] {
+        &self.instructions
+    }
 }

dmc-lib/src/asm/asm_function.rs

@@ -1,4 +1,6 @@
 use crate::asm::asm_block::AsmBlock;
+use crate::asm::asm_instruction::AsmInstruction;
+use dvm_lib::vm::function::Function;
 
 #[derive(Debug)]
 pub struct AsmFunction {
@@ -13,4 +15,15 @@ impl AsmFunction {
             blocks,
         }
     }
+
+    pub fn dvm(&self) -> Function {
+        // very naive impl
+        let dvm_instructions = self
+            .blocks
+            .iter()
+            .flat_map(|block| block.instructions().iter().map(AsmInstruction::dvm))
+            .collect::<Vec<_>>();
+
+        Function::new(&self.name, dvm_instructions, 16)
+    }
 }

dmc-lib/src/asm/asm_instruction.rs

@@ -1,3 +1,6 @@
+use dvm_lib::instruction::Instruction;
+use std::rc::Rc;
+
 #[derive(Debug)]
 pub enum AsmInstruction {
     Move(Move),
@@ -7,11 +10,25 @@ pub enum AsmInstruction {
     LoadConstant(LoadConstant),
 }
 
+impl AsmInstruction {
+    pub fn dvm(&self) -> Instruction {
+        match self {
+            AsmInstruction::Move(asm_move) => asm_move.dvm(),
+            AsmInstruction::Push(push) => push.dvm(),
+            AsmInstruction::Pop(pop) => pop.dvm(),
+            AsmInstruction::InvokePlatformStatic(invoke_platform_static) => {
+                invoke_platform_static.dvm()
+            }
+            AsmInstruction::LoadConstant(load_constant) => load_constant.dvm(),
+        }
+    }
+}
+
 #[derive(Debug)]
 pub enum Operand {
-    IntegerLiteral(i64),
+    IntegerLiteral(i32),
     Register(usize),
-    StackFrameOffset(usize),
+    StackFrameOffset(isize),
 }
 
 #[derive(Debug)]
@@ -27,6 +44,18 @@ impl Move {
             destination_register,
         }
     }
+
+    pub fn dvm(&self) -> Instruction {
+        match self.source {
+            Operand::IntegerLiteral(i) => Instruction::MoveInt(i, self.destination_register),
+            Operand::Register(register) => {
+                Instruction::MoveRegister(register, self.destination_register)
+            }
+            Operand::StackFrameOffset(offset) => {
+                Instruction::MoveStackFrameOffset(offset, self.destination_register)
+            }
+        }
+    }
 }
 
 #[derive(Debug)]
@@ -38,19 +67,37 @@ impl Push {
     pub fn new(source: Operand) -> Self {
         Self { source }
     }
+
+    pub fn dvm(&self) -> Instruction {
+        match self.source {
+            Operand::IntegerLiteral(i) => Instruction::PushInt(i),
+            Operand::Register(register) => Instruction::PushRegister(register),
+            Operand::StackFrameOffset(offset) => Instruction::PushStackFrameOffset(offset),
+        }
+    }
 }
 
 #[derive(Debug)]
 pub struct Pop {
-    destination_register: usize,
+    destination_register: Option<usize>,
 }
 
 impl Pop {
     pub fn new(destination_register: usize) -> Self {
         Self {
-            destination_register,
+            destination_register: Some(destination_register),
         }
     }
+
+    pub fn empty() -> Self {
+        Self {
+            destination_register: None,
+        }
+    }
+
+    pub fn dvm(&self) -> Instruction {
+        Instruction::Pop(self.destination_register)
+    }
 }
 
 #[derive(Debug)]
@@ -62,6 +109,10 @@ impl InvokePlatformStatic {
     pub fn new(name: &str) -> Self {
         Self { name: name.into() }
     }
+
+    pub fn dvm(&self) -> Instruction {
+        Instruction::InvokePlatformStatic(Rc::from(self.name.clone()))
+    }
 }
 
