Examples with BTupleType org.wso2.ballerinalang.compiler.semantics.model.types.BTupleType used on opensource projects

Example 6 with BTupleType

use of org.wso2.ballerinalang.compiler.semantics.model.types.BTupleType in project ballerina by ballerina-lang.

the class SemanticAnalyzer method handleAssignNodeWithVar.

private void handleAssignNodeWithVar(BLangAssignment assignNode) {
    int ignoredCount = 0;
    int createdSymbolCount = 0;
    List<Name> newVariables = new ArrayList<Name>();
    List<BType> expTypes = new ArrayList<>();
    // Check each LHS expression.
    for (int i = 0; i < assignNode.varRefs.size(); i++) {
        BLangExpression varRef = assignNode.varRefs.get(i);
        // If the assignment is declared with "var", then lhs supports only simpleVarRef expressions only.
        if (varRef.getKind() != NodeKind.SIMPLE_VARIABLE_REF) {
            dlog.error(varRef.pos, DiagnosticCode.INVALID_VARIABLE_ASSIGNMENT, varRef);
            expTypes.add(symTable.errType);
            continue;
        }
        // Check variable symbol if exists.
        BLangSimpleVarRef simpleVarRef = (BLangSimpleVarRef) varRef;
        ((BLangVariableReference) varRef).lhsVar = true;
        Name varName = names.fromIdNode(simpleVarRef.variableName);
        if (varName == Names.IGNORE) {
            ignoredCount++;
            simpleVarRef.type = this.symTable.noType;
            expTypes.add(symTable.noType);
            typeChecker.checkExpr(simpleVarRef, env);
            continue;
        }
        BSymbol symbol = symResolver.lookupSymbol(env, varName, SymTag.VARIABLE);
        if (symbol == symTable.notFoundSymbol) {
            createdSymbolCount++;
            newVariables.add(varName);
            expTypes.add(symTable.noType);
        } else {
            expTypes.add(symbol.type);
        }
    }
    if (ignoredCount == assignNode.varRefs.size() || createdSymbolCount == 0) {
        dlog.error(assignNode.pos, DiagnosticCode.NO_NEW_VARIABLES_VAR_ASSIGNMENT);
    }
    // Check RHS expressions with expected type list.
    if (assignNode.getKind() == NodeKind.TUPLE_DESTRUCTURE) {
        expTypes = Lists.of(symTable.noType);
    }
    List<BType> rhsTypes = typeChecker.checkExpr(assignNode.expr, this.env, expTypes);
    if (assignNode.safeAssignment) {
        rhsTypes = Lists.of(handleSafeAssignmentWithVarDeclaration(assignNode.pos, rhsTypes.get(0)));
    }
    if (assignNode.getKind() == NodeKind.TUPLE_DESTRUCTURE) {
        if (rhsTypes.get(0) != symTable.errType && rhsTypes.get(0).tag == TypeTags.TUPLE) {
            BTupleType tupleType = (BTupleType) rhsTypes.get(0);
            rhsTypes = tupleType.tupleTypes;
        } else if (rhsTypes.get(0) != symTable.errType && rhsTypes.get(0).tag != TypeTags.TUPLE) {
            dlog.error(assignNode.pos, DiagnosticCode.INCOMPATIBLE_TYPES_EXP_TUPLE, rhsTypes.get(0));
            rhsTypes = typeChecker.getListWithErrorTypes(assignNode.varRefs.size());
        }
    }
    // visit all lhs expressions
    for (int i = 0; i < assignNode.varRefs.size(); i++) {
        BLangExpression varRef = assignNode.varRefs.get(i);
        if (varRef.getKind() != NodeKind.SIMPLE_VARIABLE_REF) {
            continue;
        }
        BType actualType = rhsTypes.get(i);
        BLangSimpleVarRef simpleVarRef = (BLangSimpleVarRef) varRef;
        Name varName = names.fromIdNode(simpleVarRef.variableName);
        if (newVariables.contains(varName)) {
            // define new variables
            this.symbolEnter.defineVarSymbol(simpleVarRef.pos, Collections.emptySet(), actualType, varName, env);
        }
        typeChecker.checkExpr(simpleVarRef, env);
    }
}

Example 7 with BTupleType

use of org.wso2.ballerinalang.compiler.semantics.model.types.BTupleType in project ballerina by ballerina-lang.

the class SemanticAnalyzer method visit.

public void visit(BLangAssignment assignNode) {
    if (assignNode.isDeclaredWithVar()) {
        handleAssignNodeWithVar(assignNode);
        return;
    }
    // Check each LHS expression.
    List<BType> expTypes = new ArrayList<>();
    for (BLangExpression expr : assignNode.varRefs) {
        // In assignment, lhs supports only simpleVarRef, indexBasedAccess, filedBasedAccess expressions.
        if (expr.getKind() != NodeKind.SIMPLE_VARIABLE_REF && expr.getKind() != NodeKind.INDEX_BASED_ACCESS_EXPR && expr.getKind() != NodeKind.FIELD_BASED_ACCESS_EXPR && expr.getKind() != NodeKind.XML_ATTRIBUTE_ACCESS_EXPR) {
            dlog.error(expr.pos, DiagnosticCode.INVALID_VARIABLE_ASSIGNMENT, expr);
            expTypes.add(symTable.errType);
            continue;
        }
        // Evaluate the variable reference expression.
        BLangVariableReference varRef = (BLangVariableReference) expr;
        varRef.lhsVar = true;
        typeChecker.checkExpr(varRef, env);
        // Check whether we've got an enumerator access expression here.
        if (varRef.getKind() == NodeKind.FIELD_BASED_ACCESS_EXPR && ((BLangFieldBasedAccess) varRef).expr.type.tag == TypeTags.ENUM) {
            dlog.error(varRef.pos, DiagnosticCode.INVALID_VARIABLE_ASSIGNMENT, varRef);
            expTypes.add(symTable.errType);
            continue;
        }
        expTypes.add(varRef.type);
        checkConstantAssignment(varRef);
    }
    if (assignNode.getKind() == NodeKind.TUPLE_DESTRUCTURE) {
        BTupleType tupleType = new BTupleType(expTypes);
        expTypes = Lists.of(tupleType);
    }
    if (!assignNode.safeAssignment) {
        typeChecker.checkExpr(assignNode.expr, this.env, expTypes);
        return;
    }
    // Assume that there is only one variable reference in LHS
    // Continue the validate if this is a safe assignment operator
    handleSafeAssignment(assignNode.pos, assignNode.varRefs.get(0).type, assignNode.expr, this.env);
}

