@Nullable
private PyType resolveQualifierType(
@NotNull List<Token<PyElementType>> tokens,
@NotNull PyFile file,
@NotNull TypeEvalContext context,
@NotNull Map<TextRange, PyType> types,
@NotNull Map<PyType, TextRange> fullRanges,
@NotNull Map<PyType, PyImportElement> imports) {
if (tokens.isEmpty()) {
return null;
}
final Token<PyElementType> firstToken = tokens.get(0);
final String firstText = firstToken.getText().toString();
final TextRange firstRange = firstToken.getRange();
final List<RatedResolveResult> resolveResults = file.multiResolveName(firstText);
if (resolveResults.isEmpty()) {
return getImplicitlyResolvedType(tokens, context, types, fullRanges, firstRange);
}
final List<PyType> members = Lists.newArrayList();
for (RatedResolveResult result : resolveResults) {
final PsiElement resolved = result.getElement();
PyType type = null;
if (resolved instanceof PyTargetExpression) {
type =
PyTypingTypeProvider.getTypeFromTargetExpression(
(PyTargetExpression) resolved, context);
}
if (type == null && resolved instanceof PyTypedElement) {
type = context.getType((PyTypedElement) resolved);
}
if (type != null) {
if (!allowResolveToType(type)) {
continue;
}
if (type instanceof PyClassLikeType) {
type = ((PyClassLikeType) type).toInstance();
}
types.put(firstRange, type);
fullRanges.put(type, firstRange);
for (PyFromImportStatement fromImportStatement : file.getFromImports()) {
for (PyImportElement importElement : fromImportStatement.getImportElements()) {
if (firstText.equals(importElement.getVisibleName())) {
imports.put(type, importElement);
}
}
}
for (PyImportElement importElement : file.getImportTargets()) {
if (firstText.equals(importElement.getVisibleName())) {
imports.put(type, importElement);
}
}
}
members.add(type);
}
if (!members.isEmpty()) {
tokens.remove(0);
}
return PyUnionType.union(members);
}
/** @param anchor should never be null or null will be returned */
@NotNull
public static ParseResult parse(@Nullable final PsiElement anchor, @NotNull String type) {
PyPsiUtils.assertValid(anchor);
if (anchor == null) {
return EMPTY_RESULT;
}
final ForwardDeclaration<ParseResult, PyElementType> typeExpr = ForwardDeclaration.create();
final FunctionalParser<ParseResult, PyElementType> classType =
token(IDENTIFIER)
.then(many(op(".").skipThen(token(IDENTIFIER))))
.map(new MakeSimpleType(anchor))
.cached()
.named("class-type");
final FunctionalParser<ParseResult, PyElementType> tupleType =
op("(")
.skipThen(typeExpr)
.then(many(op(",").skipThen(typeExpr)))
.thenSkip(op(")"))
.map(
value -> {
ParseResult result = value.getFirst();
final List<ParseResult> rest = value.getSecond();
if (rest.isEmpty()) {
return result;
}
final List<PyType> types = new ArrayList<>();
types.add(result.getType());
for (ParseResult r : rest) {
result = result.merge(r);
types.add(r.getType());
}
return result.withType(PyTupleType.create(anchor, types));
})
.named("tuple-type");
final FunctionalParser<ParseResult, PyElementType> typeParameter =
token(PARAMETER)
.then(maybe(op("<=").skipThen(typeExpr)))
.map(
value -> {
final Token<PyElementType> token = value.getFirst();
final String name = token.getText().toString();
final TextRange range = token.getRange();
final ParseResult boundResult = value.getSecond();
if (boundResult != null) {
final PyGenericType type1 = new PyGenericType(name, boundResult.getType());
final ParseResult result = new ParseResult(null, type1, range);
return result.merge(boundResult).withType(type1);
}
return new ParseResult(null, new PyGenericType(name, null), range);
})
.named("type-parameter");
final FunctionalParser<ParseResult, PyElementType> simpleExpr =
classType.or(tupleType).or(typeParameter).named("simple-expr");
final FunctionalParser<ParseResult, PyElementType> paramExpr =
classType
.thenSkip(op("["))
.then(typeExpr)
.then(many(op(",").skipThen(typeExpr)))
.thenSkip(op("]"))
.map(
value -> {
final Pair<ParseResult, ParseResult> firstPair = value.getFirst();
final ParseResult first = firstPair.getFirst();
final ParseResult second = firstPair.getSecond();