 #[derive(Debug)]
@@ -77,4 +128,8 @@ impl LoadConstant {
             destination_register,
         }
     }
+
+    pub fn dvm(&self) -> Instruction {
+        Instruction::LoadStringConstant(Rc::from(self.name.clone()), self.destination_register)
+    }
 }

dmc-lib/src/ast/integer_literal.rs

@@ -3,19 +3,19 @@ use crate::ir::ir_expression::IrExpression;
 use crate::source_range::SourceRange;
 
 pub struct IntegerLiteral {
-    value: i64,
+    value: i32,
     source_range: SourceRange,
 }
 
 impl IntegerLiteral {
-    pub fn new(value: i64, source_range: SourceRange) -> Self {
+    pub fn new(value: i32, source_range: SourceRange) -> Self {
         Self {
             value,
             source_range,
         }
     }
 
-    pub fn value(&self) -> i64 {
+    pub fn value(&self) -> i32 {
         self.value
     }
 

dmc-lib/src/constants_table.rs

@@ -19,4 +19,12 @@ impl ConstantsTable {
         self.strings_to_names.insert(s.into(), name.clone());
         name
     }
+
+    pub fn string_constants(&self) -> HashMap<String, String> {
+        let mut constants = HashMap::new();
+        self.strings_to_names.iter().for_each(|(content, name)| {
+            constants.insert(name.clone(), content.clone());
+        });
+        constants
+    }
 }

dmc-lib/src/ir/ir_expression.rs

@@ -6,6 +6,6 @@ use crate::ir::ir_variable::IrVariable;
 pub enum IrExpression {
     Call(IrCall),
     Constant(IrConstant),
-    IntegerLiteral(i64),
+    IntegerLiteral(i32),
     Variable(IrVariable),
 }

dmc-lib/src/lib.rs

@@ -1,13 +1,13 @@
-mod asm;
-mod ast;
-mod constants_table;
-mod diagnostic;
-mod ir;
-mod lexer;
-mod parser;
-mod scope;
-mod source_range;
-mod symbol;
-mod symbol_table;
-mod token;
-mod type_info;
+pub mod asm;
+pub mod ast;
+pub mod constants_table;
+pub mod diagnostic;
+pub mod ir;
+pub mod lexer;
+pub mod parser;
+pub mod scope;
+pub mod source_range;
+pub mod symbol;
+pub mod symbol_table;
+pub mod token;
+pub mod type_info;

dmc-lib/src/parser.rs

@@ -181,7 +181,7 @@ impl<'a> Parser<'a> {
                 let source_range = SourceRange::new(current.start(), current.end());
                 self.advance();
                 Expression::IntegerLiteral(IntegerLiteral::new(
-                    i64::from_str(raw).unwrap(),
+                    i32::from_str(raw).unwrap(),
                     source_range,
                 ))
             }

dmc-lib/src/symbol.rs

@@ -35,7 +35,7 @@ impl FunctionSymbol {
 pub struct ParameterSymbol {
     name: Rc<str>,
     type_info: TypeInfo,
-    stack_frame_offset: Option<usize>,
+    stack_frame_offset: Option<isize>,
 }
 
 impl ParameterSymbol {
@@ -59,11 +59,11 @@ impl ParameterSymbol {
         &self.type_info
     }
 
-    pub fn set_stack_frame_offset(&mut self, offset: usize) {
+    pub fn set_stack_frame_offset(&mut self, offset: isize) {
         self.stack_frame_offset = Some(offset);
     }
 
