🚀 Raven Production Readiness Roadmap¶

Current State Analysis¶

✅ What We Have (MVP Complete)¶

Complete lexer with all basic tokens
Full parser for core language features
Static type checker
Tree-walking interpreter
CLI tool with multiple modes
Basic examples and documentation

❌ What's Missing for Production¶

📋 PHASE 1: Core Language Improvements (Essential)¶

1.1 Error Handling & Reporting ⭐⭐⭐⭐⭐ (CRITICAL)¶

Current Problem: Error messages lack context

❌ Parse error: Expected ';' after assignment.

Need: Rich error messages with line numbers, column numbers, and context

Error: Expected ';' after assignment
  --> program.rv:5:18
   |
 5 | let x: int = 10
   |                ^ missing semicolon here
   |
Help: Add ';' at the end of the statement

Implementation Checklist: - [ ] Add line/column tracking to Lexer - [ ] Add source position to all AST nodes - [ ] Create Error struct with position information - [ ] Implement error formatting with source context - [ ] Add "Did you mean?" suggestions - [ ] Color-coded error output

Files to Create/Modify: - src/error.rs - Error types and formatting - src/lexer.rs - Add position tracking - src/parser.rs - Attach positions to AST nodes - src/span.rs - Source span (line, column) tracking

Estimated Time: 1 week

1.2 Operator Precedence & Associativity ⭐⭐⭐⭐⭐ (CRITICAL)¶

Current Problem: Left-to-right parsing, no precedence

let x = 2 + 3 * 4;  // Currently: (2 + 3) * 4 = 20
                     // Should be: 2 + (3 * 4) = 14

Need: Proper operator precedence using Pratt parsing or precedence climbing

Implementation Checklist: - [ ] Implement precedence table - [ ] Rewrite parse_expression() with precedence climbing - [ ] Add parenthesized expressions support - [ ] Support unary operators (-, !) - [ ] Add modulo operator (%)

Precedence Table (highest to lowest):

1. Parentheses: ()
2. Unary: !, -, +
3. Multiplicative: *, /, %
4. Additive: +, -
5. Comparison: <, >, <=, >=
6. Equality: ==, !=
7. Logical AND: &&
8. Logical OR: ||

Files to Modify: - src/parser.rs - Replace parse_expression() - src/ast.rs - Add UnaryOp expression

Estimated Time: 3-4 days

1.3 Variable Scoping ⭐⭐⭐⭐☆ (HIGH PRIORITY)¶

Current Problem: All variables are global

Need: Block-level scoping

let x: int = 10;
if (true) {
    let x: int = 20;  // Different x, shadows outer
    print(x);  // 20
}
print(x);  // 10

Implementation Checklist: - [ ] Add scope stack to interpreter - [ ] Push/pop scopes on block entry/exit - [ ] Update variable lookup to search scope chain - [ ] Add scope to type checker - [ ] Support variable shadowing

Files to Modify: - src/code_gen.rs - Add scope management - src/type_checker.rs - Add scope checking

Estimated Time: 2-3 days

1.4 Function Calling ⭐⭐⭐⭐⭐ (CRITICAL)¶

Current Problem: Functions can be declared but NOT called!

Need: Function call expressions

fun add(a: int, b: int) -> int {
    return a + b;
}

let result: int = add(5, 10);  // ← This doesn't work yet!
print(result);

Implementation Checklist: - [ ] Add FunctionCall expression to AST - [ ] Parse function call syntax: name(arg1, arg2) - [ ] Type check function calls (arg count, arg types) - [ ] Implement function execution in interpreter - [ ] Support return values

Files to Modify: - src/ast.rs - Add Expression::FunctionCall - src/parser.rs - Parse function calls - src/type_checker.rs - Validate calls - src/code_gen.rs - Execute calls

Estimated Time: 3-4 days

1.5 Arrays/Lists ⭐⭐⭐⭐☆ (HIGH PRIORITY)¶

Status: Core array support is implemented in the reference interpreter (1D and multi-dimensional types, literals, indexing, assignment, len(), and common array methods).

Need (historical sketch; syntax below is illustrative):

let numbers: int[] = [1, 2, 3, 4, 5];
print(numbers[0]);  // 1

let length: int = len(numbers);  // 5

Implementation Checklist: - [x] Add array type to type system (including nested [][] / [][][] types) - [x] Parse array literals [1, 2, 3] - [x] Parse array access arr[index] and chained arr[i][j] / arr[i][j][k] - [x] Implement array indexing - [x] Add len() built-in function - [x] Support array assignment arr[i] = value and nested arr[i][j] = value

Files to Create/Modify: - src/ast.rs - Add array expressions - src/type_checker.rs - Array type checking - src/code_gen.rs - Array runtime support

Estimated Time: 1 week

1.6 string Operations ⭐⭐⭐☆☆ (MEDIUM PRIORITY)¶

Need: string manipulation

let name: string = "Raven";
let len: int = len(name);  // 5

let first: string = name[0];  // "R"
let upper: string = uppercase(name);  // "RAVEN"

