diff options
Diffstat (limited to 'tensorflow/contrib/autograph/core/converter.py')
-rw-r--r-- | tensorflow/contrib/autograph/core/converter.py | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/tensorflow/contrib/autograph/core/converter.py b/tensorflow/contrib/autograph/core/converter.py index 54e6aa0f3b..a93e4a8064 100644 --- a/tensorflow/contrib/autograph/core/converter.py +++ b/tensorflow/contrib/autograph/core/converter.py @@ -64,15 +64,29 @@ from __future__ import division from __future__ import print_function import collections +from enum import Enum + from tensorflow.contrib.autograph.core import config from tensorflow.contrib.autograph.core import naming +from tensorflow.contrib.autograph.pyct import anno +from tensorflow.contrib.autograph.pyct import ast_util +from tensorflow.contrib.autograph.pyct import cfg +from tensorflow.contrib.autograph.pyct import compiler +from tensorflow.contrib.autograph.pyct import qual_names from tensorflow.contrib.autograph.pyct import transformer +from tensorflow.contrib.autograph.pyct.static_analysis import activity +from tensorflow.contrib.autograph.pyct.static_analysis import live_values +from tensorflow.contrib.autograph.pyct.static_analysis import liveness +from tensorflow.contrib.autograph.pyct.static_analysis import reaching_definitions +from tensorflow.contrib.autograph.pyct.static_analysis import type_info # TODO(mdan): These contexts can be refactored into first class objects. # For example, we could define Program and Entity abstractions that hold on # to the actual entity and have conversion methods. +# TODO(mdan): Add a test specific to this converter. + class ProgramContext(object): """ProgramContext keeps track of converting function hierarchies. @@ -197,6 +211,46 @@ class Base(transformer.Base): self._used = False self._ast_depth = 0 + def get_definition_directive(self, node, directive, arg, default): + """Returns the unique directive for a symbol, or a default if none exist. + + See lang/directives.py for details on directives. + + Args: + node: ast.AST + directive: Callable[..., Any] + arg: str + default: Any + + Raises: + ValueError: if conflicting annotations have been found + """ + defs = anno.getanno(node, anno.Static.ORIG_DEFINITIONS, ()) + if not defs: + return default + + # TODO(mdan): Simplify this. + arg_values = [] + for def_ in defs: + if (directive not in def_.directives or + arg not in arg not in def_.directives[directive]): + continue + arg_value = def_.directives[directive][arg] + for prev_value in arg_values: + if not ast_util.matches(arg_value, prev_value): + qn = anno.getanno(node, anno.Basic.QN) + raise ValueError('%s has ambiguous annotations for %s(%s): %s, %s' % + (qn, directive.__name__, arg, + compiler.ast_to_source(arg_value).strip(), + compiler.ast_to_source(prev_value).strip())) + arg_values.append(arg_value) + + if not arg_values: + return default + + arg_value, = arg_values + return arg_value + def visit(self, node): if not self._ast_depth: if self._used: @@ -208,3 +262,69 @@ class Base(transformer.Base): return super(Base, self).visit(node) finally: self._ast_depth -= 1 + + +class AnnotatedDef(reaching_definitions.Definition): + + def __init__(self): + super(AnnotatedDef, self).__init__() + self.directives = {} + + +class AgAnno(Enum): + """Annotation labels specific to AutoGraph. See anno.py.""" + + DIRECTIVES = 'User directives associated with the annotated statement.' + + def __repr__(self): + return self.name + + +def standard_analysis(node, context, is_initial=False): + """Performs a complete static analysis of the given code. + + Args: + node: ast.AST + context: converter.EntityContext + is_initial: bool, whether this is the initial analysis done on the input + source code + + Returns: + ast.AST, same as node, with the static analysis annotations added + """ + # TODO(mdan): Clear static analysis here. + # TODO(mdan): Consider not running all analyses every time. + # TODO(mdan): Don't return a node because it's modified by reference. + graphs = cfg.build(node) + node = qual_names.resolve(node) + node = activity.resolve(node, context.info, None) + node = reaching_definitions.resolve(node, context.info, graphs, AnnotatedDef) + node = liveness.resolve(node, context.info, graphs) + node = live_values.resolve(node, context.info, config.PYTHON_LITERALS) + node = type_info.resolve(node, context.info) + # This second call allows resolving first-order class attributes. + node = live_values.resolve(node, context.info, config.PYTHON_LITERALS) + if is_initial: + anno.dup( + node, + { + anno.Static.DEFINITIONS: anno.Static.ORIG_DEFINITIONS, + }, + ) + return node + + +def apply_(node, context, converter_module): + """Applies a converter to an AST. + + Args: + node: ast.AST + context: converter.EntityContext + converter_module: converter.Base + + Returns: + ast.AST, the result of applying converter to node + """ + node = standard_analysis(node, context) + node = converter_module.transform(node, context) + return node |