def hy_eval(hytree, namespace, module_name, ast_callback=None):
foo = HyObject()
foo.start_line = 0
foo.end_line = 0
foo.start_column = 0
foo.end_column = 0
replace_hy_obj(hytree, foo)
if not isinstance(module_name, string_types):
raise HyTypeError(foo, "Module name must be a string")
_ast, expr = hy_compile(hytree, module_name, get_expr=True)
# Spoof the positions in the generated ast...
for node in ast.walk(_ast):
node.lineno = 1
node.col_offset = 1
for node in ast.walk(expr):
node.lineno = 1
node.col_offset = 1
if ast_callback:
ast_callback(_ast, expr)
if not isinstance(namespace, dict):
raise HyTypeError(foo, "Globals must be a dictionary")
# Two-step eval: eval() the body of the exec call
eval(ast_compile(_ast, "<eval_body>", "exec"), namespace)
# Then eval the expression context and return that
return eval(ast_compile(expr, "<eval>", "eval"), namespace)
def hy_eval(hytree, namespace=None, module_name=None, ast_callback=None):
"""``eval`` evaluates a quoted expression and returns the value. The optional
second and third arguments specify the dictionary of globals to use and the
module name. The globals dictionary defaults to ``(local)`` and the module
name defaults to the name of the current module.
=> (eval '(print "Hello World"))
"Hello World"
If you want to evaluate a string, use ``read-str`` to convert it to a
form first:
=> (eval (read-str "(+ 1 1)"))
2"""
if namespace is None:
frame = inspect.stack()[1][0]
namespace = inspect.getargvalues(frame).locals
if module_name is None:
m = inspect.getmodule(inspect.stack()[1][0])
module_name = '__eval__' if m is None else m.__name__
foo = HyObject()
foo.start_line = 0
foo.end_line = 0
foo.start_column = 0
foo.end_column = 0
replace_hy_obj(hytree, foo)
if not isinstance(module_name, string_types):
raise HyTypeError(foo, "Module name must be a string")
_ast, expr = hy_compile(hytree, module_name, get_expr=True)
# Spoof the positions in the generated ast...
for node in ast.walk(_ast):
node.lineno = 1
node.col_offset = 1
for node in ast.walk(expr):
node.lineno = 1
node.col_offset = 1
if ast_callback:
ast_callback(_ast, expr)
if not isinstance(namespace, dict):
raise HyTypeError(foo, "Globals must be a dictionary")
# Two-step eval: eval() the body of the exec call
eval(ast_compile(_ast, "<eval_body>", "exec"), namespace)
# Then eval the expression context and return that
return eval(ast_compile(expr, "<eval>", "eval"), namespace)