-    pub fn stack_frame_offset(&self) -> usize {
+    pub fn stack_frame_offset(&self) -> isize {
         self.stack_frame_offset.unwrap()
     }
 }

dvm-lib/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "dvm-lib"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

dvm-lib/src/instruction.rs

@@ -0,0 +1,21 @@
+use std::rc::Rc;
+
+pub type Register = usize;
+pub type ConstantName = Rc<str>;
+pub type FunctionName = Rc<str>;
+
+pub enum Instruction {
+    MoveRegister(Register, Register),
+    MoveInt(i32, Register),
+    MoveStackFrameOffset(isize, Register),
+
+    PushRegister(Register),
+    PushInt(i32),
+    PushStackFrameOffset(isize),
+
+    InvokePlatformStatic(FunctionName),
+
+    LoadStringConstant(ConstantName, Register),
+
+    Pop(Option<Register>),
+}

dvm-lib/src/lib.rs

@@ -0,0 +1,2 @@
+pub mod instruction;
+pub mod vm;

dvm-lib/src/vm/constant.rs

@@ -0,0 +1,31 @@
+use std::rc::Rc;
+
+pub enum Constant {
+    String(StringConstant),
+}
+
+pub struct StringConstant {
+    name: Rc<str>,
+    content: Rc<str>,
+}
+
+impl StringConstant {
+    pub fn new(name: Rc<str>, content: &str) -> Self {
+        Self {
+            name,
+            content: content.into(),
+        }
+    }
+
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+
+    pub fn name_owned(&self) -> Rc<str> {
+        self.name.clone()
+    }
+
+    pub fn content_owned(&self) -> Rc<str> {
+        self.content.clone()
+    }
+}

dvm-lib/src/vm/function.rs

@@ -0,0 +1,34 @@
+use crate::instruction::Instruction;
+use std::rc::Rc;
+
+pub struct Function {
+    name: Rc<str>,
+    instructions: Vec<Instruction>,
+    register_count: usize,
+}
+
+impl Function {
+    pub fn new(name: &str, instructions: Vec<Instruction>, register_count: usize) -> Self {
+        Self {
+            name: name.into(),
+            instructions,
+            register_count,
+        }
+    }
+
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+
+    pub fn name_owned(&self) -> Rc<str> {
+        self.name.clone()
+    }
+
+    pub fn instructions(&self) -> &Vec<Instruction> {
+        &self.instructions
+    }
+
+    pub fn register_count(&self) -> usize {
+        self.register_count
+    }
+}