Example 8 with BTupleType

use of org.wso2.ballerinalang.compiler.semantics.model.types.BTupleType in project ballerina by ballerina-lang.

the class IterableCodeDesugar method createIteratorResultVariables.

private List<BLangVariable> createIteratorResultVariables(IterableContext ctx, BLangVariable lastOperationArg, BLangFunction funcNode) {
    List<BLangVariable> resultVariables = new ArrayList<>();
    if (lastOperationArg.type.tag != TypeTags.TUPLE) {
        resultVariables.add(lastOperationArg);
        defineVariable(lastOperationArg, ctx.env.enclPkg.symbol.pkgID, funcNode);
        return resultVariables;
    }
    final List<BType> tupleTypes = ((BTupleType) lastOperationArg.type).tupleTypes;
    int index = 0;
    for (BType type : tupleTypes) {
        String varName = VAR_RESULT_VAL + index++;
        final BLangVariable variable = ASTBuilderUtil.createVariable(funcNode.pos, varName, type);
        resultVariables.add(variable);
        defineVariable(variable, ctx.env.enclPkg.symbol.pkgID, funcNode);
    }
    return resultVariables;
}

Example 9 with BTupleType

use of org.wso2.ballerinalang.compiler.semantics.model.types.BTupleType in project ballerina by ballerina-lang.

the class TypeChecker method visit.

@Override
public void visit(BLangBracedOrTupleExpr bracedOrTupleExpr) {
    // Handle Tuple Expression.
    if (!expTypes.isEmpty() && expTypes.get(0).tag == TypeTags.TUPLE) {
        BTupleType tupleType = (BTupleType) this.expTypes.get(0);
        // Fix this.
        List<BType> expTypes = getListWithErrorTypes(bracedOrTupleExpr.expressions.size());
        if (tupleType.tupleTypes.size() != bracedOrTupleExpr.expressions.size()) {
            dlog.error(bracedOrTupleExpr.pos, DiagnosticCode.SYNTAX_ERROR, "tuple and expression size does not match");
        } else {
            expTypes = tupleType.tupleTypes;
        }
        List<BType> results = new ArrayList<>();
        for (int i = 0; i < bracedOrTupleExpr.expressions.size(); i++) {
            results.add(checkExpr(bracedOrTupleExpr.expressions.get(i), env, Lists.of(expTypes.get(i))).get(0));
        }
        resultTypes = Lists.of(new BTupleType(results));
    } else if (bracedOrTupleExpr.expressions.size() > 1) {
        // This is a tuple.
        List<BType> results = new ArrayList<>();
        for (int i = 0; i < bracedOrTupleExpr.expressions.size(); i++) {
            results.add(checkExpr(bracedOrTupleExpr.expressions.get(i), env, Lists.of(symTable.noType)).get(0));
        }
        resultTypes = Lists.of(new BTupleType(results));
    } else {
        // This is a braced expression.
        bracedOrTupleExpr.isBracedExpr = true;
        final BLangExpression expr = bracedOrTupleExpr.expressions.get(0);
        final BType actualType = checkExpr(expr, env, Lists.of(symTable.noType)).get(0);
        types.setImplicitCastExpr(expr, actualType, expTypes.get(0));
        resultTypes = Lists.of(actualType);
    }
}

Example 10 with BTupleType

use of org.wso2.ballerinalang.compiler.semantics.model.types.BTupleType in project ballerina by ballerina-lang.

the class IterableCodeDesugar method createForeachVariables.

/* Some Utils methods */
private List<BLangVariable> createForeachVariables(IterableContext ctx, BLangVariable firstOperationArg, BLangFunction funcNode) {
    List<BLangVariable> foreachVariables = new ArrayList<>();
    if (firstOperationArg.type.tag != TypeTags.TUPLE) {
        foreachVariables.add(firstOperationArg);
        defineVariable(firstOperationArg, ctx.env.enclPkg.symbol.pkgID, funcNode);
        return foreachVariables;
    }
    final List<BType> tupleTypes = ((BTupleType) firstOperationArg.type).tupleTypes;
    int index = 0;
    for (BType type : tupleTypes) {
        String varName = VAR_FOREACH_VAL + index++;
        final BLangVariable variable = ASTBuilderUtil.createVariable(funcNode.pos, varName, type);
        foreachVariables.add(variable);
        defineVariable(variable, ctx.env.enclPkg.symbol.pkgID, funcNode);
    }
    return foreachVariables;
}