Examples with JSType com.google.javascript.jscomp.newtypes.JSType used on opensource projects

Example 26 with JSType

use of com.google.javascript.jscomp.newtypes.JSType in project closure-compiler by google.

the class NewTypeInference method analyzeCastFwd.

private EnvTypePair analyzeCastFwd(Node expr, TypeEnv inEnv) {
    Node insideCast = expr.getFirstChild();
    EnvTypePair pair = analyzeExprFwd(insideCast, inEnv);
    JSType fromType = pair.type;
    JSType toType = (JSType) expr.getTypeI();
    if (!fromType.isInterfaceInstance() && !toType.isInterfaceInstance() && !JSType.haveCommonSubtype(fromType, toType) && !fromType.hasTypeVariable() && // Allow casts from an empty object literal to any type
    (!insideCast.isObjectLit() || insideCast.hasChildren())) {
        JSError error = JSError.make(expr, INVALID_CAST, fromType.toString(), toType.toString());
        registerMismatchAndWarn(error, fromType, toType);
    } else {
        registerImplicitUses(expr, fromType, toType);
    }
    insideCast.putProp(Node.TYPE_BEFORE_CAST, fromType);
    insideCast.setTypeI(toType);
    pair.type = toType;
    return pair;
}

Example 27 with JSType

use of com.google.javascript.jscomp.newtypes.JSType in project closure-compiler by google.

the class NewTypeInference method analyzeInvocationFwd.

private EnvTypePair analyzeInvocationFwd(Node expr, TypeEnv inEnv, JSType requiredType, JSType specializedType) {
    if (isPropertyTestCall(expr)) {
        return analyzePropertyTestCallFwd(expr, inEnv, specializedType);
    }
    if (expr.isCall() && this.convention.getObjectLiteralCast(expr) != null) {
        return analyzeObjLitCastFwd(this.convention.getObjectLiteralCast(expr), expr, inEnv);
    }
    Node callee = expr.getFirstChild();
    if (isFunctionBind(callee, inEnv, true)) {
        return analyzeFunctionBindFwd(expr, inEnv);
    }
    AssertionFunctionSpec assertionFunctionSpec = assertionFunctionsMap.get(callee.getQualifiedName());
    if (assertionFunctionSpec != null) {
        return analyzeAssertionCall(expr, inEnv, assertionFunctionSpec);
    }
    EnvTypePair calleePair = analyzeExprFwd(callee, inEnv, commonTypes.topFunction());
    TypeEnv envAfterCallee = calleePair.env;
    calleePair = mayWarnAboutNullableReferenceAndTighten(callee, calleePair.type, null, envAfterCallee);
    JSType calleeType = calleePair.type;
    if (calleeType.isBottom() || !calleeType.isSubtypeOf(commonTypes.topFunction())) {
        warnings.add(JSError.make(expr, NOT_CALLABLE, calleeType.toString()));
    }
    FunctionType funType = calleeType.getFunTypeIfSingletonObj();
    if (funType == null || funType.isTopFunction() || funType.isQmarkFunction()) {
        return analyzeInvocationArgsFwdWhenError(expr, envAfterCallee);
    } else if (funType.isLoose()) {
        return analyzeLooseCallNodeFwd(expr, envAfterCallee, requiredType);
    } else if (!isConstructorCall(expr) && funType.isSomeConstructorOrInterface() && (funType.getReturnType().isUnknown() || funType.getReturnType().isUndefined())) {
        warnings.add(JSError.make(expr, CONSTRUCTOR_NOT_CALLABLE, funType.toString()));
        return analyzeInvocationArgsFwdWhenError(expr, envAfterCallee);
    } else if (expr.isNew()) {
        if (!funType.isSomeConstructorOrInterface() || funType.isInterfaceDefinition()) {
            // or as an arbitrarily nested property), don't warn.
            if (callee.isQualifiedName()) {
                String qnameRoot = QualifiedName.fromNode(callee).getLeftmostName();
                if (!this.currentScope.isFormalParamInAnyAncestorScope(qnameRoot)) {
                    warnings.add(JSError.make(expr, NOT_A_CONSTRUCTOR, funType.toString()));
                }
            }
            return analyzeInvocationArgsFwdWhenError(expr, envAfterCallee);
        } else if (funType.isConstructorOfAbstractClass()) {
            warnings.add(JSError.make(expr, CANNOT_INSTANTIATE_ABSTRACT_CLASS, funType.toString()));
            return analyzeInvocationArgsFwdWhenError(expr, envAfterCallee);
        }
    } else if (expr.isTaggedTemplateLit()) {
        funType = checkTaggedFunctionFirstParam(expr.getLastChild(), expr.getFirstChild(), funType);
    }
    if (!isInvocationArgCountCorrectAndWarn(funType, expr, callee)) {
        return analyzeInvocationArgsFwdWhenError(expr, envAfterCallee);
    }
    // save for later
    FunctionType originalFunType = funType;
    if (funType.isGeneric()) {
        Node receiver = callee.isGetProp() ? callee.getFirstChild() : null;
        Node firstArg = expr.getSecondChild();
        ImmutableMap<String, JSType> typeMap = calcTypeInstantiationFwd(expr, receiver, firstArg, funType, envAfterCallee);
        funType = instantiateCalleeMaybeWithTTL(funType, typeMap);
        callee.setTypeI(this.commonTypes.fromFunctionType(funType));
        println("Instantiated function type: ", funType);
    }
    // argTypes collects types of actuals for deferred checks.
    List<JSType> argTypes = new ArrayList<>();
    Node invocationNode = expr.isTaggedTemplateLit() ? expr.getLastChild() : expr;
    Iterable<Node> argIterable = NodeUtil.getInvocationArgsAsIterable(expr);
    TypeEnv tmpEnv = analyzeInvocationArgumentsFwd(invocationNode, argIterable, funType, argTypes, envAfterCallee);
    if (callee.isName()) {
        String calleeName = callee.getString();
        if (this.currentScope.isKnownFunction(calleeName) && !this.currentScope.isExternalFunction(calleeName)) {
            // exactly using their summaries, and don't need deferred checks
            if (this.currentScope.isLocalFunDef(calleeName)) {
                tmpEnv = collectTypesForEscapedVarsFwd(callee, tmpEnv);
            } else if (!originalFunType.isGeneric()) {
                JSType expectedRetType = requiredType;
                println("Updating deferred check with ret: ", expectedRetType, " and args: ", argTypes);
                DeferredCheck dc;
                if (funType.isSomeConstructorOrInterface()) {
                    dc = new DeferredCheck(expr, null, this.currentScope, this.currentScope.getScope(calleeName));
                    deferredChecks.put(expr, dc);
                } else {
                    dc = deferredChecks.get(expr);
                    if (dc != null) {
                        dc.updateReturn(expectedRetType);
                    } else {
                        // The backward analysis of a function is skipped when all
                        // variables, including outer vars, are declared.
                        // So, we check that dc is null iff bwd was skipped.
                        Preconditions.checkState(!this.currentScope.hasUndeclaredFormalsOrOuters(), "No deferred check created in backward direction for %s", expr);
                    }
                }
                if (dc != null) {
                    dc.updateArgTypes(argTypes);
                }
            }
        }
    }
    JSType retType = expr.isNew() ? funType.getThisType() : funType.getReturnType();
    if (retType.isSubtypeOf(requiredType)) {
        retType = retType.specialize(specializedType);
    }
    return new EnvTypePair(tmpEnv, retType);
}

