Support builtins (#50)

resources/test/src/F821.py

@@ -12,3 +12,5 @@ def get_name():
 
 def get_name(self):
     return self.name
+
+x = list()

src/builtins.rs

@@ -0,0 +1,163 @@
+pub const BUILTINS: &[&str] = &[
+    "ArithmeticError",
+    "AssertionError",
+    "AttributeError",
+    "BaseException",
+    "BlockingIOError",
+    "BrokenPipeError",
+    "BufferError",
+    "BytesWarning",
+    "ChildProcessError",
+    "ConnectionAbortedError",
+    "ConnectionError",
+    "ConnectionRefusedError",
+    "ConnectionResetError",
+    "DeprecationWarning",
+    "EOFError",
+    "Ellipsis",
+    "EnvironmentError",
+    "Exception",
+    "False",
+    "FileExistsError",
+    "FileNotFoundError",
+    "FloatingPointError",
+    "FutureWarning",
+    "GeneratorExit",
+    "IOError",
+    "ImportError",
+    "ImportWarning",
+    "IndentationError",
+    "IndexError",
+    "InterruptedError",
+    "IsADirectoryError",
+    "KeyError",
+    "KeyboardInterrupt",
+    "LookupError",
+    "MemoryError",
+    "ModuleNotFoundError",
+    "NameError",
+    "None",
+    "NotADirectoryError",
+    "NotImplemented",
+    "NotImplementedError",
+    "OSError",
+    "OverflowError",
+    "PendingDeprecationWarning",
+    "PermissionError",
+    "ProcessLookupError",
+    "RecursionError",
+    "ReferenceError",
+    "ResourceWarning",
+    "RuntimeError",
+    "RuntimeWarning",
+    "StopAsyncIteration",
+    "StopIteration",
+    "SyntaxError",
+    "SyntaxWarning",
+    "SystemError",
+    "SystemExit",
+    "TabError",
+    "TimeoutError",
+    "True",
+    "TypeError",
+    "UnboundLocalError",
+    "UnicodeDecodeError",
+    "UnicodeEncodeError",
+    "UnicodeError",
+    "UnicodeTranslateError",
+    "UnicodeWarning",
+    "UserWarning",
+    "ValueError",
+    "Warning",
+    "ZeroDivisionError",
+    "__build_class__",
+    "__debug__",
+    "__doc__",
+    "__import__",
+    "__loader__",
+    "__name__",
+    "__package__",
+    "__spec__",
+    "abs",
+    "all",
+    "any",
+    "ascii",
+    "bin",
+    "bool",
+    "breakpoint",
+    "bytearray",
+    "bytes",
+    "callable",
+    "chr",
+    "classmethod",
+    "compile",
+    "complex",
+    "copyright",
+    "credits",
+    "delattr",
+    "dict",
+    "dir",
+    "divmod",
+    "enumerate",
+    "eval",
+    "exec",
+    "exit",
+    "filter",
+    "float",
+    "format",
+    "frozenset",
+    "getattr",
+    "globals",
+    "hasattr",
+    "hash",
+    "help",
+    "hex",
+    "id",
+    "input",
+    "int",
+    "isinstance",
+    "issubclass",
+    "iter",
+    "len",
+    "license",
+    "list",
+    "locals",
+    "map",
+    "max",
+    "memoryview",
+    "min",
+    "next",
+    "object",
+    "oct",
+    "open",
+    "ord",
+    "pow",
+    "print",
+    "property",
+    "quit",
+    "range",
+    "repr",
+    "reversed",
+    "round",
+    "set",
+    "setattr",
+    "slice",
+    "sorted",
+    "staticmethod",
+    "str",
+    "sum",
+    "super",
+    "tuple",
+    "type",
+    "vars",
+    "zip",
+];
+
+// Globally defined names which are not attributes of the builtins module, or are only present on
+// some platforms.
+pub const MAGIC_GLOBALS: &[&str] = &[
+    "__file__",
+    "__builtins__",
+    "__annotations__",
+    "WindowsError",
+];

src/check_ast.rs

@@ -1,6 +1,7 @@
 use std::collections::{BTreeMap, BTreeSet};
 use std::sync::atomic::{AtomicUsize, Ordering};
 
+use crate::builtins::{BUILTINS, MAGIC_GLOBALS};
 use rustpython_parser::ast::{
     Arg, Arguments, Constant, Expr, ExprContext, ExprKind, Location, Stmt, StmtKind, Suite,
 };
@@ -45,6 +46,7 @@ enum BindingKind {
     Assignment,
     ClassDefinition,
     Definition,
+    Builtin,
     FutureImportation,
     Importation(String),
     StarImportation,
@@ -408,6 +410,25 @@ impl Checker<'_> {
             .push(self.scopes.pop().expect("Attempted to pop without scope."));
     }
 
+    fn bind_builtins(&mut self) {
+        for builtin in BUILTINS {
+            self.add_binding(Binding {
+                kind: BindingKind::Builtin,
+                name: builtin.to_string(),
+                location: Default::default(),
+                used: None,
+            })
+        }
+        for builtin in MAGIC_GLOBALS {
+            self.add_binding(Binding {
+                kind: BindingKind::Builtin,
+                name: builtin.to_string(),
+                location: Default::default(),
+                used: None,
+            })
+        }
+    }
+
     fn add_binding(&mut self, binding: Binding) {
         let scope = self.scopes.last_mut().expect("No current scope found.");
 
@@ -532,6 +553,7 @@ impl Checker<'_> {
 pub fn check_ast(python_ast: &Suite, settings: &Settings, path: &str) -> Vec<Check> {
     let mut checker = Checker::new(settings);
     checker.push_scope(Scope::new(Module));
+    checker.bind_builtins();
 
     for stmt in python_ast {
         checker.visit_stmt(stmt);

src/lib.rs

@@ -1,3 +1,4 @@
+mod builtins;
 mod cache;
 pub mod check_ast;
 mod check_lines;