Add instantiation for tuple structs

dust-lang/src/abstract_tree.rs

@@ -6,7 +6,7 @@ use std::{
 
 use serde::{Deserialize, Serialize};
 
-use crate::{BuiltInFunction, Context, Identifier, Span, Type, Value};
+use crate::{BuiltInFunction, Context, Identifier, Span, StructType, Type, Value};
 
 /// In-memory representation of a Dust program.
 #[derive(Debug, Clone, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
@@ -50,17 +50,21 @@ pub enum Statement {
         operand: Box<Node<Statement>>,
     },
 
-    // Function calls
+    // Type definitions
+    StructDefinition(StructDefinition),
+
+    // Function calls and type instantiation
     BuiltInFunctionCall {
         function: BuiltInFunction,
         type_arguments: Option<Vec<Node<Statement>>>,
         value_arguments: Option<Vec<Node<Statement>>>,
     },
-    FunctionCall {
+    Invokation {
-        function: Box<Node<Statement>>,
+        invokee: Box<Node<Statement>>,
         type_arguments: Option<Vec<Node<Statement>>>,
         value_arguments: Option<Vec<Node<Statement>>>,
     },
+    StructInstantiation(StructInstantiation),
 
     // Loops
     While {
@@ -103,9 +107,6 @@ pub enum Statement {
     // A statement that always returns None. Created with a semicolon, it causes the preceding
     // statement to return None. This is analagous to the semicolon or unit type in Rust.
     Nil(Box<Node<Statement>>),
-
-    // Type definitions
-    StructDefinition(StructDefinition),
 }
 
 impl Statement {
@@ -159,7 +160,9 @@ impl Statement {
             },
             Statement::BuiltInFunctionCall { function, .. } => function.expected_return_type(),
             Statement::Constant(value) => Some(value.r#type()),
-            Statement::FunctionCall { function, .. } => function.inner.expected_type(context),
+            Statement::Invokation {
+                invokee: function, ..
+            } => function.inner.expected_type(context),
             Statement::Identifier(identifier) => context.get_type(identifier),
             Statement::If { .. } => None,
             Statement::IfElse { if_body, .. } => if_body.inner.expected_type(context),
@@ -190,6 +193,17 @@ impl Statement {
                 UnaryOperator::Not => Some(Type::Boolean),
             },
             Statement::StructDefinition(_) => None,
+            Statement::StructInstantiation(struct_instantiation) => match struct_instantiation {
+                StructInstantiation::Tuple { name, fields } => {
+                    Some(Type::Struct(StructType::Tuple {
+                        name: name.inner.clone(),
+                        fields: fields
+                            .iter()
+                            .map(|field| field.inner.expected_type(context))
+                            .collect::<Option<Vec<Type>>>()?,
+                    }))
+                }
+            },
             Statement::While { .. } => None,
         }
     }
@@ -287,8 +301,8 @@ impl Display for Statement {
                 write!(f, ")")
             }
             Statement::Constant(value) => write!(f, "{value}"),
-            Statement::FunctionCall {
+            Statement::Invokation {
-                function,
+                invokee: function,
                 type_arguments: type_parameters,
                 value_arguments: value_parameters,
             } => {
@@ -398,6 +412,9 @@ impl Display for Statement {
             Statement::StructDefinition(struct_definition) => {
                 write!(f, "{struct_definition}")
             }
+            Statement::StructInstantiation(struct_instantiation) => {
+                write!(f, "{struct_instantiation}")
+            }
             Statement::While { condition, body } => {
                 write!(f, "while {condition} {body}")
             }
@@ -471,3 +488,32 @@ impl Display for StructDefinition {
         }
     }
 }
+
+#[derive(Debug, Clone, Eq, PartialEq, PartialOrd, Ord, Serialize, Deserialize)]
+pub enum StructInstantiation {
+    // The Unit variant is absent because unit structs are instantiated without any fields
+    Tuple {
+        name: Node<Identifier>,
+        fields: Vec<Node<Statement>>,
+    },
+}
+
+impl Display for StructInstantiation {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        match self {
+            StructInstantiation::Tuple { name, fields } => {
+                write!(f, "{name}(")?;
+
+                for (i, field) in fields.iter().enumerate() {
+                    if i > 0 {
+                        write!(f, ", ")?;
+                    }
+
+                    write!(f, "{field}")?;
+                }
+
+                write!(f, ")")
+            }
+        }
+    }
+}

