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runtime type checking

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This commit is contained in:
Shautvast 2025-10-22 16:54:51 +02:00
parent e2ddf94a00
commit 5243e46dce
5 changed files with 217 additions and 42 deletions
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7
src/chunk.rs
View file

@ -3,7 +3,7 @@ use crate::value::Value;
use crate::vm::{
OP_ADD, OP_BITAND, OP_BITOR, OP_BITXOR, OP_CONSTANT, OP_DIVIDE, OP_FALSE, OP_MULTIPLY,
OP_NEGATE, OP_RETURN, OP_SUBTRACT, OP_TRUE, OP_NOT, OP_SHL, OP_SHR, OP_LESS, OP_LESS_EQUAL,
OP_GREATER, OP_GREATER_EQUAL, OP_EQUAL, OP_PRINT, OP_POP, OP_DEFINE, OP_GET,OP_DEF_STRING
OP_GREATER, OP_GREATER_EQUAL, OP_EQUAL, OP_PRINT, OP_POP, OP_DEFINE, OP_GET,OP_DEF_STRING, OP_DEF_BOOL
};
pub struct Chunk {
@ -75,6 +75,7 @@ impl Chunk {
OP_POP => self.simple_inst("POP", offset),
OP_DEFINE => self.constant_inst("DEF", offset),
OP_DEF_STRING => self.constant_inst("DEFSTR", offset),
OP_DEF_BOOL => self.constant_inst("DEFBOOL", offset),
OP_GET => self.constant_inst("GET", offset),
_ => {
println!("Unknown instruction {}", instruction);
@ -90,12 +91,12 @@ impl Chunk {
fn constant_inst(&self, name: &str, offset: usize) -> usize {
let constant = self.code[offset + 1];
print!("{} {} ", name, constant);
print!("{} {}:", name, constant);
self.print_value(&self.constants[constant as usize]);
offset + 2
}
fn print_value(&self, value: &Value) {
println!("{:?}", value);
println!("{}", value);
}
}

