basic type inference #2
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@ -368,3 +368,599 @@ fn infer_list_comprehension<'b: 'a, 'a>(
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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use crate::context::*;
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use crate::typedef::*;
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use rustpython_parser::parser::parse_expression;
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use std::collections::HashMap;
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use std::rc::Rc;
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fn get_inference_context(ctx: TopLevelContext) -> InferenceContext {
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InferenceContext::new(ctx, Box::new(|_| Err("unbounded identifier".into())))
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}
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#[test]
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fn test_constants() {
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let ctx = basic_ctx();
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let mut ctx = get_inference_context(ctx);
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let ast = parse_expression("123").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("2147483647").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("2147483648").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT64_TYPE));
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let ast = parse_expression("9223372036854775807").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT64_TYPE));
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let ast = parse_expression("9223372036854775808").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("integer out of range".into()));
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let ast = parse_expression("123.456").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(FLOAT_TYPE));
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let ast = parse_expression("True").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(BOOL_TYPE));
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let ast = parse_expression("False").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(BOOL_TYPE));
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}
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#[test]
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fn test_identifier() {
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let ctx = basic_ctx();
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let mut ctx = get_inference_context(ctx);
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ctx.assign("abc", ctx.get_primitive(INT32_TYPE)).unwrap();
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let ast = parse_expression("abc").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("ab").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("unbounded identifier".into()));
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}
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#[test]
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fn test_list() {
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let mut ctx = basic_ctx();
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ctx.add_fn(
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"foo",
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FnDef {
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args: vec![],
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result: None,
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},
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);
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let mut ctx = get_inference_context(ctx);
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ctx.assign("abc", ctx.get_primitive(INT32_TYPE)).unwrap();
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// def is reserved...
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ctx.assign("efg", ctx.get_primitive(INT32_TYPE)).unwrap();
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ctx.assign("xyz", ctx.get_primitive(FLOAT_TYPE)).unwrap();
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let ast = parse_expression("[]").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(
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result.unwrap().unwrap(),
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ParametricType(LIST_TYPE, vec![BotType.into()]).into()
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);
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let ast = parse_expression("[abc]").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(
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result.unwrap().unwrap(),
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ParametricType(LIST_TYPE, vec![ctx.get_primitive(INT32_TYPE)]).into()
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);
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let ast = parse_expression("[abc, efg]").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(
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result.unwrap().unwrap(),
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ParametricType(LIST_TYPE, vec![ctx.get_primitive(INT32_TYPE)]).into()
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);
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let ast = parse_expression("[abc, efg, xyz]").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("inhomogeneous list is not allowed".into()));
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let ast = parse_expression("[foo()]").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("list elements must have some type".into()));
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}
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#[test]
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fn test_tuple() {
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let mut ctx = basic_ctx();
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ctx.add_fn(
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"foo",
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FnDef {
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args: vec![],
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result: None,
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},
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);
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let mut ctx = get_inference_context(ctx);
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ctx.assign("abc", ctx.get_primitive(INT32_TYPE)).unwrap();
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ctx.assign("efg", ctx.get_primitive(FLOAT_TYPE)).unwrap();
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let ast = parse_expression("(abc, efg)").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(
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result.unwrap().unwrap(),
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ParametricType(
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TUPLE_TYPE,
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vec![ctx.get_primitive(INT32_TYPE), ctx.get_primitive(FLOAT_TYPE)]
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)
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.into()
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);
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let ast = parse_expression("(abc, efg, foo())").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("tuple elements must have some type".into()));
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}