Example 28 with JSType

use of com.google.javascript.jscomp.newtypes.JSType in project closure-compiler by google.

the class NewTypeInference method initEdgeEnvsFwd.

// Initialize the type environments on the CFG edges before the FWD analysis.
private void initEdgeEnvsFwd(TypeEnv entryEnv) {
    envs.clear();
    // For function scopes, add the formal parameters and the free variables
    // from outer scopes to the environment.
    Set<String> nonLocals = new LinkedHashSet<>();
    if (this.currentScope.hasThis()) {
        nonLocals.add(THIS_ID);
    }
    if (this.currentScope.isFunction()) {
        if (this.currentScope.getName() != null) {
            nonLocals.add(this.currentScope.getName());
        }
        nonLocals.addAll(this.currentScope.getOuterVars());
        nonLocals.addAll(this.currentScope.getFormals());
        entryEnv = envPutType(entryEnv, RETVAL_ID, UNDEFINED);
    } else {
        nonLocals.addAll(this.currentScope.getExterns());
    }
    for (String name : nonLocals) {
        JSType declType = this.currentScope.getDeclaredTypeOf(name);
        JSType initType = declType;
        if (initType == null) {
            initType = envGetType(entryEnv, name);
        } else if (this.areTypeVariablesUnknown) {
            initType = initType.substituteGenericsWithUnknown();
        }
        println("Adding non-local ", name, " with decltype: ", declType, " and inittype: ", initType);
        entryEnv = envPutType(entryEnv, name, initType);
    }
    // to the environment.
    for (String local : this.currentScope.getLocals()) {
        if (!this.currentScope.isFunctionNamespace(local)) {
            entryEnv = envPutType(entryEnv, local, UNDEFINED);
        }
    }
    for (String fnName : this.currentScope.getLocalFunDefs()) {
        entryEnv = envPutType(entryEnv, fnName, getSummaryOfLocalFunDef(fnName));
    }
    println("Keeping env: ", entryEnv);
    setOutEnv(this.cfg.getEntry(), entryEnv);
}

