Examples with BLangBlockStmt org.wso2.ballerinalang.compiler.tree.statements.BLangBlockStmt used on opensource projects

Example 41 with BLangBlockStmt

use of org.wso2.ballerinalang.compiler.tree.statements.BLangBlockStmt in project ballerina by ballerina-lang.

the class ASTBuilderUtil method createReturnStmt.

static BLangReturn createReturnStmt(DiagnosticPos pos, BLangBlockStmt target) {
    final BLangReturn returnStmt = (BLangReturn) TreeBuilder.createReturnNode();
    returnStmt.pos = pos;
    target.addStatement(returnStmt);
    return returnStmt;
}

Example 42 with BLangBlockStmt

use of org.wso2.ballerinalang.compiler.tree.statements.BLangBlockStmt in project ballerina by ballerina-lang.

the class AnnotationDesugar method createAnnotationMapEntryVar.

private BLangVariable createAnnotationMapEntryVar(String key, BLangVariable annotationMapVar, BLangBlockStmt target, BSymbol parentSymbol) {
    // create: map key = {};
    final BLangRecordLiteral recordLiteralNode = ASTBuilderUtil.createEmptyRecordLiteral(target.pos, symTable.mapType);
    BLangVariable entryVariable = ASTBuilderUtil.createVariable(target.pos, key, recordLiteralNode.type);
    entryVariable.expr = recordLiteralNode;
    ASTBuilderUtil.defineVariable(entryVariable, parentSymbol, names);
    ASTBuilderUtil.createVariableDefStmt(target.pos, target).var = entryVariable;
    // create: annotationMapVar["key"] = key;
    BLangAssignment assignmentStmt = ASTBuilderUtil.createAssignmentStmt(target.pos, target);
    assignmentStmt.expr = ASTBuilderUtil.createVariableRef(target.pos, entryVariable.symbol);
    BLangIndexBasedAccess indexAccessNode = (BLangIndexBasedAccess) TreeBuilder.createIndexBasedAccessNode();
    indexAccessNode.pos = target.pos;
    indexAccessNode.indexExpr = ASTBuilderUtil.createLiteral(target.pos, symTable.stringType, key);
    indexAccessNode.expr = ASTBuilderUtil.createVariableRef(target.pos, annotationMapVar.symbol);
    indexAccessNode.type = recordLiteralNode.type;
    assignmentStmt.varRefs.add(indexAccessNode);
    return entryVariable;
}

Example 43 with BLangBlockStmt

use of org.wso2.ballerinalang.compiler.tree.statements.BLangBlockStmt in project ballerina by ballerina-lang.

the class AnnotationDesugar method initAnnotation.

private void initAnnotation(BLangAnnotationAttachment attachment, BLangVariable annotationMapEntryVar, BLangBlockStmt target, BSymbol parentSymbol, int index) {
    BLangVariable annotationVar = null;
    if (attachment.annotationSymbol.attachedType != null) {
        // create: AttachedType annotationVar = { annotation-expression }
        annotationVar = ASTBuilderUtil.createVariable(attachment.pos, attachment.annotationName.value, attachment.annotationSymbol.attachedType.type);
        annotationVar.expr = attachment.expr;
        ASTBuilderUtil.defineVariable(annotationVar, parentSymbol, names);
        ASTBuilderUtil.createVariableDefStmt(attachment.pos, target).var = annotationVar;
    }
    // create: annotationMapEntryVar["name$index"] = annotationVar;
    BLangAssignment assignmentStmt = ASTBuilderUtil.createAssignmentStmt(target.pos, target);
    if (annotationVar != null) {
        assignmentStmt.expr = ASTBuilderUtil.createVariableRef(target.pos, annotationVar.symbol);
    } else {
        assignmentStmt.expr = ASTBuilderUtil.createLiteral(target.pos, symTable.nullType, null);
    }
    BLangIndexBasedAccess indexAccessNode = (BLangIndexBasedAccess) TreeBuilder.createIndexBasedAccessNode();
    indexAccessNode.pos = target.pos;
    indexAccessNode.indexExpr = ASTBuilderUtil.createLiteral(target.pos, symTable.stringType, attachment.annotationSymbol.bvmAlias() + "$" + index);
    indexAccessNode.expr = ASTBuilderUtil.createVariableRef(target.pos, annotationMapEntryVar.symbol);
    indexAccessNode.type = annotationMapEntryVar.symbol.type;
    assignmentStmt.varRefs.add(indexAccessNode);
}

Example 44 with BLangBlockStmt

use of org.wso2.ballerinalang.compiler.tree.statements.BLangBlockStmt in project ballerina by ballerina-lang.

the class Desugar method getSafeAssignErrorPattern.

