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Use a single type printer for inference errors.

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This way, type variable names will be consistent among all
printed diagnostics.
This commit is contained in:
whitequark 2015-06-04 14:46:43 +03:00
parent c9623a106e
commit 1a08b50f0a
1 changed files with 18 additions and 9 deletions
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27
artiq/py2llvm/typing.py
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@ -135,35 +135,34 @@ class Inferencer(algorithm.Transformer):
try:
typea.unify(typeb)
except types.UnificationError as e:
printer = types.TypePrinter()
if kind == 'generic':
note1 = diagnostic.Diagnostic('note',
"expression of type {typea}",
{"typea": types.TypePrinter().name(typea)},
{"typea": printer.name(typea)},
loca)
elif kind == 'expects':
note1 = diagnostic.Diagnostic('note',
"expression expecting an operand of type {typea}",
{"typea": types.TypePrinter().name(typea)},
{"typea": printer.name(typea)},
loca)
note2 = diagnostic.Diagnostic('note',
"expression of type {typeb}",
{"typeb": types.TypePrinter().name(typeb)},
{"typeb": printer.name(typeb)},
locb)
if e.typea.find() == typea.find() and e.typeb.find() == typeb.find():
diag = diagnostic.Diagnostic('fatal',
"cannot unify {typea} with {typeb}",
{"typea": types.TypePrinter().name(typea),
"typeb": types.TypePrinter().name(typeb)},
{"typea": printer.name(typea), "typeb": printer.name(typeb)},
loca, [locb], notes=[note1, note2])
else: # give more detail
diag = diagnostic.Diagnostic('fatal',
"cannot unify {typea} with {typeb}: {fraga} is incompatible with {fragb}",
{"typea": types.TypePrinter().name(typea),
"typeb": types.TypePrinter().name(typeb),
"fraga": types.TypePrinter().name(e.typea),
"fragb": types.TypePrinter().name(e.typeb),},
{"typea": printer.name(typea), "typeb": printer.name(typeb),
"fraga": printer.name(e.typea), "fragb": printer.name(e.typeb)},
loca, [locb], notes=[note1, note2])
self.engine.process(diag)
@ -230,6 +229,16 @@ class Inferencer(algorithm.Transformer):
node.loc, elt.loc, kind='expects')
return node
def visit_Subscript(self, node):
node = self.generic_visit(node)
node = asttyped.SubscriptT(type=types.TVar(),
value=node.value, slice=node.slice, ctx=node.ctx,
loc=node.loc)
# TODO: support more than just lists
self._unify(types.TList(node.type), node.value.type,
node.loc, node.value.loc, kind='expects')
return node
# Visitors that just unify types
#
def visit_Assign(self, node):