48 lines
1.4 KiB
Rust
48 lines
1.4 KiB
Rust
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use serde::{Deserialize, Serialize};
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use crate::{AbstractTree, Expression, Identifier, Item, Value};
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#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
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pub struct Transform {
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identifier: Identifier,
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expression: Expression,
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item: Item,
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}
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impl AbstractTree for Transform {
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fn from_syntax_node(source: &str, node: tree_sitter::Node) -> crate::Result<Self> {
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let identifier_node = node.child(1).unwrap();
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let identifier = Identifier::from_syntax_node(source, identifier_node)?;
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let expression_node = node.child(3).unwrap();
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let expression = Expression::from_syntax_node(source, expression_node)?;
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let item_node = node.child(5).unwrap();
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let item = Item::from_syntax_node(source, item_node)?;
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Ok(Transform {
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identifier,
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expression,
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item,
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})
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}
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fn run(&self, source: &str, context: &mut crate::VariableMap) -> crate::Result<crate::Value> {
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let value = self.expression.run(source, context)?;
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let list = value.as_list()?;
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let key = self.identifier.inner();
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let mut context = context.clone();
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let mut new_list = Vec::with_capacity(list.len());
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for value in list {
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context.set_value(key.clone(), value.clone())?;
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let value = self.item.run(source, &mut context)?;
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new_list.push(value);
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}
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Ok(Value::List(new_list))
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}
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}
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