mirror of
https://github.com/artegoser/ONLang
synced 2024-12-22 17:13:46 +03:00
feat: named scopes, support of recursion
Initially named scopes were made for imports, but the side effect was to support recursion in functions
This commit is contained in:
parent
16aad56fce
commit
6dbc9f7ba4
2 changed files with 82 additions and 26 deletions
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@ -14,6 +14,7 @@ pub struct Interpreter {
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pos: usize,
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scope: usize,
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scopes: Vec<Vec<String>>,
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named_scopes: Vec<String>,
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}
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impl Interpreter {
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@ -54,6 +55,7 @@ impl Interpreter {
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pos: 1,
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scope: 0,
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scopes: Vec::new(),
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named_scopes: Vec::new(),
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}
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}
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"conla" => {
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@ -72,6 +74,7 @@ impl Interpreter {
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pos: 1,
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scope: 0,
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scopes: Vec::new(),
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named_scopes: Vec::new(),
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}
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}
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_ => {
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@ -94,6 +97,7 @@ impl Interpreter {
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pos: 1,
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scope: 0,
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scopes: Vec::new(),
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named_scopes: Vec::new(),
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}
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}
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}
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@ -436,13 +440,23 @@ impl Interpreter {
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VarTypes::Function => {
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let function = function.body.clone();
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let real_len = args.len();
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let func_args = function.get("args").unwrap().as_array().unwrap();
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let func_args = function.get("args").unwrap().as_array().unwrap().clone();
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if real_len == func_args.len() {
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let args: Vec<Value> = args
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.into_iter()
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.map(|arg| match arg {
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Value::Object(_) => self.eval_node(arg),
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_ => arg.clone(),
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})
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.collect();
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self.enter_the_named_scope(name.clone());
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for i in 0..real_len {
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let argname = &func_args[i];
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match argname {
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Value::String(argname) => {
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self.create_var(&format!("{}.{}", name, argname), &args[i], false);
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self.create_var(argname, &args[i], true);
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}
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_ => self.error("Argument name must be a string"),
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}
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@ -451,20 +465,23 @@ impl Interpreter {
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let name = self.run_nodes(function.get("body").unwrap().as_array().unwrap());
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match name {
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Value::Object(name) => {
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self.exit_from_named_scope();
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return name.get("return").unwrap().clone();
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}
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_ => return Value::Null,
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_ => {
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self.exit_from_named_scope();
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return Value::Null;
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}
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}
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} else {
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self.error(&format!(
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"`{}` must have {} arguments, but {} is specified",
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name,
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"`{name}` must have {} arguments, but {real_len} is specified",
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func_args.len(),
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real_len
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));
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}
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}
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}
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self.exit_from_named_scope();
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Value::Null
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}
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fn define_fn(&mut self, value: &Map<String, Value>) {
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@ -479,15 +496,19 @@ impl Interpreter {
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Value::Array(body) => match args {
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Some(args) => match args {
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Value::Array(args) => {
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// let args: Vec<String> = args.iter().map(|val| format!("{}.{}", name, val)).collect();
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self.vars.insert(
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name.clone(),
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Var {
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scope: self.scope,
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body: json!({"args":args, "body":body}),
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var_type: VarTypes::Function,
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},
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);
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let name = self.get_name_scoped_name(name, true);
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if !self.var_exists(&name) {
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self.vars.insert(
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name.clone(),
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Var {
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scope: self.scope,
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body: json!({"name":name,"args":args, "body":body}),
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var_type: VarTypes::Function,
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},
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);
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} else {
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self.error(&format!("The variable `{}` already exist, rename function", name));
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}
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}
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_ => self.error("Arguments must be an array of strings"),
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},
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@ -608,6 +629,16 @@ impl Interpreter {
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self.scopes.push(Vec::new());
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}
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fn enter_the_named_scope(&mut self, name: String) {
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self.enter_the_scope();
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self.named_scopes.push(name);
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}
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fn exit_from_named_scope(&mut self) {
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self.exit_from_scope();
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self.named_scopes.pop();
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}
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fn exit_from_scope(&mut self) {
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self.delete_last_scope();
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self.scope -= 1;
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@ -626,7 +657,27 @@ impl Interpreter {
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self.create_var(name, value, true);
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}
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}
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fn get_name_scoped_name(&mut self, name: &String, to_create: bool) -> String {
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let n_len = self.named_scopes.len();
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if n_len > 0 {
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let new_name = format!("{}.{name}", self.named_scopes[n_len - 1]);
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if to_create {
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new_name
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} else {
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if let Some(_) = self.vars.get(&new_name) {
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new_name
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} else {
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name.clone()
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}
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}
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} else {
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name.clone()
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}
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}
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fn create_var(&mut self, name: &String, value: &Value, panic: bool) {
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let name = self.get_name_scoped_name(name, true);
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if !self.var_exists(&name) {
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match value {
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Value::Object(_) => {
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@ -639,7 +690,7 @@ impl Interpreter {
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var_type: VarTypes::Variable,
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},
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);
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self.scopes[self.scope].push(name.clone())
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self.scopes[self.scope].push(name)
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}
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_ => {
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self.vars.insert(
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@ -657,13 +708,14 @@ impl Interpreter {
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if panic {
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self.error(&format!("The variable {} already exist, use assign", name));
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} else {
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self.assign_var(name, value);
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self.assign_var(&name, value);
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}
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}
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}
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fn delete(&mut self, var_name: &String, panic: bool) {
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if self.var_exists(var_name) {
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self.vars.remove(var_name);
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let var_name = self.get_name_scoped_name(var_name, false);
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if self.var_exists(&var_name) {
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self.vars.remove(&var_name);
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} else {
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if panic {
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self.error(&format!(
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@ -675,7 +727,8 @@ impl Interpreter {
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}
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fn get_var(&mut self, var_name: &String) -> &Var {
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let var = self.vars.get(var_name);
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let var_name = self.get_name_scoped_name(var_name, false);
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let var = self.vars.get(&var_name);
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match var {
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Some(var) => return var,
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None => {
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@ -698,11 +751,12 @@ impl Interpreter {
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fn assign(&mut self, vars: &Map<String, Value>) {
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for (name, value) in vars {
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self.assign_var(name, value);
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self.assign_var(&name, value);
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}
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}
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fn assign_var(&mut self, name: &String, value: &Value) {
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let scope = self.get_var_scope(name);
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let name = self.get_name_scoped_name(name, false);
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let scope = self.get_var_scope(&name);
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match value {
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Value::Object(_) => {
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let value = self.eval_node(value);
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@ -727,15 +781,17 @@ impl Interpreter {
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}
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}
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}
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fn var_exists(&self, name: &String) -> bool {
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match self.vars.get(name) {
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fn var_exists(&mut self, name: &String) -> bool {
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let name = self.get_name_scoped_name(name, true);
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match self.vars.get(&name) {
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Some(_) => true,
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None => false,
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}
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}
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fn variable_reference(&mut self, name: &String) -> Value {
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if self.var_exists(name) {
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let name = self.get_name_scoped_name(name, false);
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if self.var_exists(&name) {
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return json!({ "var": name });
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} else {
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self.error(&format!(
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@ -23,7 +23,7 @@ mod interpreter;
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use interpreter::Interpreter;
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fn main() {
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// #[cfg(not(debug_assertions))]
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#[cfg(not(debug_assertions))]
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std::panic::set_hook(Box::new(|info| {
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eprint!(
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"{}",
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