Initial commit

1 files changed, 30 insertions, 0 deletions

diff --git a/src/commands/eval.rs b/src/commands/eval.rs
new file mode 100644
index 000000000000..112bee64625b
--- /dev/null
+++ b/src/commands/eval.rs
@@ -0,0 +1,30 @@
+use clap::Clap;
+
+use crate::codegen;
+use crate::interpreter;
+use crate::parser;
+use crate::Result;
+
+/// Evaluate an expression and print its result
+#[derive(Clap)]
+pub struct Eval {
+    /// JIT-compile with LLVM instead of interpreting
+    #[clap(long)]
+    jit: bool,
+
+    /// Expression to evaluate
+    expr: String,
+}
+
+impl Eval {
+    pub fn run(self) -> Result<()> {
+        let (_, parsed) = parser::expr(&self.expr)?;
+        let result = if self.jit {
+            codegen::jit_eval::<i64>(&parsed)?.into()
+        } else {
+            interpreter::eval(&parsed)?
+        };
+        println!("{}", result);
+        Ok(())
+    }
+}