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compiler: disallow op= on mutable lists only (fix #835). 

This only really applies to lists since those use fat pointers.
`x.y += z` is fine.
This commit is contained in:
whitequark 2017-10-02 06:49:13 +00:00
parent cda9719f4b
commit ca254ec55e
1 changed files with 2 additions and 2 deletions
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4
artiq/compiler/validators/escape.py
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@ -330,7 +330,7 @@ class EscapeValidator(algorithm.Visitor):
self.visit_assignment(target, node.value) self.visit_assignment(target, node.value)
def visit_AugAssign(self, node): def visit_AugAssign(self, node):
if builtins.is_allocated(node.target.type): if builtins.is_list(node.target.type):
note = diagnostic.Diagnostic("note", note = diagnostic.Diagnostic("note",
"try using `{lhs} = {lhs} {op} {rhs}` instead", "try using `{lhs} = {lhs} {op} {rhs}` instead",
{"lhs": node.target.loc.source(), {"lhs": node.target.loc.source(),
@ -338,7 +338,7 @@ class EscapeValidator(algorithm.Visitor):
"op": node.op.loc.source()[:-1]}, "op": node.op.loc.source()[:-1]},
node.loc) node.loc)
diag = diagnostic.Diagnostic("error", diag = diagnostic.Diagnostic("error",
"values cannot be mutated in-place", {}, "lists cannot be mutated in-place", {},
node.op.loc, [node.target.loc], node.op.loc, [node.target.loc],
notes=[note]) notes=[note])
self.engine.process(diag) self.engine.process(diag)