Merge pull request #24 from dbidwell94/documentation

QOL

Changelog.md

@@ -1,5 +1,22 @@
 # Changelog
 
+[0.2.2]
+
+- Fixed some formatting issues when converting Markdown to Text Mesh Pro for
+  Stationpedia
+- Added support for ternary expressions
+  - `let i = someValue ? 4 : 5;`
+  - `i = someValue ? 4 : 5;`
+  - This greedily evaluates both sides, so side effects like calling functions
+    is not recommended i.e.
+    - `i = someValue : doSomething() : doSomethingElse();`
+    - Both sides will be evaluated before calling the `select` instruction
+
+[0.2.1]
+
+- Added support for `loadSlot` and `setSlot`
+- Fixed bug where syscalls like `max(1, 2)` were not allowed in assignment expressions
+
 [0.2.0]
 
 - Completely re-wrote the tokenizer to use `logos`

ModData/About/About.xml

@@ -2,7 +2,7 @@
 <ModMetadata xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <Name>Slang</Name>
   <Author>JoeDiertay</Author>
-  <Version>0.2.0</Version>
+  <Version>0.2.2</Version>
   <Description>
 [h1]Slang: High-Level Programming for Stationeers[/h1]
 

csharp_mod/Patches.cs

@@ -12,6 +12,7 @@ public static class SlangPatches
 {
     private static ProgrammableChipMotherboard? _currentlyEditingMotherboard;
     private static AsciiString? _motherboardCachedCode;
+    private static Guid? _currentlyEditingGuid;
 
     [HarmonyPatch(
         typeof(ProgrammableChipMotherboard),
@@ -32,11 +33,13 @@ public static class SlangPatches
             return;
         }
 
-        var thisRef = Guid.NewGuid();
+        var thisRef = _currentlyEditingGuid ?? Guid.NewGuid();
 
         // Ensure we cache this compiled code for later retreival.
         GlobalCode.SetSource(thisRef, result);
 
+        _currentlyEditingGuid = null;
+
         // Append REF to the bottom
         compiled += $"\n{GlobalCode.SLANG_REF}{thisRef}";
         result = compiled;
@@ -77,6 +80,7 @@ public static class SlangPatches
             return;
         }
 
+        _currentlyEditingGuid = sourceRef;
         var slangSource = GlobalCode.GetSource(sourceRef);
 
         if (string.IsNullOrEmpty(slangSource))
@@ -223,6 +227,7 @@ public static class SlangPatches
 
         _currentlyEditingMotherboard = null;
         _motherboardCachedCode = null;
+        _currentlyEditingGuid = null;
     }
 
     [HarmonyPatch(typeof(Stationpedia), nameof(Stationpedia.Regenerate))]

csharp_mod/TmpFormatter.cs

@@ -26,12 +26,18 @@ public static class TextMeshProFormatter
             RegexOptions.Singleline
         );
 
-        // 3. Handle Headers (## Header)
-        // Convert ## Header to large bold text
         text = Regex.Replace(
             text,
-            @"^##(\s+)?(.+)$",
-            "<size=120%><b>$1</b></size>",
+            @"^\s*##\s+(.+)$",
+            "<size=110%><color=#ffffff><b>$1</b></color></size>",
+            RegexOptions.Multiline
+        );
+
+        // 3. Handle # Headers SECOND (General)
+        text = Regex.Replace(
+            text,
+            @"^\s*#\s+(.+)$",
+            "<size=120%><color=#ffffff><b>$1</b></color></size>",
             RegexOptions.Multiline
         );
 

csharp_mod/stationeersSlang.csproj

@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <AssemblyName>StationeersSlang</AssemblyName>
     <Description>Slang Compiler Bridge</Description>
-    <Version>0.2.0</Version>
+    <Version>0.2.2</Version>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>latest</LangVersion>
   </PropertyGroup>

rust_compiler/Cargo.lock

@@ -909,7 +909,7 @@ checksum = "e3a9fe34e3e7a50316060351f37187a3f546bce95496156754b601a5fa71b76e"
 
 [[package]]
 name = "slang"
-version = "0.2.0"
+version = "0.2.2"
 dependencies = [
  "anyhow",
  "clap",

rust_compiler/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "slang"
-version = "0.2.0"
+version = "0.2.2"
 edition = "2021"
 