dust-lang/src/analyzer.rs

@@ -10,7 +10,7 @@ use std::{
 };
 
 use crate::{
-    abstract_tree::{BinaryOperator, UnaryOperator},
+    abstract_tree::{BinaryOperator, StructInstantiation, UnaryOperator},
     parse, AbstractSyntaxTree, Context, DustError, Identifier, Node, Span, Statement,
     StructDefinition, StructType, Type,
 };
@@ -290,8 +290,8 @@ impl<'a> Analyzer<'a> {
                 }
             }
             Statement::Constant(_) => {}
-            Statement::FunctionCall {
+            Statement::Invokation {
-                function,
+                invokee: function,
                 value_arguments,
                 ..
             } => {
@@ -429,13 +429,31 @@ impl<'a> Analyzer<'a> {
                             name: name.inner.clone(),
                         }),
                     ),
-                    StructDefinition::Tuple { name, fields } => {
+                    StructDefinition::Tuple { name, fields } => (
-                        todo!()
+                        name.inner.clone(),
-                    }
+                        Type::Struct(StructType::Tuple {
+                            name: name.inner.clone(),
+                            fields: fields
+                                .iter()
+                                .map(|type_node| type_node.inner.clone())
+                                .collect(),
+                        }),
+                    ),
                 };
 
                 self.context.set_type(name, r#type, node.position);
             }
+            Statement::StructInstantiation(struct_instantiation) => {
+                let name = match struct_instantiation {
+                    StructInstantiation::Tuple { name, .. } => name,
+                };
+
+                if self.context.get_type(&name.inner).is_none() {
+                    return Err(AnalyzerError::UndefinedType {
+                        identifier: name.clone(),
+                    });
+                }
+            }
             Statement::UnaryOperation { operator, operand } => {
                 self.analyze_statement(operand)?;
 
@@ -517,19 +535,22 @@ pub enum AnalyzerError {
         actual_type: Type,
         expected: Type,
     },
-    UndefinedVariable {
-        identifier: Node<Statement>,
-    },
     UndefinedField {
         identifier: Node<Statement>,
         map: Node<Statement>,
     },
+    UndefinedType {
+        identifier: Node<Identifier>,
+    },
     UnexpectedIdentifier {
         identifier: Node<Statement>,
     },
     UnexectedString {
         actual: Node<Statement>,
     },
+    UndefinedVariable {
+        identifier: Node<Statement>,
+    },
 }
 
 impl AnalyzerError {
@@ -550,6 +571,7 @@ impl AnalyzerError {
                 actual_statement, ..
             } => actual_statement.position,
             AnalyzerError::UndefinedField { identifier, .. } => identifier.position,
+            AnalyzerError::UndefinedType { identifier } => identifier.position,
             AnalyzerError::UndefinedVariable { identifier } => identifier.position,
             AnalyzerError::UnexpectedIdentifier { identifier } => identifier.position,
             AnalyzerError::UnexectedString { actual } => actual.position,
@@ -606,6 +628,9 @@ impl Display for AnalyzerError {
             AnalyzerError::UndefinedField { identifier, map } => {
                 write!(f, "Undefined field {} in map {}", identifier, map)
             }
+            AnalyzerError::UndefinedType { identifier } => {
+                write!(f, "Undefined type {}", identifier)
+            }
             AnalyzerError::UndefinedVariable { identifier } => {
                 write!(f, "Undefined variable {}", identifier)
             }

dust-lang/src/lib.rs

@@ -15,7 +15,8 @@ pub mod value;
 pub mod vm;
 
 pub use abstract_tree::{
-    AbstractSyntaxTree, BinaryOperator, Node, Statement, StructDefinition, UnaryOperator,
+    AbstractSyntaxTree, BinaryOperator, Node, Statement, StructDefinition, StructInstantiation,
+    UnaryOperator,
 };
 pub use analyzer::{analyze, Analyzer, AnalyzerError};
 pub use built_in_function::{BuiltInFunction, BuiltInFunctionError};

dust-lang/src/parser.rs

@@ -686,8 +686,8 @@ impl<'src> Parser<'src> {
                 ));
             }
 
