49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
use serde::{Deserialize, Serialize};
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use tree_sitter::Node;
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use crate::{AbstractTree, Expression, Result, Statement, Value, VariableMap};
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#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
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pub struct IfElse {
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if_expression: Expression,
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then_statement: Statement,
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else_statement: Option<Statement>,
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}
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impl AbstractTree for IfElse {
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fn from_syntax_node(node: Node, source: &str) -> Result<Self> {
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let if_node = node.child(1).unwrap();
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let if_expression = Expression::from_syntax_node(if_node, source)?;
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let then_node = node.child(3).unwrap();
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let then_statement = Statement::from_syntax_node(then_node, source)?;
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let else_node = node.child(5);
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let else_statement = if let Some(node) = else_node {
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Some(Statement::from_syntax_node(node, source)?)
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} else {
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None
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};
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println!("{if_node:?} {then_node:?} {else_node:?}");
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Ok(IfElse {
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if_expression,
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then_statement,
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else_statement,
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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 if_boolean = self.if_expression.run(context)?.as_boolean()?;
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if if_boolean {
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self.then_statement.run(context)
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} else if let Some(statement) = &self.else_statement {
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statement.run(context)
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} else {
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Ok(Value::Empty)
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}
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}
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}
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