42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
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import ast
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import sys
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from helper import CustomError
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from type_def import SelfType
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from parse_stmt import parse_stmts
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from primitives import simplest_ctx
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from top_level import parse_top_level
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if len(sys.argv) != 2:
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print('please pass the python script name as argument')
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exit()
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with open(sys.argv[1], 'r') as f:
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source = f.read()
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tree = ast.parse(source, filename=sys.argv[1])
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try:
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ctx, fns = parse_top_level(simplest_ctx, tree)
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for c, name, fn in fns:
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if c is None:
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params, result, _ = ctx.functions[name]
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else:
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params, result, _ = ctx.types[c].methods[name]
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# check if fully annotated all params
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sym_table = {}
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for n, ty in zip(fn.args.args, params):
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if ty is None:
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raise CustomError(
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'Function parameters must be annotated',
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fn)
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if isinstance(ty, SelfType):
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ty = ctx.types[c]
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sym_table[n.arg] = ty
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_, _, returned = parse_stmts(ctx, sym_table, sym_table, result, fn.body)
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if result is not None and not returned:
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raise CustomError('Function may have no return value', fn)
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except CustomError as e:
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print('Error while type checking:')
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print(e.msg)
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