73 lines
2.1 KiB
Rust
73 lines
2.1 KiB
Rust
use serde::{Deserialize, Serialize};
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use tree_sitter::Node;
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use crate::{AbstractTree, Result, Value, VariableMap};
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use super::{expression::Expression, identifier::Identifier};
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#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
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pub struct FunctionCall {
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identifier: Identifier,
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expressions: Vec<Expression>,
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}
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impl AbstractTree for FunctionCall {
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fn from_syntax_node(node: Node, source: &str) -> Result<Self> {
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debug_assert_eq!("function_call", node.kind());
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let identifier_node = node.child(1).unwrap();
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let identifier = Identifier::from_syntax_node(identifier_node, source)?;
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let mut expressions = Vec::new();
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let mut current_index = 2;
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while current_index < node.child_count() - 1 {
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let expression_node = node.child(current_index).unwrap();
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let expression = Expression::from_syntax_node(expression_node, source)?;
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expressions.push(expression);
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current_index += 1;
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}
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Ok(FunctionCall {
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identifier,
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expressions,
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})
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}
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fn run(&self, context: &mut VariableMap) -> Result<Value> {
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let identifier = &self.identifier;
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let definition = if let Some(value) = context.get_value(identifier.inner())? {
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value.as_function().cloned()?
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} else {
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return Err(crate::Error::FunctionIdentifierNotFound(identifier.clone()));
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};
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let id_expr_pairs = definition.identifiers().iter().zip(self.expressions.iter());
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for (identifier, expression) in id_expr_pairs {
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let key = identifier.clone().take_inner();
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let value = expression.run(context)?;
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context.set_value(key, value)?;
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}
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let mut results = Vec::with_capacity(self.expressions.len());
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for item in definition.items() {
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let result = item.run(context)?;
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results.push(result);
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}
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for identifier in definition.identifiers() {
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let key = identifier.inner();
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context.remove(&key);
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}
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Ok(Value::List(results))
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}
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}
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