Implementation Checklist: - [ ] string indexing - [ ] string slicing - [ ] string concatenation (already have +) - [ ] Built-in string functions

Estimated Time: 3-4 days

📋 PHASE 2: Standard Library Foundation¶

2.1 Built-in Functions System ⭐⭐⭐⭐⭐ (CRITICAL)¶

Need: Infrastructure for built-in functions

Core Built-ins Needed:

// Type conversion
int(value)
float(value)
string(value)
bool(value)

// I/O
print(value)
println(value)
input(prompt: string) -> string

// Collections
len(collection) -> int
push(array, value)
pop(array) -> value

// Math
abs(n: int) -> int
pow(base: int, exp: int) -> int
sqrt(n: float) -> float
min(a: int, b: int) -> int
max(a: int, b: int) -> int

// string
uppercase(s: string) -> string
lowercase(s: string) -> string
trim(s: string) -> string
split(s: string, delim: string) -> [string]

Implementation Checklist: - [ ] Create src/builtins.rs - [ ] Register built-ins in interpreter - [ ] Type check built-in calls - [ ] Implement each built-in function

Files to Create: - src/builtins.rs - Built-in function registry - src/stdlib/mod.rs - Standard library module system

Estimated Time: 1 week

2.2 Module System ⭐⭐⭐⭐☆ (HIGH PRIORITY)¶

Need: Import/export mechanism

// math.rv
fun add(a: int, b: int) -> int {
    return a + b;
}

// main.rv
import math;

let result: int = math.add(5, 10);

Implementation Checklist: - [ ] Parse import statements - [ ] File resolution system - [ ] Module caching - [ ] Namespace management - [ ] Circular import detection

Files to Create: - src/module.rs - Module loader and resolver - stdlib/ - Standard library modules directory

Estimated Time: 1-2 weeks

2.3 Standard Library Modules¶

2.3.1 `io` Module¶

import io;

let content: string = io.read_file("data.txt");
io.write_file("output.txt", content);

let line: string = io.read_line();

Functions: - read_file(path: string) -> string - write_file(path: string, content: string) -> void - read_line() -> string - file_exists(path: string) -> bool

2.3.2 `math` Module¶

import math;

let pi: float = math.pi;
let result: float = math.sin(1.57);
let rounded: int = math.round(3.7);

Constants: - pi, e

Functions: - sin, cos, tan - sqrt, pow, abs - floor, ceil, round - min, max

2.3.3 `string` Module¶

import str from "str";

let upper: string = string.uppercase("hello");
let parts: [string] = string.split("a,b,c", ",");
let joined: string = string.join(parts, "-");

Functions: - uppercase, lowercase - split, join - trim, starts_with, ends_with - replace, contains

2.3.4 `collections` Module (Advanced)¶

import collections;

let map: Map<string, int> = collections.new_map();
map.set("age", 25);
let age: int = map.get("age");

let set: Set<int> = collections.new_set();
set.add(5);

📋 PHASE 3: Advanced Features¶

3.1 Structs & Methods ⭐⭐⭐⭐☆¶

struct Person {
    name: string;
    age: int;
}

fun Person.greet(self) -> void {
    print(self.name);
}

let p: Person = Person { name: "Alice", age: 25 };
p.greet();

3.2 Enums ⭐⭐⭐☆☆¶

enum Color {
    Red,
    Green,
    Blue
}

let c: Color = Color.Red;

3.3 Pattern Matching ⭐⭐⭐☆☆¶

match value {
    0 => print("zero"),
    1 => print("one"),
    _ => print("other")
}

3.4 Error Handling ⭐⭐⭐⭐☆¶

enum Result<T, E> {
    Ok(T),
    Err(E)
}

fun divide(a: int, b: int) -> Result<int, string> {
    if (b == 0) {
        return Result.Err("Division by zero");
    }
    return Result.Ok(a / b);
}

📋 PHASE 4: Tooling & Developer Experience¶

4.1 REPL ⭐⭐⭐⭐☆¶

$ raven repl
>>> let x: int = 5;
>>> print(x + 10);
15

Implementation: - [ ] Line-by-line parsing - [ ] Persistent state - [ ] History support - [ ] Tab completion

Estimated Time: 3-4 days

4.2 Package Manager ⭐⭐⭐⭐☆¶

# raven.toml
[package]
name = "my_project"
version = "0.1.0"

[dependencies]
http = "1.0"
json = "0.5"

raven install
raven build
raven run

4.3 Formatter ⭐⭐⭐☆☆¶

raven fmt program.rv

4.4 Linter ⭐⭐⭐☆☆¶

raven lint program.rv

Checks: - Unused variables - Dead code - Style violations - Potential bugs

4.5 Language Server Protocol (LSP) ⭐⭐⭐⭐☆¶

For IDE support: - Autocomplete - Go to definition - Find references - Inline errors - Hover documentation

📋 PHASE 5: Performance & Compilation¶

5.1 Bytecode VM ⭐⭐⭐⭐⭐¶

See docs/compilation_guide.md
5-10x performance improvement
Estimated Time: 1-2 weeks

