99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright 2017 the authors.
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# This file is part of Hy, which is free software licensed under the Expat
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# license. See the LICENSE.
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import traceback
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from clint.textui import colored
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class HyError(Exception):
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"""
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Generic Hy error. All internal Exceptions will be subclassed from this
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Exception.
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"""
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pass
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class HyCompileError(HyError):
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def __init__(self, exception, traceback=None):
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self.exception = exception
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self.traceback = traceback
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def __str__(self):
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if isinstance(self.exception, HyTypeError):
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return str(self.exception)
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if self.traceback:
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tb = "".join(traceback.format_tb(self.traceback)).strip()
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else:
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tb = "No traceback available. 😟"
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return("Internal Compiler Bug 😱\n⤷ %s: %s\nCompilation traceback:\n%s"
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% (self.exception.__class__.__name__,
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self.exception, tb))
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class HyTypeError(TypeError):
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def __init__(self, expression, message):
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super(HyTypeError, self).__init__(message)
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self.expression = expression
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self.message = message
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self.source = None
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self.filename = None
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def __str__(self):
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line = self.expression.start_line
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start = self.expression.start_column
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end = self.expression.end_column
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source = []
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if self.source is not None:
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source = self.source.split("\n")[line-1:self.expression.end_line]
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if line == self.expression.end_line:
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length = end - start
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else:
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length = len(source[0]) - start
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result = ""
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result += ' File "%s", line %d, column %d\n\n' % (self.filename,
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line,
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start)
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if len(source) == 1:
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result += ' %s\n' % colored.red(source[0])
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result += ' %s%s\n' % (' '*(start-1),
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colored.green('^' + '-'*(length-1) + '^'))
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if len(source) > 1:
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result += ' %s\n' % colored.red(source[0])
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result += ' %s%s\n' % (' '*(start-1),
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colored.green('^' + '-'*length))
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if len(source) > 2: # write the middle lines
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for line in source[1:-1]:
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result += ' %s\n' % colored.red("".join(line))
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result += ' %s\n' % colored.green("-"*len(line))
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# write the last line
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result += ' %s\n' % colored.red("".join(source[-1]))
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result += ' %s\n' % colored.green('-'*(end-1) + '^')
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result += colored.yellow("%s: %s\n\n" %
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(self.__class__.__name__,
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self.message.encode('utf-8')))
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return result
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class HyMacroExpansionError(HyTypeError):
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pass
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class HyIOError(HyError, IOError):
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"""
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Trivial subclass of IOError and HyError, to distinguish between
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IOErrors raised by Hy itself as opposed to Hy programs.
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"""
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pass
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