48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
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use serde::{Deserialize, Serialize};
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use crate::{AbstractTree, Expression, Statement};
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#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
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pub struct While {
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expression: Expression,
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statement: Statement,
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}
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impl AbstractTree for While {
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fn from_syntax_node(node: tree_sitter::Node, source: &str) -> crate::Result<Self> {
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debug_assert_eq!("while", node.kind());
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let expression_node = node.child(1).unwrap();
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let expression = Expression::from_syntax_node(expression_node, source)?;
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let statement_node = node.child(3).unwrap();
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let statement = Statement::from_syntax_node(statement_node, source)?;
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Ok(While {
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expression,
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statement,
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})
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}
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fn run(&self, context: &mut crate::VariableMap) -> crate::Result<crate::Value> {
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while self.expression.run(context)?.as_boolean()? {
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self.statement.run(context)?;
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}
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Ok(crate::Value::Empty)
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}
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}
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#[cfg(test)]
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mod tests {
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use crate::evaluate;
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#[test]
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fn evalualate_while_loop() {
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assert_eq!(
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evaluate("while false { 'foo' }"),
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vec![Ok(crate::Value::Empty)]
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)
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}
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}
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