31 lines
936 B
Python
31 lines
936 B
Python
from smnp.ast.node.model import Node
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from smnp.error.syntax import SyntaxException
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def rollup(parser):
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def _rollup(input, parent):
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node = Node(None, (-1, -1))
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elem = parser(input, node)
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while elem is not None:
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node.append(elem)
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elem = parser(input, node)
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return node.children[0] if len(node.children) > 0 else None
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return _rollup
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def assertToken(expected, input):
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if not input.hasCurrent():
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raise SyntaxException(None, f"Expected '{expected}'")
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if expected != input.current().type:
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raise SyntaxException(input.current().pos, f"Expected '{expected}', found '{input.current().value}'")
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def combineParsers(parsers):
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def combinedParser(input, parent):
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for parser in parsers:
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value = parser(input, parent)
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if value is not None:
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return value
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return None
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return combinedParser
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