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Begin improving errors

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This commit is contained in:
Jeff 2024-03-18 03:24:41 -04:00
parent 3a97ba76a0
commit 1750132ed8
9 changed files with 253 additions and 123 deletions
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38
src/abstract_tree/assignment.rs
View File

@ -7,7 +7,7 @@ use super::{AbstractTree, Action, Identifier, Statement, Type, WithPosition};
#[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
pub struct Assignment {
identifier: Identifier,
identifier: WithPosition<Identifier>,
r#type: Option<WithPosition<Type>>,
operator: AssignmentOperator,
statement: Box<WithPosition<Statement>>,
@ -22,7 +22,7 @@ pub enum AssignmentOperator {
impl Assignment {
pub fn new(
identifier: Identifier,
identifier: WithPosition<Identifier>,
r#type: Option<WithPosition<Type>>,
operator: AssignmentOperator,
statement: WithPosition<Statement>,
@ -57,12 +57,12 @@ impl AbstractTree for Assignment {
}
})?;
context.set_type(self.identifier.clone(), expected_type.clone())?;
context.set_type(self.identifier.node.clone(), expected_type.clone())?;
} else {
context.set_type(self.identifier.clone(), statement_type)?;
context.set_type(self.identifier.node.clone(), statement_type)?;
}
self.identifier.validate(context)?;
self.identifier.node.validate(context)?;
self.statement.node.validate(context)?;
Ok(())
@ -77,27 +77,33 @@ impl AbstractTree for Assignment {
match self.operator {
AssignmentOperator::Assign => {
context.set_value(self.identifier, value)?;
context.set_value(self.identifier.node, value)?;
}
AssignmentOperator::AddAssign => {
if let Some(previous_value) = context.get_value(&self.identifier)? {
if let Some(previous_value) = context.get_value(&self.identifier.node)? {
let new_value = previous_value.add(&value)?;
context.set_value(self.identifier, new_value)?;
context.set_value(self.identifier.node, new_value)?;
} else {
return Err(RuntimeError::ValidationFailure(
ValidationError::VariableNotFound(self.identifier),
ValidationError::VariableNotFound {
identifier: self.identifier.node,
position: self.identifier.position,
},
));
}
}
AssignmentOperator::SubAssign => {
if let Some(previous_value) = context.get_value(&self.identifier)? {
if let Some(previous_value) = context.get_value(&self.identifier.node)? {
let new_value = previous_value.subtract(&value)?;
context.set_value(self.identifier, new_value)?;
context.set_value(self.identifier.node, new_value)?;
} else {
return Err(RuntimeError::ValidationFailure(
ValidationError::VariableNotFound(self.identifier),
ValidationError::VariableNotFound {
identifier: self.identifier.node,
position: self.identifier.position,
},
));
}
}
@ -122,7 +128,7 @@ mod tests {
let context = Context::new();
Assignment::new(
Identifier::new("foobar"),
Identifier::new("foobar").with_position((0, 0)),
None,
AssignmentOperator::Assign,
Statement::Expression(Expression::Value(ValueNode::Integer(42))).with_position((0, 0)),
@ -145,7 +151,7 @@ mod tests {
.unwrap();
Assignment::new(
Identifier::new("foobar"),
Identifier::new("foobar").with_position((0, 0)),
None,
AssignmentOperator::AddAssign,
Statement::Expression(Expression::Value(ValueNode::Integer(41))).with_position((0, 0)),
@ -168,7 +174,7 @@ mod tests {
.unwrap();
Assignment::new(
Identifier::new("foobar"),
Identifier::new("foobar").with_position((0, 0)),
None,
AssignmentOperator::SubAssign,
Statement::Expression(Expression::Value(ValueNode::Integer(1))).with_position((0, 0)),
@ -185,7 +191,7 @@ mod tests {
#[test]
fn type_check() {
let validation = Assignment::new(
Identifier::new("foobar"),
Identifier::new("foobar").with_position((0, 0)),
Some(WithPosition {
node: Type::Boolean,
position: (0, 0).into(),

18
src/abstract_tree/function_call.rs
View File

@ -52,7 +52,14 @@ impl AbstractTree for FunctionCall {
}
fn run(self, context: &Context) -> Result<Action, RuntimeError> {
let value = self.function.node.run(context)?.as_return_value()?;
let action = self.function.node.run(context)?;
let value = if let Action::Return(value) = action {
value
} else {
return Err(RuntimeError::ValidationFailure(
ValidationError::InterpreterExpectedReturn(self.function.position),
));
};
let function = if let ValueInner::Function(function) = value.inner().as_ref() {
function
} else {
@ -66,7 +73,14 @@ impl AbstractTree for FunctionCall {
let mut arguments = Vec::with_capacity(self.arguments.len());
for expression in self.arguments {
let value = expression.node.run(context)?.as_return_value()?;
let action = expression.node.run(context)?;
let value = if let Action::Return(value) = action {
value
} else {
return Err(RuntimeError::ValidationFailure(
ValidationError::InterpreterExpectedReturn(expression.position),
));
};
arguments.push(value);
}

