- fixed a bug with t.fits_in(rhs) regarding inner types

- added //...\n and /*...*/ comment syntax
- added tuple.n indexing, where n is an int <= the tuples length (this is checked before the script runs)

src/main.rs

@@ -6,8 +6,21 @@ pub(crate) mod parse;
 pub(crate) mod script;
 
 fn main() {
-    let str1: VType = VSingleType::String.into();
-    assert!(str1.fits_in(&VSingleType::String.into()).is_empty());
+    let val: VType = VSingleType::Tuple(vec![
+        VSingleType::Int.into(),
+        VSingleType::String.into(),
+        VSingleType::String.into(),
+    ])
+    .into();
+    let case: VType = VSingleType::Tuple(vec![
+        VType {
+            types: vec![VSingleType::Tuple(vec![]).into(), VSingleType::Int.into()],
+        },
+        VSingleType::String.into(),
+        VSingleType::String.into(),
+    ])
+    .into();
+    assert!(val.fits_in(&case).is_empty());
     let script = parse::parse::parse(&mut parse::file::File::new(
         std::fs::read_to_string("/tmp/script.txt").unwrap(),
     ))

src/parse/file.rs

@@ -25,6 +25,41 @@ impl Display for FilePosition {
 
 impl File {
     pub fn new(data: String) -> Self {
+        let mut chs = data.chars();
+        let mut data = String::with_capacity(data.len());
+        loop {
+            match chs.next() {
+                Some('/') => match chs.next() {
+                    Some('/') => loop {
+                        match chs.next() {
+                            Some('\n') | None => break,
+                            _ => (),
+                        }
+                    },
+                    Some('*') => loop {
+                        match chs.next() {
+                            Some('*') => {
+                                if let Some('/') = chs.next() {
+                                    break;
+                                }
+                            }
+                            None => break,
+                            _ => (),
+                        }
+                    },
+                    Some(ch) => {
+                        data.push('/');
+                        data.push(ch);
+                    }
+                    None => {
+                        data.push('/');
+                        break;
+                    }
+                },
+                Some(ch) => data.push(ch),
+                None => break,
+            }
+        }
         let chars = data.char_indices().collect();
         Self {
             data,

src/parse/parse.rs

@@ -271,12 +271,7 @@ fn parse_statement_adv(
                                     }
                                     cases.push((parse_type(file)?, parse_statement(file)?));
                                 }
-                                break SStatementEnum::Switch(
-                                    SStatementEnum::Variable(switch_on_what).into(),
-                                    cases,
-                                    force,
-                                )
-                                .into();
+                                break SStatementEnum::Switch(switch_on_what, cases, force).into();
                             }
                             "true" => {
                                 break SStatementEnum::Value(VDataEnum::Bool(true).to()).into()
@@ -332,6 +327,10 @@ fn parse_statement_adv(
                         let args = [out].into_iter().chain(args.into_iter()).collect();
                         SStatementEnum::FunctionCall(func, args).into()
                     }
+                    SStatementEnum::Value(vd) => match vd.data {
+                        VDataEnum::Int(i) => SStatementEnum::IndexFixed(out, i as _).into(),
+                        _ => todo!("fixed-indexing not available with this type."),
+                    },
                     other => {
                         todo!("Wrapping in this type isn't implemented (yet?). Type: {other:?}")
                     }