private BLangMatchStmtPatternClause getSafeAssignErrorPattern(DiagnosticPos pos, BSymbol invokableSymbol) {
    // From here onwards we assume that this function has only one return type
    // Owner of the variable symbol must be an invokable symbol
    boolean noRetParams = ((BInvokableType) invokableSymbol.type).retTypes.isEmpty();
    boolean returnErrorType = false;
    if (!noRetParams) {
        BType retType = ((BInvokableType) invokableSymbol.type).retTypes.get(0);
        Set<BType> returnTypeSet = retType.tag == TypeTags.UNION ? ((BUnionType) retType).memberTypes : new HashSet<BType>() {

            {
                add(retType);
            }
        };
        returnErrorType = returnTypeSet.stream().anyMatch(type -> types.isAssignable(type, symTable.errStructType));
    }
    // Create the pattern to match the error type
    // 1) Create the pattern variable
    String patternFailureCaseVarName = GEN_VAR_PREFIX.value + "t_failure";
    BLangVariable patternFailureCaseVar = ASTBuilderUtil.createVariable(pos, patternFailureCaseVarName, symTable.errStructType, null, new BVarSymbol(0, names.fromString(patternFailureCaseVarName), this.env.scope.owner.pkgID, symTable.errStructType, this.env.scope.owner));
    // 2) Create the pattern block
    BLangVariableReference patternFailureCaseVarRef = ASTBuilderUtil.createVariableRef(pos, patternFailureCaseVar.symbol);
    BLangBlockStmt patternBlockFailureCase = (BLangBlockStmt) TreeBuilder.createBlockNode();
    patternBlockFailureCase.pos = pos;
    if (noRetParams || !returnErrorType) {
        // throw e
        BLangThrow throwStmt = (BLangThrow) TreeBuilder.createThrowNode();
        throwStmt.pos = pos;
        throwStmt.expr = patternFailureCaseVarRef;
        patternBlockFailureCase.stmts.add(throwStmt);
    } else {
        // return e;
        BLangReturn returnStmt = (BLangReturn) TreeBuilder.createReturnNode();
        returnStmt.pos = pos;
        returnStmt.exprs = new ArrayList<BLangExpression>() {

            {
                add(patternFailureCaseVarRef);
            }
        };
        patternBlockFailureCase.stmts.add(returnStmt);
    }
    return ASTBuilderUtil.createMatchStatementPattern(pos, patternFailureCaseVar, patternBlockFailureCase);
}

Example 45 with BLangBlockStmt

use of org.wso2.ballerinalang.compiler.tree.statements.BLangBlockStmt in project ballerina by ballerina-lang.

the class Desugar method visit.

@Override
public void visit(BLangVariableDef varDefNode) {
    if (varDefNode.var.expr instanceof BLangRecordLiteral && ((BLangRecordLiteral) varDefNode.var.expr).type.tag == TypeTags.STREAM) {
        ((BLangRecordLiteral) varDefNode.var.expr).name = varDefNode.var.name;
    }
    varDefNode.var = rewrite(varDefNode.var, env);
    BLangVariable varNode = varDefNode.var;
    // Generate default init expression, if rhs expr is null
    if (varNode.expr == null) {
        varNode.expr = getInitExpr(varNode.type);
    }
    if (!varNode.safeAssignment) {
        result = varDefNode;
        return;
    }
    // Desugar the =? operator with the match statement
    // 
    // e.g.
    // var f =? openFile("/tmp/foo.txt"); // openFile: () -> (File | error)
    // 
    // {
    // File f;
    // match openFile("/tmp/foo.txt") {
    // File _$_f1 => f = _$_f1;
    // error e => throw e | return e
    // }
    // }
    // Create the pattern to match the success case
    BLangMatchStmtPatternClause patternSuccessCase = getSafeAssignSuccessPattern(varNode.pos, varNode.symbol.type, true, varNode.symbol, null);
    BLangMatchStmtPatternClause patternErrorCase = getSafeAssignErrorPattern(varNode.pos, varNode.symbol.owner);
    // Create the match statement
    BLangMatch matchStmt = ASTBuilderUtil.createMatchStatement(varNode.expr.pos, varNode.expr, new ArrayList<BLangMatchStmtPatternClause>() {

        {
            add(patternSuccessCase);
            add(patternErrorCase);
        }
    });
    // var f =? foo() -> var f;
    varNode.expr = null;
    varNode.safeAssignment = false;
    BLangBlockStmt safeAssignmentBlock = ASTBuilderUtil.createBlockStmt(varDefNode.pos, new ArrayList<BLangStatement>() {

        {
            add(varDefNode);
            add(matchStmt);
        }
    });
    result = rewrite(safeAssignmentBlock, this.env);
}