66
src/compiler.rs
View file

@ -4,10 +4,10 @@ use crate::tokens::{Token, TokenType};
use crate::value::Value;
use crate::vm::{
OP_ADD, OP_BITAND, OP_BITOR, OP_BITXOR, OP_CONSTANT, OP_DEF_BOOL, OP_DEF_CHAR, OP_DEF_DATE,
OP_DEF_I32, OP_DEF_I64, OP_DEF_LIST, OP_DEF_MAP, OP_DEF_OBJ, OP_DEF_STRING, OP_DEFINE,
OP_DIVIDE, OP_EQUAL, OP_FALSE, OP_GET, OP_GREATER, OP_GREATER_EQUAL, OP_LESS, OP_LESS_EQUAL,
OP_MULTIPLY, OP_NEGATE, OP_NOT, OP_POP, OP_PRINT, OP_RETURN, OP_SHL, OP_SHR, OP_SUBTRACT,
OP_TRUE,
OP_DEF_F64, OP_DEF_I32, OP_DEF_I64, OP_DEF_LIST, OP_DEF_MAP, OP_DEF_STRUCT, OP_DEF_STRING,
OP_DEFINE, OP_DIVIDE, OP_EQUAL, OP_FALSE, OP_GET, OP_GREATER, OP_GREATER_EQUAL, OP_LESS,
OP_LESS_EQUAL, OP_MULTIPLY, OP_NEGATE, OP_NOT, OP_POP, OP_PRINT, OP_RETURN, OP_SHL, OP_SHR,
OP_SUBTRACT, OP_TRUE,
};
use anyhow::anyhow;
use std::collections::HashMap;
@ -70,7 +70,7 @@ impl<'a> Compiler<'a> {
fn let_declaration(&mut self) -> anyhow::Result<()> {
let index = self.parse_variable("Expect variable name")?;
let mut var_type = None;
let mut declared_type = None;
if self.check(TokenType::Colon) {
self.consume(TokenType::Colon, "must not happen")?;
match self.current_token.token_type {
@ -83,15 +83,16 @@ impl<'a> Compiler<'a> {
| TokenType::Char
| TokenType::Bool
| TokenType::ListType
| TokenType::MapType => var_type = Some(self.current_token.token_type),
| TokenType::MapType => declared_type = Some(self.current_token.token_type),
_ => return Err(anyhow!("Invalid type {:?}", self.current_token.token_type)),
}
self.advance()?;
}
if self.match_token(TokenType::Equal) {
self.expression(var_type)?;
self.expression(declared_type)?;
let derived_type = Some(&self.previous_token.token_type);
self.consume(TokenType::Eol, "Expect end of line")?;
self.define_variable(var_type, index)?;
self.define_variable(declared_type, derived_type, index)?;
} else {
return Err(anyhow!(
"You cannot declare a variable without initializing it."
@ -111,7 +112,12 @@ impl<'a> Compiler<'a> {
Ok(index)
}
fn define_variable(&mut self, var_type: Option<TokenType>, index: usize) -> anyhow::Result<()> {
fn define_variable(
&mut self,
var_type: Option<TokenType>,
derived_type: Option<&TokenType>,
index: usize,
) -> anyhow::Result<()> {
let def_op = match var_type {
Some(TokenType::I32) => OP_DEF_I32,
Some(TokenType::I64) => OP_DEF_I64,
@ -123,8 +129,17 @@ impl<'a> Compiler<'a> {
Some(TokenType::Bool) => OP_DEF_BOOL,
Some(TokenType::ListType) => OP_DEF_LIST,
Some(TokenType::MapType) => OP_DEF_MAP,
Some(TokenType::Object) => OP_DEF_OBJ,
Some(TokenType::Object) => OP_DEF_STRUCT,
_ => match derived_type {
Some(TokenType::Text) => OP_DEF_STRING,
Some(TokenType::Bool) => OP_DEF_BOOL,
Some(TokenType::Char) => OP_DEF_CHAR,
Some(TokenType::F64) => OP_DEF_F64,
Some(TokenType::I64) => OP_DEF_I64,
Some(TokenType::ListType) => OP_DEF_LIST,
Some(TokenType::MapType) => OP_DEF_MAP,
_ => OP_DEFINE,
},
};
self.emit_bytes(def_op, index as u16);
@ -275,7 +290,14 @@ fn number(s: &mut Compiler, expected_type: Option<TokenType>) -> anyhow::Result<
TokenType::F32 => Value::U32(number.parse()?),
TokenType::F64 => Value::U64(number.parse()?),
_ => {return Err(anyhow!("Invalid type: expected {} value, got {}({})", expected_type, &s.previous_token.token_type, number));}
_ => {
return Err(anyhow!(
"Invalid type: expected {} value, got {}({})",
expected_type,
&s.previous_token.token_type,
number
));
}
}
} else {
if let TokenType::Number = s.previous_token.token_type {
@ -285,7 +307,7 @@ fn number(s: &mut Compiler, expected_type: Option<TokenType>) -> anyhow::Result<
Value::I64(number.parse()?)
}
} else {
return Err(anyhow!("I did not think this would happen"))
return Err(anyhow!("I did not think this would happen"));
}
};
s.emit_constant(value);
@ -293,21 +315,31 @@ fn number(s: &mut Compiler, expected_type: Option<TokenType>) -> anyhow::Result<
}
fn literal(s: &mut Compiler, expected_type: Option<TokenType>) -> anyhow::Result<()> {
let actual_type = &s.previous_token.token_type;
if let Some(expected_type) = expected_type {
if discriminant(&expected_type) != discriminant(&s.previous_token.token_type) {
match (actual_type, expected_type) {
(TokenType::False, TokenType::Bool) => s.emit_constant(Value::Bool(false)),
(TokenType::True, TokenType::Bool) => s.emit_constant(Value::Bool(true)),
(TokenType::Text, TokenType::String) => {
s.emit_constant(Value::String(s.previous_token.lexeme.clone()))
}
_ => {
return Err(anyhow!(
"Cannot assign {:?} to {:?}",
s.previous_token.token_type,
expected_type
"Invalid type: expected {} value, got {}({})",
expected_type,
&s.previous_token.token_type,
s.previous_token.lexeme
));
}
}
match s.previous_token.token_type {
} else {
match actual_type {
TokenType::False => s.emit_constant(Value::Bool(false)),
TokenType::True => s.emit_constant(Value::Bool(true)),
TokenType::Text => s.emit_constant(Value::String(s.previous_token.lexeme.clone())),
_ => {}
}
}
Ok(())
}

2
src/main.rs
View file

@ -2,7 +2,7 @@ fn main() -> anyhow::Result<()> {
tracing_subscriber::fmt::init();
let chunk = crudlang::compiler::compile(
r#"let a:bool = 42"#,
r#"let a: string = "koe""#,
);
match chunk {
Err(e) => {