15
src/abstract_tree/identifier.rs
View File

@ -28,7 +28,10 @@ impl AbstractTree for Identifier {
if let Some(r#type) = context.get_type(self)? {
Ok(r#type)
} else {
Err(ValidationError::VariableNotFound(self.clone()))
Err(ValidationError::VariableNotFound {
identifier: todo!(),
position: todo!(),
})
}
}
@ -36,7 +39,10 @@ impl AbstractTree for Identifier {
if context.contains(self)? {
Ok(())
} else {
Err(ValidationError::VariableNotFound(self.clone()))
Err(ValidationError::VariableNotFound {
identifier: todo!(),
position: todo!(),
})
}
}
@ -47,7 +53,10 @@ impl AbstractTree for Identifier {
Ok(action)
} else {
Err(RuntimeError::ValidationFailure(
ValidationError::VariableNotFound(self.clone()),
ValidationError::VariableNotFound {
identifier: todo!(),
position: todo!(),
},
))
}
}

14
src/abstract_tree/list_index.rs
View File

@ -54,9 +54,10 @@ impl AbstractTree for ListIndex {
Ok(())
} else {
Err(ValidationError::CannotIndexWith {
collection_type: todo!(),
index_type: todo!(),
position: todo!(),
collection_type: left_type,
collection_position: self.left.position,
index_type: right_type,
index_position: self.right.position,
})
}
}
@ -82,9 +83,10 @@ impl AbstractTree for ListIndex {
} else {
Err(RuntimeError::ValidationFailure(
ValidationError::CannotIndexWith {
collection_type: todo!(),
index_type: todo!(),
position: todo!(),
collection_type: left_value.r#type(),
collection_position: self.left.position,
index_type: right_value.r#type(),
index_position: self.right.position,
},
))
}

9
src/abstract_tree/map_index.rs
View File

@ -72,8 +72,9 @@ impl AbstractTree for MapIndex {
Err(ValidationError::CannotIndexWith {
collection_type: left_type,
collection_position: todo!(),
index_type: self.right.node.expected_type(_context)?,
position: self.right.position,
index_position: self.right.position,
})
}
@ -91,8 +92,9 @@ impl AbstractTree for MapIndex {
} else {
Err(ValidationError::CannotIndexWith {
collection_type: left_type,
collection_position: self.left.position,
index_type: self.right.node.expected_type(context)?,
position: self.right.position,
index_position: self.right.position,
})
}
}
@ -113,8 +115,9 @@ impl AbstractTree for MapIndex {
Err(RuntimeError::ValidationFailure(
ValidationError::CannotIndexWith {
collection_type: collection.r#type(),
collection_position: todo!(),
index_type: self.right.node.expected_type(_context)?,
position: self.right.position,
index_position: self.right.position,
},
))
}

10
src/abstract_tree/mod.rs
View File

@ -80,13 +80,3 @@ pub enum Action {
Break,
None,
}
impl Action {
pub fn as_return_value(self) -> Result<Value, ValidationError> {
if let Action::Return(value) = self {
Ok(value)
} else {
Err(ValidationError::InterpreterExpectedReturn)
}
}
}