src/script/block.rs

@@ -66,8 +66,9 @@ pub enum SStatementEnum {
     If(SStatement, SStatement, Option<SStatement>),
     While(SStatement),
     For(String, SStatement, SStatement),
-    Switch(SStatement, Vec<(VType, SStatement)>, bool),
+    Switch(String, Vec<(VType, SStatement)>, bool),
     // Match(???),
+    IndexFixed(SStatement, usize),
 }
 impl Into<SStatement> for SStatementEnum {
     fn into(self) -> SStatement {
@@ -112,6 +113,7 @@ pub mod to_runnable {
         },
         InvalidTypeForWhileLoop(VType),
         CaseForceButTypeNotCovered(VType),
+        NotIndexableFixed(VType, usize),
     }
     impl Debug for ToRunnableError {
         fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -137,6 +139,7 @@ pub mod to_runnable {
                 }
                 Self::InvalidTypeForWhileLoop(v) => write!(f, "Invalid type: Expected bool or Tuples of length 0 or 1 as return types for the while loop, but found {v:?} instead."),
                 Self::CaseForceButTypeNotCovered(v) => write!(f, "Switch! statement, but not all types covered. Types to cover: {v}"),
+                Self::NotIndexableFixed(t, i) => write!(f, "Cannot use fixed-index {i} on type {t}."),
             }
         }
     }
@@ -376,26 +379,62 @@ pub mod to_runnable {
                 o
             }
             SStatementEnum::Switch(switch_on, cases, force) => {
-                let mut ncases = Vec::with_capacity(cases.len());
-                for case in cases {
-                    ncases.push((case.0.clone(), statement(&case.1, ginfo, linfo)?));
-                }
-                let switch_on = statement(switch_on, ginfo, linfo)?;
-                let switch_on_out = switch_on.out();
-                if *force {
-                    for val_type in switch_on_out.types.iter() {
-                        let val_type: VType = val_type.clone().into();
-                        'force: {
-                            for (case_type, _) in ncases.iter() {
-                                if val_type.fits_in(&case_type).is_empty() {
-                                    break 'force;
+                if let Some(switch_on_v) = linfo.vars.get(switch_on).cloned() {
+                    let mut ncases = Vec::with_capacity(cases.len());
+                    let og_type = linfo.vars.get(switch_on).unwrap().1.clone();
+                    for case in cases {
+                        linfo.vars.get_mut(switch_on).unwrap().1 = case.0.clone();
+                        ncases.push((case.0.clone(), statement(&case.1, ginfo, linfo)?));
+                    }
+                    linfo.vars.get_mut(switch_on).unwrap().1 = og_type;
+
+                    let switch_on_out = switch_on_v.1;
+                    if *force {
+                        for val_type in switch_on_out.types.iter() {
+                            let val_type: VType = val_type.clone().into();
+                            let mut linf2 = linfo.clone();
+                            linf2.vars.get_mut(switch_on).unwrap().1 = val_type.clone();
+                            'force: {
+                                for (case_type, _) in cases {
+                                    if val_type.fits_in(&case_type).is_empty() {
+                                        break 'force;
+                                    }
                                 }
+                                return Err(ToRunnableError::CaseForceButTypeNotCovered(val_type));
                             }
-                            return Err(ToRunnableError::CaseForceButTypeNotCovered(val_type));
                         }
                     }
+                    RStatementEnum::Switch(
+                        RStatementEnum::Variable(switch_on_v.0, switch_on_out).to(),
+                        ncases,
+                    )
+                } else {
+                    return Err(ToRunnableError::UseOfUndefinedVariable(switch_on.clone()));
+                }
+            }
+            SStatementEnum::IndexFixed(st, i) => {
+                let st = statement(st, ginfo, linfo)?;
+                let ok = 'ok: {
+                    let mut one = false;
+                    for t in st.out().types {
+                        one = true;
+                        // only if all types are indexable by i
+                        match t {
+                            VSingleType::Tuple(v) => {
+                                if v.len() <= *i {
+                                    break 'ok false;
+                                }
+                            }
+                            _ => break 'ok false,
+                        }
+                    }
+                    one
+                };
+                if ok {
+                    RStatementEnum::IndexFixed(st, *i)
+                } else {
+                    return Err(ToRunnableError::NotIndexableFixed(st.out(), *i));
                 }
-                RStatementEnum::Switch(switch_on, ncases)
             }
         }
         .to();
@@ -523,6 +562,7 @@ pub enum RStatementEnum {
     While(RStatement),
     For(usize, RStatement, RStatement),
     Switch(RStatement, Vec<(VType, RStatement)>),
+    IndexFixed(RStatement, usize),
 }
 impl RStatementEnum {
     pub fn run(&self, vars: &Vec<Am<VData>>) -> VData {
@@ -620,6 +660,7 @@ impl RStatementEnum {
                 }
                 out
             }
+            Self::IndexFixed(st, i) => st.run(vars).get(*i).unwrap(),
         }
     }
     pub fn out(&self) -> VType {
@@ -657,6 +698,7 @@ impl RStatementEnum {
                 }
                 out
             }
+            Self::IndexFixed(st, i) => st.out().get(*i).unwrap(),
         }
     }
     pub fn to(self) -> RStatement {
@@ -820,6 +862,7 @@ impl Display for SStatementEnum {
                 }
                 write!(f, "}}")
             }
+            SStatementEnum::IndexFixed(st, i) => write!(f, "{st}.{i}"),
         }
     }
 }

