M-Labs/nac3-spec
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fixed return bug

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pca006132 2020-12-22 15:20:42 +08:00 committed by pca006132
parent 69cf20cb91
commit c99995adc6
1 changed files with 7 additions and 6 deletions
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13
toy-impl/parse_stmt.py
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@ -133,12 +133,13 @@ def parse_for_stmt(ctx: Context,
if key in used_sym_table:
if value != used_sym_table[key]:
raise CustomError('inconsistent type')
a, b, r = parse_stmts(ctx, sym_table | binding, used_sym_table | binding,
# more sophisticated return analysis is needed...
a, b, _ = parse_stmts(ctx, sym_table | binding, used_sym_table | binding,
return_ty, node.body)
a1, b1, r1 = parse_stmts(ctx, sym_table, used_sym_table | b,
a1, b1, _ = parse_stmts(ctx, sym_table, used_sym_table | b,
return_ty, node.orelse)
defined = {k: a[k] for k in a if k in a1}
return defined, b | b1, r and r1
return defined, b | b1, False
def parse_while_stmt(ctx: Context,
sym_table: dict[str, Type],
@ -149,11 +150,11 @@ def parse_while_stmt(ctx: Context,
if ty != ctx.types['bool']:
raise CustomError('condition must be bool')
# more sophisticated return analysis is needed...
a, b, r = parse_stmts(ctx, sym_table, used_sym_table, return_ty, node.body)
a1, b1, r1 = parse_stmts(ctx, sym_table, used_sym_table | b,
a, b, _ = parse_stmts(ctx, sym_table, used_sym_table, return_ty, node.body)
a1, b1, _ = parse_stmts(ctx, sym_table, used_sym_table | b,
return_ty, node.orelse)
defined = {k: a[k] for k in a if k in a1}
return defined, b | b1, r and r1
return defined, b | b1, False
def parse_return_stmt(ctx: Context,
sym_table: dict[str, Type],