 [workspace]

rust_compiler/libs/compiler/src/test/binary_expression.rs

@@ -1,9 +1,10 @@
 use crate::compile;
+use anyhow::Result;
 use indoc::indoc;
 use pretty_assertions::assert_eq;
 
 #[test]
-fn simple_binary_expression() -> anyhow::Result<()> {
+fn simple_binary_expression() -> Result<()> {
     let compiled = compile! {
         debug
         "
@@ -26,7 +27,7 @@ fn simple_binary_expression() -> anyhow::Result<()> {
 }
 
 #[test]
-fn nested_binary_expressions() -> anyhow::Result<()> {
+fn nested_binary_expressions() -> Result<()> {
     let compiled = compile! {
         debug
         "
@@ -71,7 +72,7 @@ fn nested_binary_expressions() -> anyhow::Result<()> {
 }
 
 #[test]
-fn stress_test_constant_folding() -> anyhow::Result<()> {
+fn stress_test_constant_folding() -> Result<()> {
     let compiled = compile! {
         debug
         "
@@ -94,7 +95,7 @@ fn stress_test_constant_folding() -> anyhow::Result<()> {
 }
 
 #[test]
-fn test_constant_folding_with_variables_mixed_in() -> anyhow::Result<()> {
+fn test_constant_folding_with_variables_mixed_in() -> Result<()> {
     let compiled = compile! {
         debug
         r#"
@@ -120,3 +121,55 @@ fn test_constant_folding_with_variables_mixed_in() -> anyhow::Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn test_ternary_expression() -> Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        let i = 1 > 2 ? 15 : 20;
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            sgt r1 1 2
+            select r2 r1 15 20
+            move r8 r2 #i
+            "
+        }
+    );
+
+    Ok(())
+}
+
+#[test]
+fn test_ternary_expression_assignment() -> Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        let i = 0;
+        i = 1 > 2 ? 15 : 20;
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            move r8 0 #i
+            sgt r1 1 2
+            select r2 r1 15 20
+            move r8 r2 #i
+            "
+        }
+    );
+
+    Ok(())
+}

rust_compiler/libs/compiler/src/test/math_syscall.rs

@@ -243,6 +243,32 @@ fn test_max() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn test_max_from_game() -> Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        let item = 0;
+        item = max(1 + 2, 2);
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            move r8 0 #item
+            max r15 3 2
+            move r8 r15 #item
+            "
+        }
+    );
+
+    Ok(())
+}
+
 #[test]
 fn test_min() -> Result<()> {
     let compiled = compile! {

rust_compiler/libs/compiler/src/test/syscall.rs

@@ -157,3 +157,54 @@ fn test_load_from_device() -> anyhow::Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn test_load_from_slot() -> anyhow::Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        device airCon = "d0";
+
+        let setting = ls(airCon, 0, "Occupied");
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            ls r15 d0 0 Occupied
+            move r8 r15 #setting
+            "
+        }
+    );
+
+    Ok(())
+}
+
+#[test]
+fn test_set_slot() -> anyhow::Result<()> {
+    let compiled = compile! {
+        debug
+        r#"
+        device airCon = "d0";
+
+        ss(airCon, 0, "Occupied", true);
+        "#
+    };
+
+    assert_eq!(
+        compiled,
+        indoc! {
+            "
+            j main
+            main:
+            ss d0 0 Occupied 1
+            "
+        }
+    );
+
+    Ok(())
+}

rust_compiler/libs/compiler/src/v1.rs

@@ -8,7 +8,7 @@ use parser::{
         AssignmentExpression, BinaryExpression, BlockExpression, ConstDeclarationExpression,
         DeviceDeclarationExpression, Expression, FunctionExpression, IfExpression,
         InvocationExpression, Literal, LiteralOr, LiteralOrVariable, LogicalExpression,
-        LoopExpression, MemberAccessExpression, Span, Spanned, WhileExpression,
+        LoopExpression, MemberAccessExpression, Span, Spanned, TernaryExpression, WhileExpression,
     },
 };
 use std::{
@@ -145,6 +145,7 @@ pub struct CompilerConfig {
     pub debug: bool,
 }
 
