84 lines
1.7 KiB
Python
84 lines
1.7 KiB
Python
from prompt_toolkit.formatted_text import FormattedText
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from prompt_toolkit.formatted_text import HTML
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import enum
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import lamb.tokens as tokens
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class NotAMacro(Exception):
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"""
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Raised when we try to run a non-macro line
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while enforcing macro_only in Runner.run().
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This should be caught and elegantly presented to the user.
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"""
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pass
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class RunStatus:
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"""
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Base class for run status.
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These are returned whenever the runner does something.
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"""
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pass
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class MacroStatus(RunStatus):
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"""
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Returned when a macro is defined.
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Values:
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`was_rewritten`: If true, an old macro was replaced.
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`macro_label`: The name of the macro we just made.
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`macro_expr`: The expr of the macro we just made.
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"""
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def __init__(
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self,
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*,
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was_rewritten: bool,
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macro_label: str,
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macro_expr
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):
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self.was_rewritten = was_rewritten
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self.macro_label = macro_label
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self.macro_expr = macro_expr
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class StopReason(enum.Enum):
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BETA_NORMAL = ("class:text", "β-normal form")
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LOOP_DETECTED = ("class:warn", "loop detected")
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MAX_EXCEEDED = ("class:err", "too many reductions")
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INTERRUPT = ("class:warn", "user interrupt")
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class ReduceStatus(RunStatus):
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"""
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Returned when an expression is reduced.
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Values:
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`reduction_count`: How many reductions were made.
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`stop_reason`: Why we stopped. See `StopReason`.
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"""
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def __init__(
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self,
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*,
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reduction_count: int,
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stop_reason: StopReason,
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result: tokens.LambdaToken
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):
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self.reduction_count = reduction_count
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self.stop_reason = stop_reason
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self.result = result
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class CommandStatus(RunStatus):
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"""
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Returned when a command is executed.
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Doesn't do anything interesting.
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Values:
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`cmd`: The command that was run, without a colon.
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"""
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def __init__(self, *, cmd: str):
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self.cmd = cmd |