src/script/value.rs

@@ -34,6 +34,9 @@ impl VData {
             VDataEnum::Thread(_, o) => VSingleType::Thread(o.clone()),
         }
     }
+    pub fn get(&self, i: usize) -> Option<Self> {
+        self.data.get(i)
+    }
 }
 
 #[derive(Clone, Debug)]
@@ -118,6 +121,45 @@ impl VDataEnum {
     }
 }
 
+// get()
+impl VDataEnum {
+    pub fn get(&self, i: usize) -> Option<VData> {
+        match self {
+            Self::Bool(..)
+            | Self::Int(..)
+            | Self::Float(..)
+            | Self::Function(..)
+            | Self::Thread(..) => None,
+            Self::String(s) => match s.chars().nth(i) {
+                // Slow!
+                Some(ch) => Some(Self::String(format!("{ch}")).to()),
+                None => None,
+            },
+            Self::Tuple(v) | Self::List(_, v) => v.get(i).cloned(),
+        }
+    }
+}
+impl VSingleType {
+    // None => Cannot get, Some(t) => getting can return t or nothing
+    pub fn get(&self, i: usize) -> Option<VType> {
+        match self {
+            Self::Bool | Self::Int | Self::Float | Self::Function(..) | Self::Thread(..) => None,
+            Self::String => Some(VSingleType::String.into()),
+            Self::Tuple(t) => t.get(i).cloned(),
+            Self::List(t) => Some(t.clone()),
+        }
+    }
+}
+impl VType {
+    pub fn get(&self, i: usize) -> Option<VType> {
+        let mut out = VType { types: vec![] };
+        for t in &self.types {
+            out = out | t.get(i)?; // if we can't use *get* on one type, we can't use it at all.
+        }
+        Some(out)
+    }
+}
+
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct VType {
     pub types: Vec<VSingleType>,
@@ -127,7 +169,8 @@ impl VType {
     pub fn fits_in(&self, rhs: &Self) -> Vec<VSingleType> {
         let mut no = vec![];
         for t in &self.types {
-            if !rhs.types.contains(t) {
+            // if t doesnt fit in any of rhs's types
+            if !rhs.types.iter().any(|r| t.fits_in(r)) {
                 no.push(t.clone())
             }
         }
@@ -187,6 +230,34 @@ impl VSingleType {
             _ => vec![],
         }
     }
+    pub fn fits_in(&self, rhs: &Self) -> bool {
+        match (self, rhs) {
+            (Self::Bool, Self::Bool)
+            | (Self::Int, Self::Int)
+            | (Self::Float, Self::Float)
+            | (Self::String, Self::String) => true,
+            (Self::Bool | Self::Int | Self::Float | Self::String, _) => false,
+            (Self::Tuple(a), Self::Tuple(b)) => {
+                if a.len() == b.len() {
+                    a.iter().zip(b.iter()).all(|(a, b)| a.fits_in(b).is_empty())
+                } else {
+                    false
+                }
+            }
+            (Self::Tuple(_), _) => false,
+            (Self::List(a), Self::List(b)) => a.fits_in(b).is_empty(),
+            (Self::List(_), _) => false,
+            (Self::Function(ai, ao), Self::Function(bi, bo)) => {
+                ai.iter()
+                    .zip(bi.iter())
+                    .all(|(a, b)| a.fits_in(b).is_empty())
+                    && ao.fits_in(bo).is_empty()
+            }
+            (Self::Function(..), _) => false,
+            (Self::Thread(a), Self::Thread(b)) => a.fits_in(b).is_empty(),
+            (Self::Thread(..), _) => false,
+        }
+    }
 }
 
 impl Into<VType> for VSingleType {