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use crate::{AsgConvertError, ConstValue, Expression, ExpressionNode, FromAst, Node, PartialType, Scope, Span, Type};
use leo_ast::SpreadOrExpression;
use std::{
cell::RefCell,
sync::{Arc, Weak},
};
pub struct ArrayInlineExpression {
pub parent: RefCell<Option<Weak<Expression>>>,
pub span: Option<Span>,
pub elements: Vec<(Arc<Expression>, bool)>,
}
impl ArrayInlineExpression {
pub fn expanded_length(&self) -> usize {
self.elements
.iter()
.map(|(expr, is_spread)| {
if *is_spread {
match expr.get_type() {
Some(Type::Array(_item, len)) => len,
_ => 0,
}
} else {
1
}
})
.sum()
}
}
impl Node for ArrayInlineExpression {
fn span(&self) -> Option<&Span> {
self.span.as_ref()
}
}
impl ExpressionNode for ArrayInlineExpression {
fn set_parent(&self, parent: Weak<Expression>) {
self.parent.replace(Some(parent));
}
fn get_parent(&self) -> Option<Arc<Expression>> {
self.parent.borrow().as_ref().map(Weak::upgrade).flatten()
}
fn enforce_parents(&self, expr: &Arc<Expression>) {
self.elements.iter().for_each(|(element, _)| {
element.set_parent(Arc::downgrade(expr));
})
}
fn get_type(&self) -> Option<Type> {
Some(Type::Array(
Box::new(self.elements.first()?.0.get_type()?),
self.expanded_length(),
))
}
fn is_mut_ref(&self) -> bool {
false
}
fn const_value(&self) -> Option<ConstValue> {
let mut const_values = vec![];
for (expr, spread) in self.elements.iter() {
if *spread {
match expr.const_value()? {
ConstValue::Array(items) => const_values.extend(items),
_ => return None,
}
} else {
const_values.push(expr.const_value()?);
}
}
Some(ConstValue::Array(const_values))
}
fn is_consty(&self) -> bool {
self.elements.iter().all(|x| x.0.is_consty())
}
}
impl FromAst<leo_ast::ArrayInlineExpression> for ArrayInlineExpression {
fn from_ast(
scope: &Scope,
value: &leo_ast::ArrayInlineExpression,
expected_type: Option<PartialType>,
) -> Result<ArrayInlineExpression, AsgConvertError> {
let (mut expected_item, expected_len) = match expected_type {
Some(PartialType::Array(item, dims)) => (item.map(|x| *x), dims),
None => (None, None),
Some(type_) => {
return Err(AsgConvertError::unexpected_type(
&type_.to_string(),
Some("array"),
&value.span,
));
}
};
let mut len = 0;
let output = ArrayInlineExpression {
parent: RefCell::new(None),
span: Some(value.span.clone()),
elements: value
.elements
.iter()
.map(|e| match e {
SpreadOrExpression::Expression(e) => {
let expr = Arc::<Expression>::from_ast(scope, e, expected_item.clone())?;
if expected_item.is_none() {
expected_item = expr.get_type().map(Type::partial);
}
len += 1;
Ok((expr, false))
}
SpreadOrExpression::Spread(e) => {
let expr = Arc::<Expression>::from_ast(
scope,
e,
Some(PartialType::Array(expected_item.clone().map(Box::new), None)),
)?;
match expr.get_type() {
Some(Type::Array(item, spread_len)) => {
if expected_item.is_none() {
expected_item = Some((*item).partial());
}
len += spread_len;
}
type_ => {
return Err(AsgConvertError::unexpected_type(
expected_item
.as_ref()
.map(|x| x.to_string())
.as_deref()
.unwrap_or("unknown"),
type_.map(|x| x.to_string()).as_deref(),
&value.span,
));
}
}
Ok((expr, true))
}
})
.collect::<Result<Vec<_>, AsgConvertError>>()?,
};
if let Some(expected_len) = expected_len {
if len != expected_len {
return Err(AsgConvertError::unexpected_type(
&*format!("array of length {}", expected_len),
Some(&*format!("array of length {}", len)),
&value.span,
));
}
}
Ok(output)
}
}
impl Into<leo_ast::ArrayInlineExpression> for &ArrayInlineExpression {
fn into(self) -> leo_ast::ArrayInlineExpression {
leo_ast::ArrayInlineExpression {
elements: self
.elements
.iter()
.map(|(element, spread)| {
let element = element.as_ref().into();
if *spread {
SpreadOrExpression::Spread(element)
} else {
SpreadOrExpression::Expression(element)
}
})
.collect(),
span: self.span.clone().unwrap_or_default(),
}
}
}