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feat: if cond, loop cycle

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This commit is contained in:
Artemy 2022-08-03 22:59:54 +03:00
parent 4a9332e34a
commit 86e46e9695
2 changed files with 145 additions and 6 deletions
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117
src/interpreter.rs
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@ -102,6 +102,22 @@ impl Interpreter {
self.error("Unsupported data type for the let argument");
}
},
"if" => match value {
Value::Object(value) => {
return self.if_node(value);
}
_ => {
self.error("Unsupported data type for the if argument");
}
},
"loop" => match value {
Value::Array(value) => {
return self.loop_cycle(value);
}
_ => {
self.error("Unsupported data type for the loop cycle argument");
}
},
name => {
self.unk_token(&name);
}
@ -115,12 +131,14 @@ impl Interpreter {
"ErrExit" => {
self.err_exit();
}
"break" => return Value::String("break".to_string()),
"continue" => return Value::String("continue".to_string()),
value => {
self.print(&vec![Value::String(value.to_string())], false);
self.print(&vec![Value::String(value.to_string())], true);
}
},
Value::Array(command) => {
self.print(command, false);
self.print(command, true);
}
_ => {
self.error("Unsupported data type for the command");
@ -129,6 +147,96 @@ impl Interpreter {
return Value::Null;
}
fn if_node(&mut self, value: &Map<String, Value>) -> Value {
let condition = self.eval_node(&value["condition"]);
let nodes = &value.get("body");
let else_nodes = &value.get("else");
match nodes {
Some(nodes) => match nodes {
Value::Array(nodes) => match else_nodes {
Some(else_nodes) => match else_nodes {
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 Value::Null;
} 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 Value::Null;
};
}
_ => {
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 Value::Null;
}
return Value::Null;
}
},
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 Value::Null;
}
return Value::Null;
}
},
_ => return Value::Null,
},
None => {
self.error("if must have a body");
panic!()
}
}
}
fn loop_cycle(&mut self, value: &Vec<Value>) -> Value {
loop {
let name = self.run_nodes(value);
if name == "break" {
break Value::Null;
}
if name == "continue" {
continue;
}
}
}
fn run_nodes(&mut self, arr: &Vec<Value>) -> String {
for command in arr {
let to_do = self.eval_node(command);
match to_do {
Value::String(name) => return name,
_ => {}
}
}
"end".to_string()
}
fn define(&mut self, vars: &Map<String, Value>) -> Value {
for (name, value) in vars {
match value {
@ -358,11 +466,8 @@ impl Interpreter {
fn print(&mut self, args: &Vec<Value>, ln: bool) {
for arg in args {
self.print_one(arg);
if ln == true {
println!();
}
}
if ln == false {
if ln == true {
println!();
}
}