final List<ParseResult> third = value.getSecond();
final PyType firstType = first.getType();
final List<PyType> typesInBrackets = new ArrayList<>();
typesInBrackets.add(second.getType());
ParseResult result = first;
result = result.merge(second);
for (ParseResult r : third) {
typesInBrackets.add(r.getType());
result = result.merge(r);
}
final List<PyType> elementTypes =
third.isEmpty()
? Collections.singletonList(second.getType())
: typesInBrackets;
final PsiElement resolved = first.getElement();
if (resolved != null) {
final PyType typingType = PyTypingTypeProvider.getType(resolved, elementTypes);
if (typingType != null) {
return result.withType(typingType);
}
}
if (firstType instanceof PyClassType) {
final PyType type1 =
new PyCollectionTypeImpl(
((PyClassType) firstType).getPyClass(), false, elementTypes);
return result.withType(type1);
}
return EMPTY_RESULT;
})
.or(
classType
.thenSkip(op("of"))
.then(simpleExpr)
.map(
value -> {
final ParseResult firstResult = value.getFirst();
final ParseResult secondResult = value.getSecond();
final ParseResult result = firstResult.merge(secondResult);
final PyType firstType = firstResult.getType();
final PyType secondType = secondResult.getType();
if (firstType != null) {
if (firstType instanceof PyClassType && secondType != null) {
return result.withType(
new PyCollectionTypeImpl(
((PyClassType) firstType).getPyClass(),
false,
Collections.singletonList(secondType)));
}
return result.withType(firstType);
}
return EMPTY_RESULT;
}))
.or(
classType
.thenSkip(op("from"))
.then(simpleExpr)
.thenSkip(op("to"))
.then(simpleExpr)
.map(
value -> {
final Pair<ParseResult, ParseResult> firstPair = value.getFirst();
final ParseResult first = firstPair.getFirst();
final ParseResult second = firstPair.getSecond();
final ParseResult third = value.getSecond();
final PyType firstType = first.getType();
if (firstType instanceof PyClassType) {
final List<PyType> elementTypes =
Arrays.asList(second.getType(), third.getType());
final PyCollectionTypeImpl type1 =
new PyCollectionTypeImpl(
((PyClassType) firstType).getPyClass(), false, elementTypes);
return first.merge(second).merge(third).withType(type1);
}
return EMPTY_RESULT;
}))
.named("param-expr");
final FunctionalParser<ParseResult, PyElementType> callableExpr =
op("(")
.skipThen(maybe(typeExpr.then(many(op(",").skipThen(typeExpr)))))
.thenSkip(op(")"))
.thenSkip(op("->"))
.then(typeExpr)
.map(
value -> {
final List<PyCallableParameter> parameters = new ArrayList<>();
final ParseResult returnResult = value.getSecond();
ParseResult result;
final Pair<ParseResult, List<ParseResult>> firstPair = value.getFirst();
if (firstPair != null) {
final ParseResult first = firstPair.getFirst();
final List<ParseResult> second = firstPair.getSecond();
result = first;
parameters.add(new PyCallableParameterImpl(null, first.getType()));
for (ParseResult r : second) {
result = result.merge(r);
parameters.add(new PyCallableParameterImpl(null, r.getType()));
}
result = result.merge(returnResult);
} else {
result = returnResult;
}
return result.withType(
new PyCallableTypeImpl(parameters, returnResult.getType()));
})
.named("callable-expr");
final FunctionalParser<ParseResult, PyElementType> singleExpr =
paramExpr.or(callableExpr).or(simpleExpr).named("single-expr");
final FunctionalParser<ParseResult, PyElementType> unionExpr =
singleExpr
.then(many(op("or").or(op("|")).skipThen(singleExpr)))
.map(
value -> {
final ParseResult first = value.getFirst();
final List<ParseResult> rest = value.getSecond();
if (rest.isEmpty()) {
return first;
}
final List<PyType> types = new ArrayList<>();
types.add(first.getType());
ParseResult result = first;
for (ParseResult r : rest) {
types.add(r.getType());
result = result.merge(r);
}
return result.withType(PyUnionType.union(types));
})
.named("union-expr");
typeExpr.define(unionExpr).named("type-expr");
final FunctionalParser<ParseResult, PyElementType> typeFile =
typeExpr.endOfInput().named("type-file");
try {
return typeFile.parse(tokenize(type));
} catch (ParserException e) {
return EMPTY_RESULT;
}
}