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feat: beta functions

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This commit is contained in:
Artemy 2022-08-15 16:12:58 +03:00
parent ef212320da
commit 1a693e38dd
4 changed files with 238 additions and 93 deletions
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19
examples/example.json5
View file

@ -275,6 +275,25 @@
"After scope",
['isExist("scoped"): ', { isExist: "scoped" }],
"Creating function `sum`",
{
fn: {
name: "sum",
args: ["first", "second"],
body: [
{
return: {
calc: [{ var: "sum.first" }, "+", { var: "sum.second" }],
},
},
],
},
},
"Run function `sum`",
["fn sum(first, second){ return first+second}; sum(2,2) = ", { sum: [2, 2] }],
"\nInput a var",
{
let: {

203
src/interpreter.rs
View file

@ -113,7 +113,7 @@ impl Interpreter {
"var" => match value {
Value::String(value) => {
return self.get_var(value);
return self.get_var(value).body.clone();
}
_ => {
self.error("Unsupported data type for the `var` argument, must be a string");
@ -167,6 +167,14 @@ impl Interpreter {
self.error("Unsupported data type for the `if` argument, must be an object");
}
},
"fn" => match value {
Value::Object(value) => {
self.define_fn(value);
}
_ => {
self.error("Unsupported data type for the `fn` argument, must be an object");
}
},
"loop" => match value {
Value::Array(value) => {
return self.loop_cycle(value);
@ -206,9 +214,16 @@ impl Interpreter {
self.error("Unsupported data type for the `obj` argument, must be an array");
}
},
name => {
"return" => return json!({ "return": value }),
name => match value {
Value::Array(value) => {
return self.run_fn(name.to_string(), value);
}
_ => {
self.unk_token(&name);
}
},
}
}
}
@ -231,7 +246,8 @@ impl Interpreter {
Value::Array(command) => {
self.print(command, true);
}
_ => {
val => {
println!("{}", serde_json::to_string_pretty(val).unwrap());
self.error("Unsupported data type for the command");
}
}
@ -280,6 +296,86 @@ impl Interpreter {
Value::String(input.trim_end().to_string())
}
fn run_fn(&mut self, name: String, args: &Vec<Value>) -> Value {
let function = self.get_var(&name);
match function.var_type {
VarTypes::Variable => {
self.error(&format!("`{}` not a function", name));
}
VarTypes::Function => {
let function = function.body.clone();
let real_len = args.len();
let func_args = function.get("args").unwrap().as_array().unwrap();
if real_len == func_args.len() {
self.enter_the_scope();
for i in 0..real_len {
let argname = &func_args[i];
match argname {
Value::String(argname) => {
self.create_var(&format!("{}.{}", name, argname), &args[i], false);
}
_ => self.error("Argument name must be a string"),
}
}
let name = self.run_nodes(function.get("body").unwrap().as_array().unwrap());
match name {
Value::Object(name) => {
let result = self.eval_node(&name.get("return").unwrap());
self.exit_from_scope();
return result;
}
_ => return Value::Null,
}
} else {
self.error(&format!(
"`{}` must have {} arguments, but {} is specified",
name,
func_args.len(),
real_len
));
}
}
}
self.exit_from_scope();
Value::Null
}
fn define_fn(&mut self, value: &Map<String, Value>) {
let name = &value.get("name");
let body = &value.get("body");
let args = &value.get("args");
match name {
Some(name) => match name {
Value::String(name) => match body {
Some(body) => match body {
Value::Array(body) => match args {
Some(args) => match args {
Value::Array(args) => {
// let args: Vec<String> = args.iter().map(|val| format!("{}.{}", name, val)).collect();
self.vars.insert(
name.clone(),
Var {
scope: self.scope,
body: json!({"args":args, "body":body}),
var_type: VarTypes::Function,
},
);
}
_ => self.error("Arguments must be an array of strings"),
},
None => self
.error("Each function must have an array of arguments or an empty array instead of them"),
},
_ => self.error("Body must be an array of commands"),
},
None => self.error("Each function must have a body"),
},
_ => self.error("Name must be a string"),
},
None => self.error("Function must have a name"),
}
}
fn if_node(&mut self, value: &Map<String, Value>) -> Value {
let condition = self.eval_node(&value["condition"]);
let nodes = &value.get("body");
@ -292,43 +388,23 @@ impl Interpreter {
Value::Array(else_nodes) => {
if condition == true {
let name = self.run_nodes(nodes);
if name == "break" {
return Value::String("break".to_string());
}
if name == "continue" {
return Value::String("continue".to_string());
}
return name;
} else {
let name = self.run_nodes(else_nodes);
if name == "break" {
return Value::String("break".to_string());