179
src/error.rs
View File

@ -1,6 +1,6 @@
use std::{io, ops::Range, sync::PoisonError};
use ariadne::{Color, Fmt, Label, ReportBuilder};
use ariadne::{Color, Fmt, Label, Report, ReportBuilder, ReportKind};
use chumsky::{prelude::Rich, span::Span};
use crate::{
@ -29,61 +29,93 @@ pub enum Error {
}
impl Error {
pub fn build_report(
self,
mut builder: ReportBuilder<'_, Range<usize>>,
) -> ReportBuilder<'_, Range<usize>> {
let type_color = Color::Green;
match self {
pub fn build_report<'a>(self) -> ReportBuilder<'a, (&'a str, Range<usize>)> {
let (mut builder, validation_error) = match &self {
Error::Parse { expected, span } => {
let message = match expected.as_str() {
"" => "Invalid character.".to_string(),
expected => format!("Expected {expected}."),
let message = if expected.is_empty() {
"Invalid token.".to_string()
} else {
format!("Expected {expected}.")
};
builder = builder.with_note("Parsing error.");
builder.add_label(Label::new(span.0..span.1).with_message(message));
(
Report::build(
ReportKind::Custom("Parsing Error", Color::White),
"input",
span.1,
)
.with_label(
Label::new(("input", span.0..span.1))
.with_message(message)
.with_color(Color::Red),
),
None,
)
}
Error::Lex { expected, span } => {
let message = match expected.as_str() {
"" => "Invalid character.".to_string(),
expected => format!("Expected {expected}."),
let message = if expected.is_empty() {
"Invalid token.".to_string()
} else {
format!("Expected {expected}.")
};
builder = builder.with_note("Lexing error.");
builder.add_label(Label::new(span.0..span.1).with_message(message));
(
Report::build(
ReportKind::Custom("Dust Error", Color::White),
"input",
span.1,
)
.with_label(
Label::new(("input", span.0..span.1))
.with_message(message)
.with_color(Color::Red),
),
None,
)
}
Error::Runtime { error, position } => match error {
RuntimeError::RwLockPoison(_) => todo!(),
RuntimeError::ValidationFailure(validation_error) => {
builder =
Error::Validation {
error: validation_error,
position,
}
.build_report(builder.with_note(
"The interpreter failed to catch this error during validation.",
));
}
RuntimeError::Io(_) => todo!(),
Error::Runtime { error, position } => (
Report::build(
ReportKind::Custom("Dust Error", Color::White),
"input",
position.1,
),
if let RuntimeError::ValidationFailure(validation_error) = error {
Some(validation_error)
} else {
None
},
Error::Validation { error, position } => match error {
),
Error::Validation { error, position } => (
Report::build(
ReportKind::Custom("Dust Error", Color::White),
"input",
position.1,
),
Some(error),
),
};
let type_color = Color::Green;
if let Some(validation_error) = validation_error {
match validation_error {
ValidationError::ExpectedBoolean { actual, position } => {
builder.add_label(Label::new(position.0..position.1).with_message(format!(
builder.add_label(Label::new(("input", position.0..position.1)).with_message(
format!(
"Expected {} but got {}.",
"boolean".fg(type_color),
actual.fg(type_color)
)));
),
));
}
ValidationError::ExpectedIntegerOrFloat => {
builder.add_label(Label::new(position.0..position.1).with_message(format!(
ValidationError::ExpectedIntegerOrFloat(position) => {
builder.add_label(Label::new(("input", position.0..position.1)).with_message(
format!(
"Expected {} or {}.",
"integer".fg(type_color),
"float".fg(type_color)
)));
),
));
}
ValidationError::RwLockPoison(_) => todo!(),
ValidationError::TypeCheck {
@ -94,39 +126,54 @@ impl Error {
let TypeConflict { actual, expected } = conflict;
builder.add_labels([
Label::new(expected_postion.0..expected_postion.1).with_message(format!(
"Type {} established here.",
expected.fg(type_color)
)),
Label::new(actual_position.0..actual_position.1)
Label::new(("input", expected_postion.0..expected_postion.1)).with_message(
format!("Type {} established here.", expected.fg(type_color)),
),
Label::new(("input", actual_position.0..actual_position.1))
.with_message(format!("Got type {} here.", actual.fg(type_color))),
]);
}
ValidationError::VariableNotFound(identifier) => {
ValidationError::VariableNotFound {
identifier,
position,
} => {
builder.add_label(
Label::new(position.0..position.1)
Label::new(("input", position.0..position.1))
.with_message(format!("The variable {identifier} does not exist."))
.with_priority(1),
);
}
ValidationError::CannotIndex { r#type, position } => builder.add_label(
Label::new(position.0..position.1)
Label::new(("input", position.0..position.1))
.with_message(format!("Cannot index into a {}.", r#type.fg(type_color))),
),
ValidationError::CannotIndexWith {
collection_type,
collection_position,
index_type,
position,
} => builder.add_label(Label::new(position.0..position.1).with_message(format!(
"Cannot index into a {} with a {}.",
index_position,
} => {
builder = builder.with_message(format!(
"Cannot index into {} with {}.",
collection_type.clone().fg(type_color),
index_type.clone().fg(type_color)
));
builder.add_labels([
Label::new(("input", collection_position.0..collection_position.1))
.with_message(format!(
"This has type {}.",
collection_type.fg(type_color),
index_type.fg(type_color)
))),
ValidationError::InterpreterExpectedReturn => todo!(),
)),
Label::new(("input", index_position.0..index_position.1))
.with_message(format!("This has type {}.", index_type.fg(type_color),)),
])
}
ValidationError::InterpreterExpectedReturn(_) => todo!(),
ValidationError::ExpectedFunction { .. } => todo!(),
ValidationError::ExpectedValue => todo!(),
ValidationError::PropertyNotFound(_) => todo!(),
},
ValidationError::ExpectedValue(_) => todo!(),
ValidationError::PropertyNotFound { .. } => todo!(),
}
}
builder
@ -197,8 +244,9 @@ pub enum ValidationError {
},
CannotIndexWith {
collection_type: Type,
collection_position: SourcePosition,
index_type: Type,
position: SourcePosition,
index_position: SourcePosition,
},
ExpectedBoolean {
actual: Type,
@ -208,9 +256,9 @@ pub enum ValidationError {
actual: Type,
position: SourcePosition,
},
ExpectedIntegerOrFloat,
ExpectedValue,
InterpreterExpectedReturn,
ExpectedIntegerOrFloat(SourcePosition),
ExpectedValue(SourcePosition),
InterpreterExpectedReturn(SourcePosition),
RwLockPoison(RwLockPoisonError),
TypeCheck {
/// The mismatch that caused the error.
@ -222,8 +270,15 @@ pub enum ValidationError {
/// The position of the item that gave the "expected" type.
expected_position: SourcePosition,
},
VariableNotFound(Identifier),
PropertyNotFound(Identifier),
VariableNotFound {
identifier: Identifier,
position: SourcePosition,
},
PropertyNotFound {
identifier: Identifier,
position: SourcePosition,
},
}
impl From<RwLockPoisonError> for ValidationError {

