From 117901cec8cdf5b19d895139f31f7f4300e1cce1 Mon Sep 17 00:00:00 2001
From: Louis Capitanchik <contact@louiscap.co>
Date: Tue, 16 May 2023 17:32:58 +0100
Subject: [PATCH] Print statement in interpreter
---
.../src/runtime/executor/simple.rs | 24 +++++++++++++++++--
1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/forge-script-lang/src/runtime/executor/simple.rs b/forge-script-lang/src/runtime/executor/simple.rs
index 6dbd2c3..13cad9a 100644
--- a/forge-script-lang/src/runtime/executor/simple.rs
+++ b/forge-script-lang/src/runtime/executor/simple.rs
@@ -1,5 +1,6 @@
use crate::parse::ast::{
- BinaryOp, DeclareFunction, ExpressionList, Program, UnaryOp, ValueExpression, VoidExpression,
+ BinaryOp, DeclareFunction, ExpressionList, Print, Program, UnaryOp, ValueExpression,
+ VoidExpression,
};
use crate::runtime::executor::Visitor;
use crate::runtime::value::{ForgeValue, UnsupportedOperation};
@@ -110,7 +111,19 @@ impl Visitor for SimpleExecutor {
&mut self,
expression: &VoidExpression,
) -> Result<Self::Output, Self::Error> {
- Err(RuntimeError::Unsupported("Void Expression"))
+ match expression {
+ VoidExpression::ConditionLoop(_) => {
+ return Err(RuntimeError::Unsupported("ConditionLoop"))
+ }
+ VoidExpression::Import(_) => return Err(RuntimeError::Unsupported("Import")),
+ VoidExpression::Export(_) => return Err(RuntimeError::Unsupported("Export")),
+ VoidExpression::Print(Print { expr }) => {
+ let value = self.evaluate_value_expression(expr.as_ref())?;
+ println!("{}", value);
+ }
+ }
+
+ Ok(ForgeValue::Null)
}
fn evaluate_program(&mut self, program: &Program) -> Result<Self::Output, Self::Error> {
@@ -154,4 +167,11 @@ mod interpreter_test {
let mut vm = SimpleExecutor::default();
assert_eq!(vm.evaluate_program(&add_numbers), Ok(ForgeValue::from(0)));
}
+
+ #[test]
+ fn print() {
+ let print_4 = parse_program("print 2 + 2").expect("Failed to parse");
+ let mut vm = SimpleExecutor::default();
+ assert_eq!(vm.evaluate_program(&print_4), Ok(ForgeValue::Null));
+ }
}
--
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