+#[derive(Debug)]
 struct CompilationResult<'a> {
     location: VariableLocation<'a>,
     /// If Some, this is the name of the temporary variable that holds the result.
@@ -313,6 +314,7 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
                 self.expression_assignment(assign_expr.node, scope)?;
                 Ok(None)
             }
+            Expression::Ternary(tern) => Ok(Some(self.expression_ternary(tern.node, scope)?)),
             Expression::Invocation(expr_invoke) => {
                 self.expression_function_invocation(expr_invoke, scope)?;
                 // Invocation returns result in r15 (RETURN_REGISTER).
@@ -740,6 +742,23 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
 
                 (var_loc, None)
             }
+            Expression::Ternary(ternary) => {
+                let res = self.expression_ternary(ternary.node, scope)?;
+                println!("{res:?}");
+                let var_loc = scope.add_variable(
+                    name_str.clone(),
+                    LocationRequest::Persist,
+                    Some(name_span),
+                )?;
+
+                let res_register = self.resolve_register(&res.location)?;
+                self.emit_variable_assignment(name_str, &var_loc, res_register)?;
+
+                if let Some(name) = res.temp_name {
+                    scope.free_temp(name, None)?;
+                }
+                (var_loc, None)
+            }
             _ => {
                 return Err(Error::Unknown(
                     format!("`{name_str}` declaration of this type is not supported/implemented."),
@@ -865,6 +884,7 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
                     scope.free_temp(c, None)?;
                 }
             }
+
             _ => {
                 return Err(Error::Unknown(
                     "Invalid assignment target. Only variables and member access are supported."
@@ -1207,6 +1227,45 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
         }
     }
 
+    fn expression_ternary(
+        &mut self,
+        expr: TernaryExpression<'a>,
+        scope: &mut VariableScope<'a, '_>,
+    ) -> Result<CompilationResult<'a>, Error<'a>> {
+        let TernaryExpression {
+            condition,
+            true_value,
+            false_value,
+        } = expr;
+
+        let (cond, cond_clean) = self.compile_operand(*condition, scope)?;
+        let (true_val, true_clean) = self.compile_operand(*true_value, scope)?;
+        let (false_val, false_clean) = self.compile_operand(*false_value, scope)?;
+
+        let result_name = self.next_temp_name();
+        let result_loc = scope.add_variable(result_name.clone(), LocationRequest::Temp, None)?;
+        let result_reg = self.resolve_register(&result_loc)?;
+
+        self.write_output(format!(
+            "select {} {} {} {}",
+            result_reg, cond, true_val, false_val
+        ))?;
+
+        if let Some(clean) = cond_clean {
+            scope.free_temp(clean, None)?;
+        }
+        if let Some(clean) = true_clean {
+            scope.free_temp(clean, None)?;
+        }
+        if let Some(clean) = false_clean {
+            scope.free_temp(clean, None)?;
+        }
+        Ok(CompilationResult {
+            location: result_loc,
+            temp_name: Some(result_name),
+        })
+    }
+
     /// Helper to resolve a location to a register string (e.g., "r0").
     /// Note: This does not handle Stack locations automatically, as they require
     /// instruction emission to load. Use `compile_operand` for general handling.
@@ -1952,6 +2011,55 @@ impl<'a, 'w, W: std::io::Write> Compiler<'a, 'w, W> {
                     temp_name: None,
                 }))
             }
+            System::LoadSlot(dev_name, slot_index, logic_type) => {
+                let (dev_hash, hash_cleanup) =
+                    self.compile_literal_or_variable(dev_name.node, scope)?;
+                let (slot_index, slot_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(slot_index.node),
+                    scope,
+                )?;
+                let (logic_type, logic_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(logic_type.node),
+                    scope,
+                )?;
+
+                self.write_output(format!(
+                    "ls r{} {} {} {}",
+                    VariableScope::RETURN_REGISTER,
+                    dev_hash,
+                    slot_index,
+                    logic_type
+                ))?;
+
+                cleanup!(hash_cleanup, slot_cleanup, logic_cleanup);
+
+                Ok(Some(CompilationResult {
+                    location: VariableLocation::Persistant(VariableScope::RETURN_REGISTER),
+                    temp_name: None,
+                }))
+            }
+            System::SetSlot(dev_name, slot_index, logic_type, var) => {
+                let (dev_name, name_cleanup) =
+                    self.compile_literal_or_variable(dev_name.node, scope)?;
+                let (slot_index, index_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(slot_index.node),
+                    scope,
+                )?;
+                let (logic_type, type_cleanup) = self.compile_literal_or_variable(
+                    LiteralOrVariable::Literal(logic_type.node),
+                    scope,
+                )?;
+                let (var, var_cleanup) = self.compile_operand(*var, scope)?;
+
+                self.write_output(format!(
+                    "ss {} {} {} {}",
+                    dev_name, slot_index, logic_type, var
+                ))?;
+
+                cleanup!(name_cleanup, index_cleanup, type_cleanup, var_cleanup);
+
+                Ok(None)
+            }
         }
     }
 