-            if let Statement::FunctionCall {
+            if let Statement::Invokation {
-                function,
+                invokee: function,
                 type_arguments,
                 value_arguments,
             } = right.inner
@@ -701,8 +701,8 @@ impl<'src> Parser<'src> {
                 };
 
                 return Ok(Node::new(
-                    Statement::FunctionCall {
+                    Statement::Invokation {
-                        function,
+                        invokee: function,
                         type_arguments,
                         value_arguments,
                     },
@@ -762,7 +762,38 @@ impl<'src> Parser<'src> {
     fn parse_postfix(&mut self, left: Node<Statement>) -> Result<Node<Statement>, ParseError> {
         let left_start = left.position.0;
 
-        let statement = if let Token::LeftSquareBrace = &self.current.0 {
+        let statement = match &self.current.0 {
+            Token::LeftParenthesis => {
+                self.next_token()?;
+
+                let mut arguments = Vec::new();
+
+                while self.current.0 != Token::RightParenthesis {
+                    let argument = self.parse_statement(0)?;
+
+                    arguments.push(argument);
+
+                    if let Token::Comma = self.current.0 {
+                        self.next_token()?;
+                    } else {
+                        break;
+                    }
+                }
+
+                let right_end = self.current.1 .1;
+
+                self.next_token()?;
+
+                Node::new(
+                    Statement::Invokation {
+                        invokee: Box::new(left),
+                        type_arguments: None,
+                        value_arguments: Some(arguments),
+                    },
+                    (left_start, right_end),
+                )
+            }
+            Token::LeftSquareBrace => {
                 let operator_start = self.current.1 .0;
 
                 self.next_token()?;
@@ -788,22 +819,28 @@ impl<'src> Parser<'src> {
                 Node::new(
                     Statement::BinaryOperation {
                         left: Box::new(left),
-                    operator: Node::new(BinaryOperator::ListIndex, (operator_start, operator_end)),
+                        operator: Node::new(
+                            BinaryOperator::ListIndex,
+                            (operator_start, operator_end),
+                        ),
                         right: Box::new(index),
                     },
                     (left_start, right_end),
                 )
-        } else if let Token::Semicolon = &self.current.0 {
+            }
+            Token::Semicolon => {
                 let operator_end = self.current.1 .1;
 
                 self.next_token()?;
 
                 Node::new(Statement::Nil(Box::new(left)), (left_start, operator_end))
-        } else {
+            }
+            _ => {
                 return Err(ParseError::UnexpectedToken {
                     actual: self.current.0.to_owned(),
                     position: self.current.1,
                 });
+            }
         };
 
         if self.current.0.is_postfix() {
@@ -990,10 +1027,50 @@ impl Display for ParseError {
 
 #[cfg(test)]
 mod tests {
-    use crate::{BinaryOperator, Identifier, StructDefinition, Type, UnaryOperator};
+    use crate::{
+        BinaryOperator, Identifier, StructDefinition, StructInstantiation, Type, UnaryOperator,
+    };
 
     use super::*;
 
