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Implement null statement

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This commit is contained in:
Jeff 2024-07-01 17:49:49 -04:00
parent 7e152f9f51
commit 92f098b58b
2 changed files with 24 additions and 20 deletions
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9
dust-lang/src/abstract_tree/statement.rs
View File

@ -20,6 +20,7 @@ pub enum Statement {
Break(WithPosition<()>),
IfElse(WithPosition<IfElse>),
Loop(WithPosition<Loop>),
Null(WithPosition<()>),
StructureDefinition(WithPosition<StructureDefinition>),
TypeAlias(WithPosition<TypeAlias>),
EnumDeclaration(WithPosition<EnumDeclaration>),
@ -38,6 +39,7 @@ impl Statement {
Statement::Expression(expression) => expression.position(),
Statement::IfElse(inner) => inner.position,
Statement::Loop(inner) => inner.position,
Statement::Null(inner) => inner.position,
Statement::StructureDefinition(inner) => inner.position,
Statement::TypeAlias(inner) => inner.position,
Statement::EnumDeclaration(inner) => inner.position,
@ -65,7 +67,6 @@ impl AbstractNode for Statement {
Statement::Block(block) => block.node.define_types(_context),
Statement::AsyncBlock(async_block) => async_block.node.define_types(_context),
Statement::Assignment(assignment) => assignment.node.define_types(_context),
Statement::Break(_) => Ok(()),
Statement::Loop(r#loop) => r#loop.node.define_types(_context),
Statement::StructureDefinition(struct_definition) => {
struct_definition.node.define_types(_context)
@ -76,6 +77,7 @@ impl AbstractNode for Statement {
}
Statement::While(r#while) => r#while.node.define_types(_context),
Statement::Use(r#use) => r#use.node.define_types(_context),
Statement::Break(_) | Statement::Null(_) => Ok(()),
}
}
@ -88,7 +90,6 @@ impl AbstractNode for Statement {
async_block.node.validate(_context, _manage_memory)
}
Statement::Block(block) => block.node.validate(_context, _manage_memory),
Statement::Break(_) => Ok(()),
Statement::Expression(expression) => expression.validate(_context, _manage_memory),
Statement::IfElse(if_else) => if_else.node.validate(_context, _manage_memory),
Statement::Loop(r#loop) => r#loop.node.validate(_context, _manage_memory),
@ -113,6 +114,7 @@ impl AbstractNode for Statement {
Statement::Expression(expression) => expression.evaluate(context, manage_memory),
Statement::IfElse(if_else) => if_else.node.evaluate(context, manage_memory),
Statement::Loop(r#loop) => r#loop.node.evaluate(context, manage_memory),
Statement::Null(_) => Ok(None),
Statement::StructureDefinition(structure_definition) => {
structure_definition.node.evaluate(context, manage_memory)
}
@ -138,7 +140,6 @@ impl AbstractNode for Statement {
Statement::Block(block) => block.node.expected_type(_context),
Statement::AsyncBlock(async_block) => async_block.node.expected_type(_context),
Statement::Assignment(assignment) => assignment.node.expected_type(_context),
Statement::Break(_) => Ok(None),
Statement::Loop(r#loop) => r#loop.node.expected_type(_context),
Statement::StructureDefinition(struct_definition) => {
struct_definition.node.expected_type(_context)
@ -149,6 +150,7 @@ impl AbstractNode for Statement {
}
Statement::While(r#while) => r#while.node.expected_type(_context),
Statement::Use(r#use) => r#use.node.expected_type(_context),
Statement::Break(_) | Statement::Null(_) => Ok(None),
}
}
}
@ -162,6 +164,7 @@ impl Display for Statement {
Statement::Break(_) => write!(f, "break"),
Statement::IfElse(inner) => write!(f, "{}", inner.node),
Statement::Loop(inner) => write!(f, "{}", inner.node),
Statement::Null(_) => write!(f, ";"),
Statement::StructureDefinition(inner) => write!(f, "{}", inner.node),
Statement::TypeAlias(inner) => write!(f, "{}", inner.node),
Statement::EnumDeclaration(inner) => write!(f, "{}", inner.node),

35
dust-lang/src/parser/mod.rs
View File

@ -781,23 +781,24 @@ pub fn parser<'src>(
Statement::Use(Use::new(text.to_string()).with_position(state.span()))
});
comment
.repeated()
.or_not()
.ignore_then(choice((
assignment,
expression_statement,
async_block,
if_else,
r#break,
block_statement,
r#loop,
r#while,
type_alias,
enum_declaration,
r#use,
)))
.then_ignore(just(Token::Symbol(Symbol::Semicolon)).or_not())
let null = just(Token::Symbol(Symbol::Semicolon))
.ignored()
.map_with(|_, state| Statement::Null(().with_position(state.span())));
comment.repeated().or_not().ignore_then(choice((
assignment,
expression_statement,
async_block,
if_else,
r#break,
block_statement,
r#loop,
r#while,
type_alias,
enum_declaration,
r#use,
null,
)))
});
statement