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#[test]
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fn test_attribute() {
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let mut ctx = basic_ctx();
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ctx.add_fn(
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"none",
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FnDef {
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args: vec![],
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result: None,
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},
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);
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let int32 = ctx.get_primitive(INT32_TYPE);
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let float = ctx.get_primitive(FLOAT_TYPE);
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let foo = ctx.add_class(ClassDef {
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base: TypeDef {
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name: "Foo",
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fields: HashMap::new(),
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methods: HashMap::new(),
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},
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parents: vec![],
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});
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let foo_def = ctx.get_class_def_mut(foo);
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foo_def.base.fields.insert("a", int32.clone());
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foo_def.base.fields.insert("b", ClassType(foo).into());
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foo_def.base.fields.insert("c", int32.clone());
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let bar = ctx.add_class(ClassDef {
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base: TypeDef {
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name: "Bar",
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fields: HashMap::new(),
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methods: HashMap::new(),
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},
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parents: vec![],
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});
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let bar_def = ctx.get_class_def_mut(bar);
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bar_def.base.fields.insert("a", int32);
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bar_def.base.fields.insert("b", ClassType(bar).into());
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bar_def.base.fields.insert("c", float);
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let v0 = ctx.add_variable(VarDef {
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name: "v0",
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bound: vec![],
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});
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let v1 = ctx.add_variable(VarDef {
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name: "v1",
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bound: vec![ClassType(foo).into(), ClassType(bar).into()],
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});
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let mut ctx = get_inference_context(ctx);
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ctx.assign("foo", Rc::new(ClassType(foo))).unwrap();
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ctx.assign("bar", Rc::new(ClassType(bar))).unwrap();
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ctx.assign("foobar", Rc::new(VirtualClassType(foo)))
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.unwrap();
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ctx.assign("v0", ctx.get_variable(v0)).unwrap();
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ctx.assign("v1", ctx.get_variable(v1)).unwrap();
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ctx.assign("bot", Rc::new(BotType)).unwrap();
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let ast = parse_expression("foo.a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("foo.d").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("no such field".into()));
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let ast = parse_expression("foobar.a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("v0.a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("no fields on unbounded type variable".into()));
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let ast = parse_expression("v1.a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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// shall we support this?
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let ast = parse_expression("v1.b").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(
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result,
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Err("unknown field (type mismatch between variants)".into())
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);
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// assert_eq!(result.unwrap().unwrap(), TypeVariable(v1).into());
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let ast = parse_expression("v1.c").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(
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result,
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Err("unknown field (type mismatch between variants)".into())
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);
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let ast = parse_expression("v1.d").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("unknown field".into()));
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let ast = parse_expression("none().a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("no value".into()));
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let ast = parse_expression("bot.a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("this object has no fields".into()));
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}
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#[test]
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fn test_bool_ops() {
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let mut ctx = basic_ctx();
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ctx.add_fn(
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"none",
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FnDef {
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args: vec![],
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result: None,
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},
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);
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let mut ctx = get_inference_context(ctx);
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let ast = parse_expression("True and False").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(BOOL_TYPE));
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let ast = parse_expression("True and none()").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("no value".into()));
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let ast = parse_expression("True and 123").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("bool operands must be bool".into()));
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}
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#[test]
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fn test_bin_ops() {
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let mut ctx = basic_ctx();