rust_compiler/libs/compiler/src/variable_manager.rs

@@ -52,7 +52,7 @@ pub enum LocationRequest {
     Stack,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum VariableLocation<'a> {
     /// Represents a temporary register (r1 - r7)
     Temporary(u8),
@@ -66,7 +66,6 @@ pub enum VariableLocation<'a> {
     Device(Cow<'a, str>),
 }
 
-// FIX: Added 'b lifetime for the parent reference
 pub struct VariableScope<'a, 'b> {
     temporary_vars: VecDeque<u8>,
     persistant_vars: VecDeque<u8>,
@@ -75,7 +74,6 @@ pub struct VariableScope<'a, 'b> {
     parent: Option<&'b VariableScope<'a, 'b>>,
 }
 
-// FIX: Updated Default impl to include 'b
 impl<'a, 'b> Default for VariableScope<'a, 'b> {
     fn default() -> Self {
         Self {
@@ -88,7 +86,6 @@ impl<'a, 'b> Default for VariableScope<'a, 'b> {
     }
 }
 
-// FIX: Updated impl block to include 'b
 impl<'a, 'b> VariableScope<'a, 'b> {
     #[allow(dead_code)]
     pub const TEMP_REGISTER_COUNT: u8 = 7;
@@ -112,7 +109,6 @@ impl<'a, 'b> VariableScope<'a, 'b> {
             })
     }
 
-    // FIX: parent is now &'b VariableScope<'a, 'b>
     pub fn scoped(parent: &'b VariableScope<'a, 'b>) -> Self {
         Self {
             parent: Option::Some(parent),

rust_compiler/libs/helpers/src/syscall.rs

@@ -9,9 +9,11 @@ macro_rules! with_syscalls {
             "load",
             "loadBatched",
             "loadBatchedNamed",
+            "loadSlot",
             "set",
             "setBatched",
             "setBatchedNamed",
+            "setSlot",
             "acos",
             "asin",
             "atan",
@@ -32,9 +34,11 @@ macro_rules! with_syscalls {
             "l",
             "lb",
             "lbn",
+            "ls",
             "s",
             "sb",
-            "sbn"
+            "sbn",
+            "ss"
         );
     };
 }

rust_compiler/libs/parser/src/lib.rs

@@ -293,12 +293,12 @@ impl<'a> Parser<'a> {
         // Handle Infix operators (Binary, Logical, Assignment)
         if self_matches_peek!(
             self,
-            TokenType::Symbol(s) if s.is_operator() || s.is_comparison() || s.is_logical() || matches!(s, Symbol::Assign)
+            TokenType::Symbol(s) if s.is_operator() || s.is_comparison() || s.is_logical() || matches!(s, Symbol::Assign | Symbol::Question)
         ) {
             return Ok(Some(self.infix(lhs)?));
         } else if self_matches_current!(
             self,
-            TokenType::Symbol(s) if s.is_operator() || s.is_comparison() || s.is_logical() || matches!(s, Symbol::Assign)
+            TokenType::Symbol(s) if s.is_operator() || s.is_comparison() || s.is_logical() || matches!(s, Symbol::Assign | Symbol::Question)
         ) {
             self.tokenizer.seek(SeekFrom::Current(-1))?;
             return Ok(Some(self.infix(lhs)?));
@@ -645,6 +645,15 @@ impl<'a> Parser<'a> {
                 .node
                 .ok_or(Error::UnexpectedEOF)?,
 