5.2 JIT Compilation ⭐⭐⭐⭐☆¶

Runtime compilation to machine code
50-100x performance improvement
Estimated Time: 2-3 months

5.3 AOT Compilation (LLVM) ⭐⭐⭐⭐⭐¶

Compile to native executables
Maximum performance
Estimated Time: 2-3 months

🎯 Recommended Implementation Order¶

Immediate (Next 2 Weeks):¶

✅ Error reporting with line numbers (Week 1)
✅ Operator precedence (Week 1)
✅ Function calling (Week 2)
✅ Variable scoping (Week 2)

Short Term (Next Month):¶

✅ Arrays/Lists
✅ Built-in functions
✅ string operations
✅ REPL

Medium Term (2-3 Months):¶

✅ Module system
✅ Standard library (io, math, string)
✅ Structs
✅ Bytecode VM

Long Term (3-6 Months):¶

✅ Enums & pattern matching
✅ Error handling (Result type)
✅ Package manager
✅ LSP server
✅ LLVM backend

📊 Priority Matrix¶

Feature	Priority	Difficulty	Impact	Time
Error reporting	⭐⭐⭐⭐⭐	Medium	High	1 week
Operator precedence	⭐⭐⭐⭐⭐	Medium	High	3 days
Function calling	⭐⭐⭐⭐⭐	Medium	Critical	4 days
Variable scoping	⭐⭐⭐⭐☆	Medium	High	3 days
Arrays	⭐⭐⭐⭐☆	Medium	High	1 week
Built-ins	⭐⭐⭐⭐⭐	Easy	High	1 week
Module system	⭐⭐⭐⭐☆	Hard	High	2 weeks
REPL	⭐⭐⭐⭐☆	Easy	Medium	4 days
Bytecode VM	⭐⭐⭐⭐⭐	Hard	Very High	2 weeks
Structs	⭐⭐⭐⭐☆	Hard	High	2 weeks

🎓 Next Steps¶

Start with this order:

Error Reporting - Makes development much easier
Operator Precedence - Fixes critical bug
Function Calling - Makes language actually useful
Variable Scoping - Prevents bugs
Built-in Functions - Enables real programs
Arrays - Essential data structure

After these 6 features, Raven will be genuinely useful for real programs!

Total estimated time for "production ready" core: 6-8 weeks

🚀 Raven Production Readiness Roadmap¶

Current State Analysis¶

✅ What We Have (MVP Complete)¶

❌ What's Missing for Production¶

📋 PHASE 1: Core Language Improvements (Essential)¶

1.1 Error Handling & Reporting ⭐⭐⭐⭐⭐ (CRITICAL)¶

1.2 Operator Precedence & Associativity ⭐⭐⭐⭐⭐ (CRITICAL)¶

1.3 Variable Scoping ⭐⭐⭐⭐☆ (HIGH PRIORITY)¶

1.4 Function Calling ⭐⭐⭐⭐⭐ (CRITICAL)¶

1.5 Arrays/Lists ⭐⭐⭐⭐☆ (HIGH PRIORITY)¶

1.6 string Operations ⭐⭐⭐☆☆ (MEDIUM PRIORITY)¶

📋 PHASE 2: Standard Library Foundation¶

2.1 Built-in Functions System ⭐⭐⭐⭐⭐ (CRITICAL)¶

2.2 Module System ⭐⭐⭐⭐☆ (HIGH PRIORITY)¶

2.3 Standard Library Modules¶

2.3.1 io Module¶

2.3.2 math Module¶

2.3.3 string Module¶

2.3.4 collections Module (Advanced)¶

📋 PHASE 3: Advanced Features¶

3.1 Structs & Methods ⭐⭐⭐⭐☆¶

3.2 Enums ⭐⭐⭐☆☆¶

3.3 Pattern Matching ⭐⭐⭐☆☆¶

3.4 Error Handling ⭐⭐⭐⭐☆¶

📋 PHASE 4: Tooling & Developer Experience¶

4.1 REPL ⭐⭐⭐⭐☆¶

4.2 Package Manager ⭐⭐⭐⭐☆¶

4.3 Formatter ⭐⭐⭐☆☆¶

4.4 Linter ⭐⭐⭐☆☆¶

4.5 Language Server Protocol (LSP) ⭐⭐⭐⭐☆¶

📋 PHASE 5: Performance & Compilation¶

5.1 Bytecode VM ⭐⭐⭐⭐⭐¶

5.2 JIT Compilation ⭐⭐⭐⭐☆¶

5.3 AOT Compilation (LLVM) ⭐⭐⭐⭐⭐¶

🎯 Recommended Implementation Order¶

Immediate (Next 2 Weeks):¶

Short Term (Next Month):¶

Medium Term (2-3 Months):¶

Long Term (3-6 Months):¶

📊 Priority Matrix¶

🎓 Next Steps¶

2.3.1 `io` Module¶

2.3.2 `math` Module¶

2.3.3 `string` Module¶

2.3.4 `collections` Module (Advanced)¶