Example 29 with JSType

use of com.google.javascript.jscomp.newtypes.JSType in project closure-compiler by google.

the class NewTypeInference method analyzePropLValFwd.

private LValueResultFwd analyzePropLValFwd(Node obj, QualifiedName pname, LValueResultFwd recvLvalue, JSType requiredType, boolean insideQualifiedName) {
    checkArgument(pname.isIdentifier());
    TypeEnv inEnv = recvLvalue.env;
    JSType recvType = recvLvalue.type;
    if (!recvType.isUnion() && !recvType.isSingletonObj()) {
        // The lvalue is a subtype of TOP_OBJECT, but does not contain an object
        // yet, eg, it is ?, truthy, or bottom.
        recvType = TOP_OBJECT.withLoose();
    }
    Node propAccessNode = obj.getParent();
    if (propAccessNode.isGetProp() && propAccessNode.getParent().isAssign() && mayWarnAboutPropCreation(pname, propAccessNode, recvType)) {
        return new LValueResultFwd(inEnv, requiredType, null, null);
    }
    if (!insideQualifiedName && mayWarnAboutConstProp(propAccessNode, recvType, pname)) {
        return new LValueResultFwd(inEnv, requiredType, null, null);
    }
    if (!recvType.hasProp(pname)) {
        // name, or for assignment ops that won't create a new property.
        if (insideQualifiedName || !propAccessNode.getParent().isAssign()) {
            mayWarnAboutInexistentProp(propAccessNode, recvType, pname);
            if (!recvType.isLoose()) {
                return new LValueResultFwd(inEnv, requiredType, null, null);
            }
        }
        if (recvType.isLoose()) {
            // For loose objects, create the inner property if it doesn't exist.
            recvType = recvType.withProperty(pname, UNKNOWN);
            inEnv = updateLvalueTypeInEnv(inEnv, obj, recvLvalue.ptr, recvType);
        }
    }
    if (propAccessNode.isGetElem()) {
        mayWarnAboutStructPropAccess(obj, recvType);
    } else if (propAccessNode.isGetProp()) {
        mayWarnAboutDictPropAccess(obj, recvType);
    }
    QualifiedName setterPname = new QualifiedName(commonTypes.createSetterPropName(pname.getLeftmostName()));
    if (recvType.hasProp(setterPname)) {
        FunctionType funType = recvType.getProp(setterPname).getFunType();
        checkNotNull(funType, "recvType=%s, setterPname=%s", recvType, setterPname);
        JSType formalType = funType.getFormalType(0);
        checkState(!formalType.isBottom());
        return new LValueResultFwd(inEnv, formalType, formalType, null);
    }
    QualifiedName ptr = recvLvalue.ptr == null ? null : QualifiedName.join(recvLvalue.ptr, pname);
    return recvType.mayHaveProp(pname) ? new LValueResultFwd(inEnv, recvType.getProp(pname), recvType.getDeclaredProp(pname), ptr) : new LValueResultFwd(inEnv, UNKNOWN, null, ptr);
}

Example 30 with JSType

use of com.google.javascript.jscomp.newtypes.JSType in project closure-compiler by google.

the class NewTypeInference method analyzeGetElemBwd.

private EnvTypePair analyzeGetElemBwd(Node expr, TypeEnv outEnv, JSType requiredType) {
    Node receiver = expr.getFirstChild();
    Node index = expr.getLastChild();
    JSType reqObjType = pickReqObjType(expr);
    EnvTypePair pair = analyzeExprBwd(receiver, outEnv, reqObjType);
    JSType recvType = pair.type;
    JSType indexType = recvType.getIndexType();
    if (indexType != null) {
        indexType = firstNonBottom(indexType, UNKNOWN);
        pair = analyzeExprBwd(index, pair.env, indexType);
        pair.type = getIndexedTypeOrUnknown(recvType);
        return pair;
    }
    if (index.isString()) {
        return analyzePropAccessBwd(receiver, index.getString(), outEnv, requiredType);
    }
    pair = analyzeExprBwd(index, outEnv);
    pair = analyzeExprBwd(receiver, pair.env, reqObjType);
    pair.type = requiredType;
    return pair;
}