+            TokenType::Identifier(ref id) if SysCall::is_syscall(id) => {
+                let spanned_call = self.spanned(|p| p.syscall())?;
+
+                Spanned {
+                    span: spanned_call.span,
+                    node: Expression::Syscall(spanned_call),
+                }
+            }
+
             TokenType::Identifier(_)
                 if self_matches_peek!(self, TokenType::Symbol(Symbol::LParen)) =>
             {
@@ -760,6 +769,7 @@ impl<'a> Parser<'a> {
             | Expression::Priority(_)
             | Expression::Literal(_)
             | Expression::Variable(_)
+            | Expression::Ternary(_)
             | Expression::Negation(_)
             | Expression::MemberAccess(_)
             | Expression::MethodCall(_) => {}
@@ -779,7 +789,7 @@ impl<'a> Parser<'a> {
         // Include Assign in the operator loop
         while token_matches!(
             temp_token,
-            TokenType::Symbol(s) if s.is_operator() || s.is_comparison() || s.is_logical() || matches!(s, Symbol::Assign)
+            TokenType::Symbol(s) if s.is_operator() || s.is_comparison() || s.is_logical() || matches!(s, Symbol::Assign | Symbol::Question | Symbol::Colon)
         ) {
             let operator = match temp_token.token_type {
                 TokenType::Symbol(s) => s,
@@ -1010,7 +1020,52 @@ impl<'a> Parser<'a> {
         }
         operators.retain(|symbol| !matches!(symbol, Symbol::LogicalOr));
 
-        // --- PRECEDENCE LEVEL 8: Assignment (=) ---
+        // -- PRECEDENCE LEVEL 8: Ternary (x ? 1 : 2)
+        for i in (0..operators.len()).rev() {
+            if matches!(operators[i], Symbol::Question) {
+                // Ensure next operator is a colon
+                if i + 1 >= operators.len() || !matches!(operators[i + 1], Symbol::Colon) {
+                    return Err(Error::InvalidSyntax(
+                        self.current_span(),
+                        "Ternary operator '?' missing matching ':'".to_string(),
+                    ));
+                }
+
+                let false_branch = expressions.remove(i + 2);
+                let true_branch = expressions.remove(i + 1);
+                let condition = expressions.remove(i);
+
+                let span = Span {
+                    start_line: condition.span.start_line,
+                    end_line: false_branch.span.end_line,
+                    start_col: condition.span.start_col,
+                    end_col: false_branch.span.end_col,
+                };
+
+                let ternary_node = Spanned {
+                    span,
+                    node: TernaryExpression {
+                        condition: Box::new(condition),
+                        true_value: Box::new(true_branch),
+                        false_value: Box::new(false_branch),
+                    },
+                };
+
+                expressions.insert(
+                    i,
+                    Spanned {
+                        node: Expression::Ternary(ternary_node),
+                        span,
+                    },
+                );
+
+                // Remove the `?` and the `:` from the operators list
+                operators.remove(i);
+                operators.remove(i);
+            }
+        }
+
+        // --- PRECEDENCE LEVEL 9: Assignment (=) ---
         // Assignment is Right Associative: a = b = c => a = (b = c)
         // We iterate Right to Left
         for (i, operator) in operators.iter().enumerate().rev() {
@@ -1050,7 +1105,9 @@ impl<'a> Parser<'a> {
 
         if token_matches!(
             temp_token,
-            TokenType::Symbol(Symbol::Semicolon) | TokenType::Symbol(Symbol::RParen)
+            TokenType::Symbol(Symbol::Semicolon)
+                | TokenType::Symbol(Symbol::RParen)
+                | TokenType::Symbol(Symbol::Comma)
         ) {
             self.tokenizer.seek(SeekFrom::Current(-1))?;
         }
@@ -1518,18 +1575,23 @@ impl<'a> Parser<'a> {
     }
 
     fn syscall(&mut self) -> Result<SysCall<'a>, Error<'a>> {
-        fn check_length<'a>(
-            span: Span,
-            arguments: &[Spanned<Expression<'a>>],
-            length: usize,
-        ) -> Result<(), Error<'a>> {
-            if arguments.len() != length {
+        let invocation = self.invocation()?;
+
+        let check_length = |len: usize| -> Result<(), Error> {
+            if invocation.arguments.len() != len {
                 return Err(Error::InvalidSyntax(
-                    span,
-                    format!("Expected {} arguments", length),
+                    self.current_span(),
+                    format!("Expected {} arguments", len),
                 ));
             }
             Ok(())
+        };
+
+        macro_rules! args {
+            ($count:expr) => {{
+                check_length($count)?;
+                invocation.arguments.into_iter()
+            }};
         }
 
         macro_rules! literal_or_variable {
@@ -1581,23 +1643,19 @@ impl<'a> Parser<'a> {
             };
         }
 