+    #[test]
+    fn tuple_struct_instantiation() {
+        let input = "struct Foo(int, float) Foo(1, 2.0)";
+
+        assert_eq!(
+            parse(input),
+            Ok(AbstractSyntaxTree {
+                nodes: [
+                    Node::new(
+                        Statement::StructDefinition(StructDefinition::Tuple {
+                            name: Node::new(Identifier::new("Foo"), (7, 10)),
+                            fields: vec![
+                                Node::new(Type::Integer, (11, 14)),
+                                Node::new(Type::Float, (16, 21))
+                            ]
+                        }),
+                        (0, 22)
+                    ),
+                    Node::new(
+                        Statement::Invokation {
+                            invokee: Box::new(Node::new(
+                                Statement::Identifier(Identifier::new("Foo")),
+                                (23, 26)
+                            )),
+                            type_arguments: None,
+                            value_arguments: Some(vec![
+                                Node::new(Statement::Constant(Value::integer(1)), (27, 28)),
+                                Node::new(Statement::Constant(Value::float(2.0)), (30, 33))
+                            ])
+                        },
+                        (23, 34)
+                    )
+                ]
+                .into()
+            })
+        );
+    }
+
     #[test]
     fn tuple_struct() {
         let input = "struct Foo(int, float)";

dust-lang/src/token.rs

@@ -223,7 +223,7 @@ impl<'src> Token<'src> {
     pub fn precedence(&self) -> u8 {
         match self {
             Token::Dot => 10,
-            Token::LeftSquareBrace => 9,
+            Token::LeftParenthesis | Token::LeftSquareBrace => 9,
             Token::Star | Token::Slash | Token::Percent => 8,
             Token::Minus | Token::Plus => 6,
             Token::DoubleEqual
@@ -261,7 +261,10 @@ impl<'src> Token<'src> {
     }
 
     pub fn is_postfix(&self) -> bool {
-        matches!(self, Token::LeftSquareBrace | Token::Semicolon)
+        matches!(
+            self,
+            Token::LeftParenthesis | Token::LeftSquareBrace | Token::Semicolon
+        )
     }
 }
 

dust-lang/src/type.rs

@@ -16,7 +16,7 @@ use std::{
 
 use serde::{Deserialize, Serialize};
 
-use crate::{Identifier, Struct};
+use crate::Identifier;
 
 #[derive(Clone, Debug, Eq, PartialEq, Serialize, Deserialize)]
 pub struct TypeConflict {
@@ -344,7 +344,7 @@ pub enum StructType {
     },
     Tuple {
         name: Identifier,
-        types: Vec<Type>,
+        fields: Vec<Type>,
     },
     Fields {
         name: Identifier,
@@ -352,26 +352,17 @@ pub enum StructType {
     },
 }
 
-impl StructType {
-    pub fn instantiate(&self) -> Struct {
-        match self {
-            StructType::Unit { name } => Struct::Unit { name: name.clone() },
-            _ => todo!(),
-        }
-    }
-}
-
 impl Display for StructType {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
         match self {
             StructType::Unit { name } => write!(f, "struct {name}"),
-            StructType::Tuple { name, types } => {
+            StructType::Tuple { name, fields } => {
                 write!(f, "struct {name}(")?;
 
-                for (index, r#type) in types.iter().enumerate() {
+                for (index, r#type) in fields.iter().enumerate() {
                     write!(f, "{type}")?;
 
-                    if index != types.len() - 1 {
+                    if index != fields.len() - 1 {
                         write!(f, ", ")?;
                     }
                 }

dust-lang/src/vm.rs

@@ -11,8 +11,8 @@ use std::{
 
 use crate::{
     parse, value::ValueInner, AbstractSyntaxTree, Analyzer, BinaryOperator, BuiltInFunctionError,
-    Context, DustError, Identifier, Node, ParseError, Span, Statement, StructDefinition,
+    Context, DustError, Identifier, Node, ParseError, Span, Statement, Struct, StructDefinition,
-    StructType, Type, UnaryOperator, Value, ValueError,
+    StructInstantiation, StructType, Type, UnaryOperator, Value, ValueError,
 };
 