dvm-lib/src/vm/mod.rs

@@ -0,0 +1,187 @@
+use crate::instruction::Instruction;
+use crate::vm::constant::Constant;
+use crate::vm::function::Function;
+use crate::vm::value::Value;
+use std::collections::HashMap;
+use std::rc::Rc;
+
+pub mod constant;
+pub mod function;
+pub mod value;
+
+pub struct DvmContext {
+    functions: HashMap<Rc<str>, Function>,
+    constants: HashMap<Rc<str>, Constant>,
+}
+
+impl DvmContext {
+    pub fn new() -> Self {
+        Self {
+            functions: HashMap::new(),
+            constants: HashMap::new(),
+        }
+    }
+
+    pub fn add_function(&mut self, function: Function) {
+        self.functions.insert(function.name_owned(), function);
+    }
+
+    pub fn constants(&self) -> &HashMap<Rc<str>, Constant> {
+        &self.constants
+    }
+
+    pub fn add_constant(&mut self, constant: Constant) {
+        match &constant {
+            Constant::String(string_constant) => {
+                self.constants
+                    .insert(string_constant.name_owned(), constant);
+            }
+        }
+    }
+}
+
+pub struct DvmState {
+    stack: Vec<Value>,
+    registers: Vec<Value>,
+    ip: usize,
+    fp: usize,
+}
+
+impl DvmState {
+    pub fn new() -> Self {
+        Self {
+            stack: vec![],
+            registers: vec![],
+            ip: 0,
+            fp: 0,
+        }
+    }
+
+    pub fn stack(&self) -> &Vec<Value> {
+        &self.stack
+    }
+
+    pub fn stack_mut(&mut self) -> &mut Vec<Value> {
+        &mut self.stack
+    }
+
+    pub fn registers(&self) -> &Vec<Value> {
+        &self.registers
+    }
+
+    pub fn registers_mut(&mut self) -> &mut Vec<Value> {
+        &mut self.registers
+    }
+
+    pub fn ensure_registers(&mut self, count: usize) {
+        self.registers.resize_with(count, Default::default);
+    }
+
+    pub fn ip(&self) -> usize {
+        self.ip
+    }
+
+    pub fn increment_ip(&mut self) {
+        self.ip += 1;
+    }
+
+    pub fn fp(&self) -> usize {
+        self.fp
+    }
+
+    pub fn set_fp(&mut self, fp: usize) {
+        self.fp = fp;
+    }
+}
+
+pub fn call(
+    context: &DvmContext,
+    state: &mut DvmState,
+    function_name: &str,
+    arguments: Vec<Value>,
+) -> Option<Value> {
+    let function = context
+        .functions
+        .get(function_name)
+        .expect(&format!("Function {} not found", function_name));
+
+    let instructions = function.instructions();
+    state.ensure_registers(function.register_count());
+
+    // put each arg on the stack
+    for argument in arguments {
+        state.stack_mut().push(argument);
+    }
+
+    while state.ip() < instructions.len() {
+        let instruction = &instructions[state.ip()];
+        match instruction {
+            /* Move instructions */
+            Instruction::MoveRegister(source, destination) => {
+                // copy value from one register to another register
+                let value = state.registers()[*source].clone();
+                state.registers_mut()[*destination] = value;
+            }
+            Instruction::MoveInt(value, destination) => {
+                state.registers_mut()[*destination] = Value::Int(*value);
+            }
+            Instruction::MoveStackFrameOffset(offset, destination) => {
+                // copy a value offset from the current frame pointer (fp) to a register
+                let value_index = state
+                    .fp()
+                    .checked_add_signed(*offset)
+                    .expect("Overflow when adding offset to fp");
+                let value = state.stack()[value_index].clone();
+                state.registers_mut()[*destination] = value;
+            }
+
+            /* Push instructions */
+            Instruction::PushRegister(source) => {
+                // copy a value from a register to the top of the stack
+                let value = state.registers()[*source].clone();
+                state.stack_mut().push(value);
+            }
+            Instruction::PushInt(value) => {
+                state.stack_mut().push(Value::Int(*value));
+            }
+            Instruction::PushStackFrameOffset(offset) => {
+                // copy a value from somewhere on the stack to the top of the stack
+                let value_index = state
+                    .fp()
+                    .checked_add_signed(*offset)
+                    .expect("Overflow when adding offset to fp");
+                let value = state.stack()[value_index].clone();
+                state.stack_mut().push(value);
+            }
+
+            /* Invoke instructions */
+            Instruction::InvokePlatformStatic(function_name) => {
+                if function_name.as_ref() == "println" {
+                    println!("{:?}", state.stack());
+                    println!("{:?}", state.registers());
+                }
+            }
+
+            /* Load constant instructions */
+            Instruction::LoadStringConstant(constant_name, destination) => {
+                let constant = &context.constants()[constant_name];
+                match constant {
+                    Constant::String(string_constant) => {
+                        state.registers_mut()[*destination] =
+                            Value::String(string_constant.content_owned());
+                    }
+                }
+            }
+
+            /* Pop instructions */
+            Instruction::Pop(maybe_register) => {
+                let value = state.stack_mut().pop().unwrap();
+                if let Some(register) = maybe_register {
+                    state.registers_mut()[*register] = value;
+                }
+            }
+        }
+        state.increment_ip();
+    }
+    None
+}

dvm-lib/src/vm/value.rs

@@ -0,0 +1,14 @@
+use std::rc::Rc;
+
+#[derive(Clone, Debug)]
+pub enum Value {
+    Int(i32),
+    String(Rc<str>),
+    Null,
+}
+
+impl Default for Value {
+    fn default() -> Value {
+        Value::Null
+    }
+}

examples/hello.dm

@@ -0,0 +1,6 @@
+fn println() end
+
+fn main()
+    let x = "Hello, World!"
+    println(x)
+end