-        let invocation = self.invocation()?;
-
         match invocation.name.node.as_ref() {
             // System SysCalls
             "yield" => {
-                check_length(self.current_span(), &invocation.arguments, 0)?;
+                check_length(0)?;
                 Ok(SysCall::System(sys_call::System::Yield))
             }
             "sleep" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
-                let mut arg = invocation.arguments.into_iter();
-                let expr = arg.next().ok_or(Error::UnexpectedEOF)?;
+                let mut args = args!(1);
+                let expr = args.next().ok_or(Error::UnexpectedEOF)?;
                 Ok(SysCall::System(System::Sleep(boxed!(expr))))
             }
             "hash" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(1);
                 let lit_str = literal_or_variable!(args.next());
 
                 let Spanned {
@@ -1617,8 +1675,7 @@ impl<'a> Parser<'a> {
                 })))
             }
             "load" | "l" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(2);
 
                 let tmp = args.next();
                 let device = literal_or_variable!(tmp);
@@ -1662,8 +1719,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "loadBatched" | "lb" => {
-                check_length(self.current_span(), &invocation.arguments, 3)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(3);
                 let tmp = args.next();
                 let device_hash = literal_or_variable!(tmp);
 
@@ -1680,8 +1736,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "loadBatchedNamed" | "lbn" => {
-                check_length(self.current_span(), &invocation.arguments, 4)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(4);
                 let tmp = args.next();
                 let dev_hash = literal_or_variable!(tmp);
 
@@ -1699,8 +1754,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "set" | "s" => {
-                check_length(self.current_span(), &invocation.arguments, 3)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(3);
                 let tmp = args.next();
                 let device = literal_or_variable!(tmp);
 
@@ -1720,8 +1774,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "setBatched" | "sb" => {
-                check_length(self.current_span(), &invocation.arguments, 3)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(3);
                 let tmp = args.next();
                 let device_hash = literal_or_variable!(tmp);
 
@@ -1739,8 +1792,7 @@ impl<'a> Parser<'a> {
                 )))
             }
             "setBatchedNamed" | "sbn" => {
-                check_length(self.current_span(), &invocation.arguments, 4)?;
-                let mut args = invocation.arguments.into_iter();
+                let mut args = args!(4);
                 let tmp = args.next();
                 let device_hash = literal_or_variable!(tmp);
 