 /// Run the source code and return the result.
@@ -329,17 +329,43 @@ impl Vm {
                 Ok(function_call_return)
             }
             Statement::Constant(value) => Ok(Some(value.clone())),
-            Statement::FunctionCall {
+            Statement::Invokation {
-                function: function_node,
+                invokee,
                 type_arguments: _,
                 value_arguments: value_parameter_nodes,
             } => {
-                let function_position = function_node.position;
+                let invokee_position = invokee.position;
-                let function_value = if let Some(value) = self.run_statement(*function_node)? {
+                let invokee_type = invokee.inner.expected_type(&self.context);
+
+                if let Some(Type::Struct(StructType::Tuple { name, .. })) = invokee_type {
+                    let mut fields = Vec::new();
+
+                    if let Some(value_parameter_nodes) = value_parameter_nodes {
+                        for statement in value_parameter_nodes {
+                            let position = statement.position;
+                            let value = if let Some(value) = self.run_statement(statement)? {
+                                value
+                            } else {
+                                return Err(VmError::ExpectedValue { position });
+                            };
+
+                            fields.push(value);
+                        }
+                    }
+
+                    let struct_value = Value::r#struct(Struct::Tuple {
+                        name: name.clone(),
+                        fields,
+                    });
+
+                    return Ok(Some(struct_value));
+                }
+
+                let function_value = if let Some(value) = self.run_statement(*invokee)? {
                     value
                 } else {
                     return Err(VmError::ExpectedValue {
-                        position: function_position,
+                        position: invokee_position,
                     });
                 };
                 let function = if let Some(function) = function_value.as_function() {
@@ -347,7 +373,7 @@ impl Vm {
                 } else {
                     return Err(VmError::ExpectedFunction {
                         actual: function_value,
-                        position: function_position,
+                        position: invokee_position,
                     });
                 };
 
@@ -385,8 +411,8 @@ impl Vm {
 
                 println!("{type_option:?}");
 
-                if let Some(Type::Struct(struct_type)) = type_option {
+                if let Some(Type::Struct(StructType::Unit { name })) = type_option {
-                    return Ok(Some(Value::r#struct(struct_type.instantiate())));
+                    return Ok(Some(Value::r#struct(Struct::Unit { name })));
                 }
 
                 Err(VmError::UndefinedVariable {
@@ -592,15 +618,40 @@ impl Vm {
                             name: name.inner.clone(),
                         }),
                     ),
-                    StructDefinition::Tuple { name, fields } => {
+                    StructDefinition::Tuple { name, fields } => (
-                        todo!()
+                        name.inner.clone(),
-                    }
+                        Type::Struct(StructType::Tuple {
+                            name: name.inner.clone(),
+                            fields: fields
+                                .into_iter()
+                                .map(|type_node| type_node.inner)
+                                .collect(),
+                        }),
+                    ),
                 };
 
                 self.context.set_type(type_name, r#type, node.position);
 
                 Ok(None)
             }
+            Statement::StructInstantiation(struct_instantiation) => match struct_instantiation {
+                StructInstantiation::Tuple { name, fields } => {
+                    Ok(Some(Value::r#struct(Struct::Tuple {
+                        name: name.inner,
+                        fields: fields
+                            .into_iter()
+                            .map(|node| {
+                                let position = node.position;
+                                if let Some(value) = self.run_statement(node)? {
+                                    Ok(value)
+                                } else {
+                                    Err(VmError::ExpectedValue { position })
+                                }
+                            })
+                            .collect::<Result<Vec<Value>, VmError>>()?,
+                    })))
+                }
+            },
             Statement::UnaryOperation { operator, operand } => {
                 let position = operand.position;
                 let value = if let Some(value) = self.run_statement(*operand)? {
@@ -815,6 +866,19 @@ mod tests {
 
     use super::*;
 
+    #[test]
+    fn define_and_instantiate_tuple_struct() {
+        let input = "struct Foo(int) Foo(42)";
+
+        assert_eq!(
+            run(input),
+            Ok(Some(Value::r#struct(Struct::Tuple {
+                name: Identifier::new("Foo"),
+                fields: vec![Value::integer(42)]
+            })))
+        );
+    }
+
     #[test]
     fn assign_unit_struct_variable() {
         let input = "