Replace num-bigint with malachite-bigint (#18)

Co-authored-by: Jeong YunWon <jeong@youknowone.org>

ast/Cargo.toml

@@ -8,7 +8,7 @@ repository = "https://github.com/RustPython/Parser/"
 license = "MIT"
 
 [features]
-default = ["location"]
+default = ["location", "malachite-bigint"]
 constant-optimization = ["fold"]
 location = ["fold", "rustpython-parser-core/location"]
 fold = []
@@ -21,7 +21,6 @@ rustpython-parser-core = { workspace = true }
 rustpython-literal = { workspace = true, optional = true }
 
 is-macro = { workspace = true }
-num-bigint = { workspace = true }
+num-bigint = { workspace = true, optional = true }
+malachite-bigint = { workspace = true, optional = true }
 static_assertions = "1.1.0"
-
-pyo3 = { workspace = true, optional = true, features = ["num-bigint", "num-complex"] }

ast/src/builtin.rs

@@ -1,6 +1,6 @@
 //! `builtin_types` in asdl.py and Attributed
 
-use num_bigint::BigInt;
+use crate::bigint::BigInt;
 
 pub type String = std::string::String;
 

ast/src/lib.rs

@@ -14,6 +14,11 @@ mod ranged;
 #[cfg(feature = "unparse")]
 mod unparse;
 
+#[cfg(feature = "malachite-bigint")]
+pub use malachite_bigint as bigint;
+#[cfg(feature = "num-bigint")]
+pub use num_bigint as bigint;
+
 pub use builtin::*;
 pub use generic::*;
 pub use ranged::Ranged;

ast/src/optimizer.rs

@@ -55,7 +55,7 @@ impl<U> crate::fold::Fold<U> for ConstantOptimizer {
 
 #[cfg(test)]
 mod tests {
-    use num_bigint::BigInt;
+    use crate::bigint::BigInt;
     use rustpython_parser_core::text_size::TextRange;
 
     #[cfg(feature = "constant-optimization")]