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let v0 = ctx.add_variable(VarDef {
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name: "v0",
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bound: vec![ctx.get_primitive(INT32_TYPE), ctx.get_primitive(INT64_TYPE)],
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});
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let mut ctx = get_inference_context(ctx);
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ctx.assign("a", TypeVariable(v0).into()).unwrap();
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let ast = parse_expression("1 + 2 + 3").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("a + a + a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), TypeVariable(v0).into());
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}
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#[test]
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fn test_unary_ops() {
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let mut ctx = basic_ctx();
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let v0 = ctx.add_variable(VarDef {
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name: "v0",
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bound: vec![ctx.get_primitive(INT32_TYPE), ctx.get_primitive(INT64_TYPE)],
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});
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let mut ctx = get_inference_context(ctx);
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ctx.assign("a", TypeVariable(v0).into()).unwrap();
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let ast = parse_expression("-(123)").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
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let ast = parse_expression("-a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), TypeVariable(v0).into());
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let ast = parse_expression("not True").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(BOOL_TYPE));
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let ast = parse_expression("not (1)").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("logical not must be applied to bool".into()));
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}
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#[test]
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fn test_compare() {
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let mut ctx = basic_ctx();
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let v0 = ctx.add_variable(VarDef {
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name: "v0",
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bound: vec![ctx.get_primitive(INT32_TYPE), ctx.get_primitive(INT64_TYPE)],
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});
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let mut ctx = get_inference_context(ctx);
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ctx.assign("a", TypeVariable(v0).into()).unwrap();
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let ast = parse_expression("a == a == a").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(BOOL_TYPE));
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let ast = parse_expression("a == a == 1").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("not equal".into()));
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let ast = parse_expression("True > False").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("no such function".into()));
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let ast = parse_expression("True in False").unwrap();
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let result = infer_expr(&mut ctx, &ast);
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assert_eq!(result, Err("unsupported comparison".into()));
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}
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#[test]
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fn test_call() {
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let mut ctx = basic_ctx();
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ctx.add_fn(
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"none",
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FnDef {
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args: vec![],
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result: None,
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},
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);
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let foo = ctx.add_class(ClassDef {
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base: TypeDef {
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name: "Foo",
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fields: HashMap::new(),
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methods: HashMap::new(),
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},
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parents: vec![],
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});
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let foo_def = ctx.get_class_def_mut(foo);
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foo_def.base.methods.insert(
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"a",
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FnDef {
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args: vec![],
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result: Some(Rc::new(ClassType(foo))),
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},
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);
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let bar = ctx.add_class(ClassDef {
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base: TypeDef {
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name: "Bar",
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fields: HashMap::new(),
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methods: HashMap::new(),
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},
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parents: vec![],
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});
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let bar_def = ctx.get_class_def_mut(bar);
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bar_def.base.methods.insert(
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"a",
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FnDef {
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args: vec![],
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result: Some(Rc::new(ClassType(bar))),
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},
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);
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let v0 = ctx.add_variable(VarDef {
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name: "v0",
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bound: vec![],
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});
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let v1 = ctx.add_variable(VarDef {
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name: "v1",
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bound: vec![ClassType(foo).into(), ClassType(bar).into()],
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});
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let v2 = ctx.add_variable(VarDef {
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name: "v2",
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bound: vec![
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ClassType(foo).into(),