63
src/main.rs
View File

@ -1,12 +1,13 @@
//! Command line interface for the dust programming language.
use ariadne::{Color, Report, ReportKind, Source};
use ariadne::{sources, Color, Label, Report, ReportKind, Source};
use chumsky::span::SimpleSpan;
use clap::Parser;
use colored::Colorize;
use std::{fs::read_to_string, io::Write};
use std::{fs::read_to_string, io::Write, ops::Range};
use dust_lang::{context::Context, Interpreter};
use dust_lang::{context::Context, error::Error, Interpreter};
/// Command-line arguments to be parsed.
#[derive(Parser, Debug)]
@ -53,17 +54,63 @@ fn main() {
}
}
Err(errors) => {
let mut report_builder =
Report::build(ReportKind::Custom("Dust Error", Color::White), (), 5);
for error in errors {
report_builder = error.build_report(report_builder);
let mut report_builder = match &error {
Error::Parse { expected, span } => {
let message = if expected.is_empty() {
"Invalid token.".to_string()
} else {
format!("Expected {expected}.")
};
Report::build(
ReportKind::Custom("Parsing Error", Color::White),
"input",
span.1,
)
.with_label(
Label::new(("input", span.0..span.1))
.with_message(message)
.with_color(Color::Red),
)
}
Error::Lex { expected, span } => {
let message = if expected.is_empty() {
"Invalid token.".to_string()
} else {
format!("Expected {expected}.")
};
Report::build(
ReportKind::Custom("Dust Error", Color::White),
"input",
span.1,
)
.with_label(
Label::new(("input", span.0..span.1))
.with_message(message)
.with_color(Color::Red),
)
}
Error::Runtime { error, position } => Report::build(
ReportKind::Custom("Dust Error", Color::White),
"input",
position.1,
),
Error::Validation { error, position } => Report::build(
ReportKind::Custom("Dust Error", Color::White),
"input",
position.1,
),
};
report_builder = error.build_report(report_builder);
report_builder
.finish()
.eprint(Source::from(source))
.eprint(sources([("input", &source)]))
.unwrap()
}
}
}
}

6
src/parser.rs
View File

@ -47,6 +47,10 @@ pub fn parser<'src>() -> DustParser<'src> {
}
};
let positioned_identifier = identifier
.clone()
.map_with(|identifier, state| identifier.with_position(state.span()));
let basic_value = select! {
Token::Boolean(boolean) => ValueNode::Boolean(boolean),
Token::Float(float) => ValueNode::Float(float),
@ -360,7 +364,7 @@ pub fn parser<'src>() -> DustParser<'src> {
let r#break = just(Token::Keyword("break"))
.map_with(|_, state| Statement::Break.with_position(state.span()));
let assignment = identifier
let assignment = positioned_identifier
.clone()
.then(type_specification.clone().or_not())
.then(choice((