}
if name == "continue" {
return Value::String("continue".to_string());
}
return name;
};
}
_ => {
if condition == true {
let name = self.run_nodes(nodes);
if name == "break" {
return Value::String("break".to_string());
}
if name == "continue" {
return Value::String("continue".to_string());
}
return name;
}
}
},
None => {
if condition == true {
let name = self.run_nodes(nodes);
if name == "break" {
return Value::String("break".to_string());
}
if name == "continue" {
return Value::String("continue".to_string());
}
return name;
}
}
},
@ -344,28 +420,54 @@ impl Interpreter {
fn loop_cycle(&mut self, value: &Vec<Value>) -> Value {
loop {
let name = self.run_nodes(value);
match name {
Value::String(name) => {
if name == "break" {
break Value::Null;
}
if name == "continue" {
} else if name == "continue" {
continue;
}
}
Value::Object(_) => {
return name;
}
_ => {}
}
}
}
fn run_nodes(&mut self, arr: &Vec<Value>) -> String {
self.scope += 1;
self.scopes.push(Vec::new());
fn run_nodes(&mut self, arr: &Vec<Value>) -> Value {
self.enter_the_scope();
for command in arr {
let to_do = self.eval_node(command);
match to_do {
Value::String(name) => return name,
Value::String(name) => {
if name == "break" || name == "continue" {
return Value::String(name);
}
}
Value::Object(name) => {
let check = name.get("return");
match check {
Some(_) => return Value::Object(name),
None => {}
}
}
_ => {}
}
}
self.exit_from_scope();
Value::String("end".to_string())
}
fn enter_the_scope(&mut self) {
self.scope += 1;
self.scopes.push(Vec::new());
}
fn exit_from_scope(&mut self) {
self.delete_last_scope();
self.scope -= 1;
"end".to_string()
}
fn delete_last_scope(&mut self) {
@ -378,6 +480,10 @@ impl Interpreter {
fn define(&mut self, vars: &Map<String, Value>) {
for (name, value) in vars {
self.create_var(name, value, true);
}
}
fn create_var(&mut self, name: &String, value: &Value, panic: bool) {
if !self.var_exists(&name) {
match value {
Value::Object(_) => {
@ -387,6 +493,7 @@ impl Interpreter {
Var {
scope: self.scope,
body: value,
var_type: VarTypes::Variable,
},
);
self.scopes[self.scope].push(name.clone())
@ -397,17 +504,20 @@ impl Interpreter {
Var {
scope: self.scope,
body: value.clone(),
var_type: VarTypes::Variable,
},
);
self.scopes[self.scope].push(name.clone())
}
}
} else {
if panic {
self.error(&format!("The variable {} already exist, use assign", name));
} else {
self.assign_var(name, value);
}
}
}
fn delete(&mut self, var_name: &String, panic: bool) {
if self.var_exists(var_name) {
self.vars.remove(var_name);
@ -421,15 +531,15 @@ impl Interpreter {
}
}
fn get_var(&mut self, var_name: &String) -> Value {
fn get_var(&mut self, var_name: &String) -> &Var {
let var = self.vars.get(var_name);
match var {
Some(var) => return var.body.clone(),
Some(var) => return var,
None => {
self.error(&format!("The variable {} does not exist", var_name));
panic!();
}
}
Value::Null
}
fn get_var_scope(&mut self, var_name: &String) -> usize {
@ -445,12 +555,22 @@ impl Interpreter {
fn assign(&mut self, vars: &Map<String, Value>) {
for (name, value) in vars {
self.assign_var(name, value);
}
}
fn assign_var(&mut self, name: &String, value: &Value) {
let scope = self.get_var_scope(name);
match value {
Value::Object(_) => {
let value = self.eval_node(value);
self.vars
.insert(name.to_string(), Var { scope, body: value });
self.vars.insert(
name.to_string(),
Var {
scope,
body: value,
var_type: VarTypes::Variable,
},
);
}
_ => {
self.vars.insert(
@ -458,13 +578,12 @@ impl Interpreter {
Var {
scope,
body: value.clone(),
var_type: VarTypes::Variable,
},
);
}
}
}
}
fn var_exists(&self, name: &String) -> bool {
match self.vars.get(name) {
Some(_) => true,

18
src/main.rs
View file

@ -15,15 +15,15 @@ mod interpreter;
use interpreter::Interpreter;
fn main() {
std::panic::set_hook(Box::new(|info| {
eprint!(
"{msg}",
msg = match info.payload().downcast_ref::<String>() {
None => "Program panicked without a message!",
Some(x) => x,
}
);
}));
// std::panic::set_hook(Box::new(|info| {
// eprint!(
// "{msg}",
// msg = match info.payload().downcast_ref::<String>() {
// None => "Program panicked without a message!",
// Some(x) => x,
// }
// );
// }));
let start = Instant::now();
let args = Args::parse();

7
src/types.rs
View file

@ -3,5 +3,12 @@ use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct Var {
pub scope: usize,
pub var_type: VarTypes,
pub body: serde_json::Value,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
pub enum VarTypes {
Variable,
Function,
}