80 lines
2.4 KiB
Rust
80 lines
2.4 KiB
Rust
use crate::{
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context::Context,
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error::{RuntimeError, ValidationError},
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value::ValueInner,
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};
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use super::{AbstractTree, Action, Expression, Type, WithPosition};
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#[derive(Debug, Clone, Eq, PartialEq, PartialOrd, Ord)]
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pub struct FunctionCall {
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function: Box<WithPosition<Expression>>,
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arguments: Vec<WithPosition<Expression>>,
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}
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impl FunctionCall {
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pub fn new(
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function: WithPosition<Expression>,
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arguments: Vec<WithPosition<Expression>>,
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) -> Self {
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FunctionCall {
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function: Box::new(function),
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arguments,
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}
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}
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}
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impl AbstractTree for FunctionCall {
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fn expected_type(&self, _context: &Context) -> Result<Type, ValidationError> {
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let function_node_type = self.function.node.expected_type(_context)?;
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if let Type::Function { return_type, .. } = function_node_type {
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Ok(*return_type)
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} else {
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Err(ValidationError::ExpectedFunction {
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actual: function_node_type,
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position: self.function.position,
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})
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}
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}
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fn validate(&self, _context: &Context) -> Result<(), ValidationError> {
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let function_node_type = self.function.node.expected_type(_context)?;
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if let Type::Function { .. } = function_node_type {
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Ok(())
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} else {
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Err(ValidationError::ExpectedFunction {
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actual: function_node_type,
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position: self.function.position,
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})
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}
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}
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fn run(self, context: &Context) -> Result<Action, RuntimeError> {
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let value = self.function.node.run(context)?.as_return_value()?;
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let function = if let ValueInner::Function(function) = value.inner().as_ref() {
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function
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} else {
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return Err(RuntimeError::ValidationFailure(
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ValidationError::ExpectedFunction {
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actual: value.r#type(),
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position: self.function.position,
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},
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));
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};
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let mut arguments = Vec::with_capacity(self.arguments.len());
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for expression in self.arguments {
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let value = expression.node.run(context)?.as_return_value()?;
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arguments.push(value);
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}
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let function_context = Context::new();
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function_context.inherit_data_from(&context)?;
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function.clone().call(arguments, function_context)
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}
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}
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