@@ -1760,30 +1812,110 @@ impl<'a> Parser<'a> {
                     expr,
                 )))
             }
+            "loadSlot" | "ls" => {
+                let mut args = args!(3);
+                let next = args.next();
+                let dev_name = literal_or_variable!(next);
+                let next = args.next();
+                let slot_index = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_index,
+                    Spanned {
+                        node: Literal::Number(_),
+                        ..
+                    },
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_index.span,
+                        "Expected a number".to_string(),
+                    ));
+                }
+                let next = args.next();
+                let slot_logic = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_logic,
+                    Spanned {
+                        node: Literal::String(_),
+                        ..
+                    }
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_logic.span,
+                        "Expected a String".into(),
+                    ));
+                }
+
+                Ok(SysCall::System(System::LoadSlot(
+                    dev_name, slot_index, slot_logic,
+                )))
+            }
+            "setSlot" | "ss" => {
+                let mut args = args!(4);
+                let next = args.next();
+                let dev_name = literal_or_variable!(next);
+                let next = args.next();
+                let slot_index = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_index,
+                    Spanned {
+                        node: Literal::Number(_),
+                        ..
+                    }
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_index.span,
+                        "Expected a number".into(),
+                    ));
+                }
+                let next = args.next();
+                let slot_logic = get_arg!(Literal, literal_or_variable!(next));
+                if !matches!(
+                    slot_logic,
+                    Spanned {
+                        node: Literal::String(_),
+                        ..
+                    }
+                ) {
+                    return Err(Error::InvalidSyntax(
+                        slot_logic.span,
+                        "Expected a string".into(),
+                    ));
+                }
+                let next = args.next();
+                let expr = next.ok_or(Error::UnexpectedEOF)?;
+
+                Ok(SysCall::System(System::SetSlot(
+                    dev_name,
+                    slot_index,
+                    slot_logic,
+                    Box::new(expr),
+                )))
+            }
+
             // Math SysCalls
             "acos" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let tmp = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Acos(boxed!(tmp))))
             }
             "asin" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let tmp = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Asin(boxed!(tmp))))
             }
             "atan" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let expr = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Atan(boxed!(expr))))
             }
             "atan2" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
+                check_length(2)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg1 = args.next().ok_or(Error::UnexpectedEOF)?;
                 let arg2 = args.next().ok_or(Error::UnexpectedEOF)?;
@@ -1791,42 +1923,42 @@ impl<'a> Parser<'a> {
                 Ok(SysCall::Math(Math::Atan2(boxed!(arg1), boxed!(arg2))))
             }
             "abs" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let expr = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Abs(boxed!(expr))))
             }
             "ceil" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Ceil(boxed!(arg))))
             }
             "cos" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Cos(boxed!(arg))))
             }
             "floor" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Floor(boxed!(arg))))
             }
             "log" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Log(boxed!(arg))))
             }
             "max" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
+                check_length(2)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg1 = args.next().ok_or(Error::UnexpectedEOF)?;
                 let arg2 = args.next().ok_or(Error::UnexpectedEOF)?;
@@ -1834,7 +1966,7 @@ impl<'a> Parser<'a> {
                 Ok(SysCall::Math(Math::Max(boxed!(arg1), boxed!(arg2))))
             }
             "min" => {
-                check_length(self.current_span(), &invocation.arguments, 2)?;
+                check_length(2)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg1 = args.next().ok_or(Error::UnexpectedEOF)?;
                 let arg2 = args.next().ok_or(Error::UnexpectedEOF)?;
@@ -1842,32 +1974,32 @@ impl<'a> Parser<'a> {
                 Ok(SysCall::Math(Math::Min(boxed!(arg1), boxed!(arg2))))
             }
             "rand" => {
-                check_length(self.current_span(), &invocation.arguments, 0)?;
+                check_length(0)?;
                 Ok(SysCall::Math(Math::Rand))
             }
             "sin" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Sin(boxed!(arg))))
             }
             "sqrt" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Sqrt(boxed!(arg))))
             }
             "tan" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 
                 Ok(SysCall::Math(Math::Tan(boxed!(arg))))
             }
             "trunc" => {
-                check_length(self.current_span(), &invocation.arguments, 1)?;
+                check_length(1)?;
                 let mut args = invocation.arguments.into_iter();
                 let arg = args.next().ok_or(Error::UnexpectedEOF)?;
 

rust_compiler/libs/parser/src/sys_call.rs

@@ -214,6 +214,30 @@ documented! {
             Spanned<Literal<'a>>,
             Box<Spanned<Expression<'a>>>,
         ),
+        /// Loads slot LogicSlotType from device into a variable
+        ///
+        /// ## IC10
+        /// `ls r0 d0 2 Occupied`
+        /// ## Slang
+        /// `let isOccupied = loadSlot(deviceHash, 2, "Occupied");`
+        /// `let isOccupied = ls(deviceHash, 2, "Occupied");`
+        LoadSlot(
+            Spanned<LiteralOrVariable<'a>>,
+            Spanned<Literal<'a>>,
+            Spanned<Literal<'a>>
+        ),
+        /// Stores a value of LogicType on a device by the index value
+        /// ## IC10
+        /// `ss d0 0 "Open" 1`
+        /// ## Slang
+        /// `setSlot(deviceHash, 0, "Open", true);`
+        /// `ss(deviceHash, 0, "Open", true);`
+        SetSlot(
+            Spanned<LiteralOrVariable<'a>>,
+            Spanned<Literal<'a>>,
+            Spanned<Literal<'a>>,
+            Box<Spanned<Expression<'a>>>
+        )
     }
 }
 
@@ -235,6 +259,8 @@ impl<'a> std::fmt::Display for System<'a> {
             System::SetOnDeviceBatchedNamed(a, b, c, d) => {
                 write!(f, "setOnDeviceBatchedNamed({}, {}, {}, {})", a, b, c, d)
             }
+            System::LoadSlot(a, b, c) => write!(f, "loadSlot({}, {}, {})", a, b, c),
+            System::SetSlot(a, b, c, d) => write!(f, "setSlot({}, {}, {}, {})", a, b, c, d),
         }
     }
 }

