9bbeb35c08
Fixed an issue that prevented the password reset tokens from working. Added email templates for password reset success and new account creation. Added more dynamic email template support.
47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
"""The optimizer tries to constant fold expressions and modify the AST
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in place so that it should be faster to evaluate.
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Because the AST does not contain all the scoping information and the
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compiler has to find that out, we cannot do all the optimizations we
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want. For example, loop unrolling doesn't work because unrolled loops
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would have a different scope. The solution would be a second syntax tree
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that stored the scoping rules.
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"""
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import typing as t
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from . import nodes
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from .visitor import NodeTransformer
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if t.TYPE_CHECKING:
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from .environment import Environment
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def optimize(node: nodes.Node, environment: "Environment") -> nodes.Node:
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"""The context hint can be used to perform an static optimization
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based on the context given."""
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optimizer = Optimizer(environment)
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return t.cast(nodes.Node, optimizer.visit(node))
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class Optimizer(NodeTransformer):
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def __init__(self, environment: "t.Optional[Environment]") -> None:
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self.environment = environment
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def generic_visit(
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self, node: nodes.Node, *args: t.Any, **kwargs: t.Any
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) -> nodes.Node:
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node = super().generic_visit(node, *args, **kwargs)
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# Do constant folding. Some other nodes besides Expr have
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# as_const, but folding them causes errors later on.
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if isinstance(node, nodes.Expr):
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try:
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return nodes.Const.from_untrusted(
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node.as_const(args[0] if args else None),
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lineno=node.lineno,
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environment=self.environment,
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)
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except nodes.Impossible:
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pass
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return node
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