33
src/value.rs
View file

@ -6,6 +6,35 @@ use std::fmt::{write, Display, Formatter};
use std::hash::{Hash, Hasher};
use std::ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Neg, Not, Shl, Shr, Sub};
#[derive(Debug, Clone)]
pub struct StructDefinition {
fields: Vec<String>
}
#[derive(Debug, Clone)]
pub struct Instance {
definition: StructDefinition,
fields: Vec<Value>
}
impl Instance {
pub fn new(definition: StructDefinition) -> Self {
Self {
definition,
fields: Vec::new()
}
}
}
impl Display for Instance {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
for (i, field) in self.definition.fields.iter().enumerate() {
write!(f, "{}: {}", field, self.fields[i])?;
}
Ok(())
}
}
#[derive(Debug, Clone)]
pub enum Value {
U32(u32),
@ -19,9 +48,9 @@ pub enum Value {
Bool(bool),
Date(DateTime<Utc>),
Enum,
Struct,
List(Vec<Value>),
Map(HashMap<Value, Value>),
Struct(Instance),
Error(String),
Void
}
@ -111,7 +140,7 @@ impl Display for Value {
&Value::Char(v) => write!(f, "{}", v),
&Value::Date(v) => write!(f, "{}", v),
&Value::Enum => write!(f, "enum"),
&Value::Struct => write!(f, "struct"),
&Value::Struct(v) => write!(f, "{}", v),
&Value::List(v) => write!(f, "{:?}", v),
&Value::Map(v) => write!(f, "map"),
&Value::Error(v) => write!(f, "{}", v),

129
src/vm.rs
View file

@ -84,8 +84,118 @@ impl Vm {
OP_DEF_I32 => {
let name = self.read_constant();
let value = self.pop();
if let Value::I32(v) = value {
if let Value::I32(_) = value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected i32, got {:?}", value));
}
}
OP_DEF_I64 => {
let name = self.read_constant();
let value = self.pop();
if let Value::I64(_) = value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected i64, got {:?}", value));
}
}
OP_DEF_U32 => {
let name = self.read_constant();
let value = self.pop();
if let Value::U32(_) = value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected u32, got {:?}", value));
}
}
OP_DEF_U64 => {
let name = self.read_constant();
let value = self.pop();
if let Value::U64(_) = value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected u64, got {:?}", value));
}
}
OP_DEF_F32 => {
let name = self.read_constant();
let value = self.pop();
if let Value::F32(_) = value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected f32, got {:?}", value));
}
}
OP_DEF_F64 => {
let name = self.read_constant();
let value = self.pop();
if let Value::F64(_) = value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected f64, got {:?}", value));
}
}
OP_DEF_STRING => {
let name = self.read_constant();
let value = self.pop();
if let Value::String(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected string, got {:?}", value));
}
}
OP_DEF_CHAR => {
let name = self.read_constant();
let value = self.pop();
if let Value::Char(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected char, got {:?}", value));
}
}
OP_DEF_BOOL => {
let name = self.read_constant();
let value = self.pop();
if let Value::Bool(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected bool, got {:?}", value));
}
}
OP_DEF_DATE => {
let name = self.read_constant();
let value = self.pop();
if let Value::Date(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected date, got {:?}", value));
}
}
OP_DEF_LIST => {
let name = self.read_constant();
let value = self.pop();
if let Value::List(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected list, got {:?}", value));
}
}
OP_DEF_MAP => {
let name = self.read_constant();
let value = self.pop();
if let Value::Map(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected map, got {:?}", value));
}
}
OP_DEF_STRUCT => {
let name = self.read_constant();
let value = self.pop();
if let Value::Struct(_) = &value {
self.local_vars.insert(name, value);
} else {
return Err(anyhow!("Expected object, got {:?}", value));
}
}
OP_GET => {
@ -170,10 +280,13 @@ pub const OP_GET: u16 = 27;
pub const OP_DEF_I32: u16 = 28;
pub const OP_DEF_I64: u16 = 29;
pub const OP_DEF_U32: u16 = 30;
pub const OP_DEF_DATE: u16 = 31;
pub const OP_DEF_STRING: u16 = 32;
pub const OP_DEF_CHAR: u16 = 33;
pub const OP_DEF_BOOL: u16 = 34;
pub const OP_DEF_LIST: u16 = 35;
pub const OP_DEF_MAP: u16 = 36;
pub const OP_DEF_OBJ: u16 = 37;
pub const OP_DEF_U64: u16 = 31;
pub const OP_DEF_DATE: u16 = 32;
pub const OP_DEF_STRING: u16 = 33;
pub const OP_DEF_CHAR: u16 = 34;
pub const OP_DEF_BOOL: u16 = 35;
pub const OP_DEF_LIST: u16 = 36;
pub const OP_DEF_MAP: u16 = 37;
pub const OP_DEF_STRUCT: u16 = 38;
pub const OP_DEF_F32: u16 = 39;
pub const OP_DEF_F64: u16 = 40;