rust_compiler/libs/parser/src/test/mod.rs

@@ -160,3 +160,37 @@ fn test_negative_literal_const() -> Result<()> {
 
     Ok(())
 }
+
+#[test]
+fn test_ternary_expression() -> Result<()> {
+    let expr = parser!(r#"let i = x ? 1 : 2;"#).parse()?.unwrap();
+
+    assert_eq!("(let i = (x ? 1 : 2))", expr.to_string());
+    Ok(())
+}
+
+#[test]
+fn test_complex_binary_with_ternary() -> Result<()> {
+    let expr = parser!("let i = (x ? 1 : 3) * 2;").parse()?.unwrap();
+
+    assert_eq!("(let i = ((x ? 1 : 3) * 2))", expr.to_string());
+
+    Ok(())
+}
+
+#[test]
+fn test_operator_prescedence_with_ternary() -> Result<()> {
+    let expr = parser!("let x = x ? 1 : 3 * 2;").parse()?.unwrap();
+
+    assert_eq!("(let x = (x ? 1 : (3 * 2)))", expr.to_string());
+
+    Ok(())
+}
+
+#[test]
+fn test_nested_ternary_right_associativity() -> Result<()> {
+    let expr = parser!("let i = a ? b : c ? d : e;").parse()?.unwrap();
+
+    assert_eq!("(let i = (a ? b : (c ? d : e)))", expr.to_string());
+    Ok(())
+}

rust_compiler/libs/parser/src/tree_node.rs

@@ -277,6 +277,23 @@ pub struct WhileExpression<'a> {
     pub body: BlockExpression<'a>,
 }
 
+#[derive(Debug, PartialEq, Eq)]
+pub struct TernaryExpression<'a> {
+    pub condition: Box<Spanned<Expression<'a>>>,
+    pub true_value: Box<Spanned<Expression<'a>>>,
+    pub false_value: Box<Spanned<Expression<'a>>>,
+}
+
+impl<'a> std::fmt::Display for TernaryExpression<'a> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "({} ? {} : {})",
+            self.condition, self.true_value, self.false_value
+        )
+    }
+}
+
 impl<'a> std::fmt::Display for WhileExpression<'a> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "(while {} {})", self.condition, self.body)
@@ -366,6 +383,7 @@ pub enum Expression<'a> {
     Priority(Box<Spanned<Expression<'a>>>),
     Return(Box<Spanned<Expression<'a>>>),
     Syscall(Spanned<SysCall<'a>>),
+    Ternary(Spanned<TernaryExpression<'a>>),
     Variable(Spanned<Cow<'a, str>>),
     While(Spanned<WhileExpression<'a>>),
 }
@@ -393,6 +411,7 @@ impl<'a> std::fmt::Display for Expression<'a> {
             Expression::Priority(e) => write!(f, "({})", e),
             Expression::Return(e) => write!(f, "(return {})", e),
             Expression::Syscall(e) => write!(f, "{}", e),
+            Expression::Ternary(e) => write!(f, "{}", e),
             Expression::Variable(id) => write!(f, "{}", id),
             Expression::While(e) => write!(f, "{}", e),
         }

rust_compiler/libs/tokenizer/src/token.rs

@@ -39,7 +39,7 @@ impl From<LexError> for Diagnostic {
                     ..Default::default()
                 }
             }
-            _ => todo!(),
+            _ => Diagnostic::default(),
         }
     }
 }
@@ -225,6 +225,7 @@ pub enum TokenType<'a> {
     #[token(".", symbol!(Dot))]
     #[token("^", symbol!(Caret))]
     #[token("%", symbol!(Percent))]
+    #[token("?", symbol!(Question))]
     #[token("==", symbol!(Equal))]
     #[token("!=", symbol!(NotEqual))]
     #[token("&&", symbol!(LogicalAnd))]
@@ -535,6 +536,8 @@ pub enum Symbol {
     Caret,
     /// Represents the `%` symbol
     Percent,
+    /// Represents the `?` symbol
+    Question,
 
     // Double Character Symbols
     /// Represents the `==` symbol
@@ -601,6 +604,7 @@ impl std::fmt::Display for Symbol {
             Self::Asterisk => write!(f, "*"),
             Self::Slash => write!(f, "/"),
             Self::LessThan => write!(f, "<"),
+            Self::Question => write!(f, "?"),
             Self::LessThanOrEqual => write!(f, "<="),
             Self::GreaterThan => write!(f, ">"),
             Self::GreaterThanOrEqual => write!(f, ">="),