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ClassType(bar).into(),
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ctx.get_primitive(INT32_TYPE),
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],
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});
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let mut ctx = get_inference_context(ctx);
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ctx.assign("foo", Rc::new(ClassType(foo))).unwrap();
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ctx.assign("bar", Rc::new(ClassType(bar))).unwrap();
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ctx.assign("foobar", Rc::new(VirtualClassType(foo)))
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.unwrap();
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ctx.assign("v0", ctx.get_variable(v0)).unwrap();
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ctx.assign("v1", ctx.get_variable(v1)).unwrap();
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ctx.assign("v2", ctx.get_variable(v2)).unwrap();
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ctx.assign("bot", Rc::new(BotType)).unwrap();
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|
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let ast = parse_expression("foo.a()").unwrap();
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let result = infer_expr(&mut ctx, &ast);
|
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assert_eq!(result.unwrap().unwrap(), ClassType(foo).into());
|
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|
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let ast = parse_expression("v1.a()").unwrap();
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let result = infer_expr(&mut ctx, &ast);
|
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assert_eq!(result.unwrap().unwrap(), TypeVariable(v1).into());
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|
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let ast = parse_expression("foobar.a()").unwrap();
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let result = infer_expr(&mut ctx, &ast);
|
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assert_eq!(result.unwrap().unwrap(), ClassType(foo).into());
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|
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let ast = parse_expression("none().a()").unwrap();
|
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let result = infer_expr(&mut ctx, &ast);
|
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assert_eq!(result, Err("no value".into()));
|
||||
|
||||
let ast = parse_expression("bot.a()").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("not supported".into()));
|
||||
|
||||
let ast = parse_expression("[][0].a()").unwrap();
|
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let result = infer_expr(&mut ctx, &ast);
|
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assert_eq!(result, Err("not supported".into()));
|
||||
|
||||
let ast = parse_expression("v0.a()").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("unbounded type var".into()));
|
||||
|
||||
let ast = parse_expression("v2.a()").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("no such function".into()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn infer_subscript() {
|
||||
let mut ctx = basic_ctx();
|
||||
ctx.add_fn(
|
||||
"none",
|
||||
FnDef {
|
||||
args: vec![],
|
||||
result: None,
|
||||
},
|
||||
);
|
||||
let mut ctx = get_inference_context(ctx);
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
|
||||
|
||||
let ast = parse_expression("[[1]][0][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][1:2]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(
|
||||
result.unwrap().unwrap(),
|
||||
ParametricType(LIST_TYPE, vec![ctx.get_primitive(INT32_TYPE)]).into()
|
||||
);
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][1:2:2]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(
|
||||
result.unwrap().unwrap(),
|
||||
ParametricType(LIST_TYPE, vec![ctx.get_primitive(INT32_TYPE)]).into()
|
||||
);
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][1:1.2]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("slice must be int32 type".into()));
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][1:none()]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("slice must have type".into()));
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][1.2]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("index must be either slice or int32".into()));
|
||||
|
||||
let ast = parse_expression("[1, 2, 3][none()]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("no value".into()));
|
||||
|
||||
let ast = parse_expression("none()[1.2]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("no value".into()));
|
||||
|
||||
let ast = parse_expression("123[1]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(
|
||||
result,
|
||||
Err("subscript is not supported for types other than list".into())
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_if_expr() {
|
||||
let mut ctx = basic_ctx();
|
||||
ctx.add_fn(
|
||||
"none",
|
||||
FnDef {
|
||||
args: vec![],
|
||||
result: None,
|
||||
},
|
||||
);
|
||||
let mut ctx = get_inference_context(ctx);
|
||||
|
||||
let ast = parse_expression("1 if True else 0").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result.unwrap().unwrap(), ctx.get_primitive(INT32_TYPE));
|
||||
|
||||
let ast = parse_expression("none() if True else none()").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result.unwrap(), None);
|
||||
|
||||
let ast = parse_expression("none() if 1 else none()").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("test should be bool".into()));
|
||||
|
||||
let ast = parse_expression("1 if True else none()").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("divergent type".into()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_list_comp() {
|
||||
let mut ctx = basic_ctx();
|
||||
ctx.add_fn(
|
||||
"none",
|
||||
FnDef {
|
||||
args: vec![],
|
||||
result: None,
|
||||
},
|
||||
);
|
||||
let int32 = ctx.get_primitive(INT32_TYPE);
|
||||
let mut ctx = get_inference_context(ctx);
|
||||
ctx.assign("z", int32.clone()).unwrap();
|
||||
|
||||
let ast = parse_expression("[x for x in [(1, 2), (2, 3), (3, 4)]][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(
|
||||
result.unwrap().unwrap(),
|
||||
ParametricType(TUPLE_TYPE, vec![int32.clone(), int32.clone()]).into()
|
||||
);
|
||||
|
||||
let ast = parse_expression("[x for (x, y) in [(1, 2), (2, 3), (3, 4)]][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result.unwrap().unwrap(), int32);
|
||||
|
||||
let ast =
|
||||
parse_expression("[x for (x, y) in [(1, 2), (2, 3), (3, 4)] if x > 0][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result.unwrap().unwrap(), int32);
|
||||
|
||||
let ast = parse_expression("[x for (x, y) in [(1, 2), (2, 3), (3, 4)] if x][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("test must be bool".into()));
|
||||
|
||||
let ast = parse_expression("[y for x in []][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("unbounded identifier".into()));
|
||||
|
||||
let ast = parse_expression("[none() for x in []][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("no value".into()));
|
||||
|
||||
let ast = parse_expression("[z for z in []][0]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(result, Err("duplicated naming".into()));
|
||||
|
||||
let ast = parse_expression("[x for x in [] for y in []]").unwrap();
|
||||
let result = infer_expr(&mut ctx, &ast);
|
||||
assert_eq!(
|
||||
result,
|
||||
Err("only 1 generator statement is supported".into())
|
||||
);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue