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Example 1 with INSTANCEOF

use of org.apache.groovy.parser.antlr4.GroovyLexer.INSTANCEOF in project groovy by apache.

the class AstBuilder method visitSwitchBlockStatementExpressionGroup.

@Override
@SuppressWarnings("unchecked")
public Tuple3<List<Statement>, Boolean, Boolean> visitSwitchBlockStatementExpressionGroup(SwitchBlockStatementExpressionGroupContext ctx) {
    int labelCnt = ctx.switchExpressionLabel().size();
    List<Token> firstLabelHolder = new ArrayList<>(1);
    final int[] arrowCntHolder = new int[1];
    boolean[] isArrowHolder = new boolean[1];
    boolean[] hasResultStmtHolder = new boolean[1];
    List<Statement> result = (List<Statement>) ctx.switchExpressionLabel().stream().map(e -> (Object) this.visitSwitchExpressionLabel(e)).reduce(new ArrayList<Statement>(4), (r, e) -> {
        List<Statement> statementList = (List<Statement>) r;
        Tuple3<Token, List<Expression>, Integer> tuple = (Tuple3<Token, List<Expression>, Integer>) e;
        boolean isArrow = ARROW == tuple.getV3();
        isArrowHolder[0] = isArrow;
        if (isArrow) {
            if (++arrowCntHolder[0] > 1 && !firstLabelHolder.isEmpty()) {
                throw createParsingFailedException("`case ... ->` does not support falling through cases", firstLabelHolder.get(0));
            }
        }
        boolean isLast = labelCnt - 1 == statementList.size();
        BlockStatement codeBlock = this.visitBlockStatements(ctx.blockStatements());
        List<Statement> statements = codeBlock.getStatements();
        int statementsCnt = statements.size();
        if (0 == statementsCnt) {
            throw createParsingFailedException("`yield` is expected", ctx.blockStatements());
        }
        if (isArrow && statementsCnt > 1) {
            throw createParsingFailedException("Expect only 1 statement, but " + statementsCnt + " statements found", ctx.blockStatements());
        }
        if (!isArrow) {
            boolean[] hasYieldHolder = new boolean[1];
            boolean[] hasThrowHolder = new boolean[1];
            codeBlock.visit(new CodeVisitorSupport() {

                @Override
                public void visitReturnStatement(ReturnStatement statement) {
                    if (isTrue(statement, IS_YIELD_STATEMENT)) {
                        hasYieldHolder[0] = true;
                        return;
                    }
                    super.visitReturnStatement(statement);
                }

                @Override
                public void visitThrowStatement(ThrowStatement statement) {
                    hasThrowHolder[0] = true;
                }
            });
            if (hasYieldHolder[0] || hasThrowHolder[0]) {
                hasResultStmtHolder[0] = true;
            }
        }
        Statement exprOrBlockStatement = statements.get(0);
        if (exprOrBlockStatement instanceof BlockStatement) {
            BlockStatement blockStatement = (BlockStatement) exprOrBlockStatement;
            List<Statement> branchStatementList = blockStatement.getStatements();
            if (1 == branchStatementList.size()) {
                exprOrBlockStatement = branchStatementList.get(0);
            }
        }
        if (!(exprOrBlockStatement instanceof ReturnStatement || exprOrBlockStatement instanceof ThrowStatement)) {
            if (isArrow) {
                MethodCallExpression callClosure = callX(configureAST(closureX(null, exprOrBlockStatement), exprOrBlockStatement), "call");
                callClosure.setImplicitThis(false);
                Expression resultExpr = exprOrBlockStatement instanceof ExpressionStatement ? ((ExpressionStatement) exprOrBlockStatement).getExpression() : callClosure;
                codeBlock = configureAST(createBlockStatement(configureAST(returnS(resultExpr), exprOrBlockStatement)), exprOrBlockStatement);
            }
        }
        switch(tuple.getV1().getType()) {
            case CASE:
                {
                    if (!asBoolean(statementList)) {
                        firstLabelHolder.add(tuple.getV1());
                    }
                    for (int i = 0, n = tuple.getV2().size(); i < n; i++) {
                        Expression expr = tuple.getV2().get(i);
                        statementList.add(configureAST(new CaseStatement(expr, // check whether processing the last label. if yes, block statement should be attached.
                        (isLast && i == n - 1) ? codeBlock : EmptyStatement.INSTANCE), firstLabelHolder.get(0)));
                    }
                    break;
                }
            case DEFAULT:
                {
                    codeBlock.putNodeMetaData(IS_SWITCH_DEFAULT, true);
                    statementList.add(// this.configureAST(codeBlock, tuple.getKey())
                    codeBlock);
                    break;
                }
        }
        return statementList;
    });
    return tuple(result, isArrowHolder[0], hasResultStmtHolder[0]);
}
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Example 2 with INSTANCEOF

use of org.apache.groovy.parser.antlr4.GroovyLexer.INSTANCEOF in project groovy by apache.

the class SemanticPredicates method isFollowingArgumentsOrClosure.

/**
 * Check whether following a method name of command expression.
 * Method name should not end with "2: arguments" and "3: closure"
 *
 * @param context the preceding expression
 */
public static boolean isFollowingArgumentsOrClosure(ExpressionContext context) {
    if (context instanceof PostfixExprAltContext) {
        List<ParseTree> peacChildren = ((PostfixExprAltContext) context).children;
        try {
            ParseTree peacChild = peacChildren.get(0);
            List<ParseTree> pecChildren = ((PostfixExpressionContext) peacChild).children;
            ParseTree pecChild = pecChildren.get(0);
            PathExpressionContext pec = (PathExpressionContext) pecChild;
            int t = pec.t;
            return (2 == t || 3 == t);
        } catch (IndexOutOfBoundsException | ClassCastException e) {
            throw new GroovyBugError("Unexpected structure of expression context: " + context, e);
        }
    }
    return false;
}
Also used : PostfixExpressionContext(org.apache.groovy.parser.antlr4.GroovyParser.PostfixExpressionContext) PostfixExprAltContext(org.apache.groovy.parser.antlr4.GroovyParser.PostfixExprAltContext) GroovyBugError(org.codehaus.groovy.GroovyBugError) PathExpressionContext(org.apache.groovy.parser.antlr4.GroovyParser.PathExpressionContext) ParseTree(org.antlr.v4.runtime.tree.ParseTree)

Example 3 with INSTANCEOF

use of org.apache.groovy.parser.antlr4.GroovyLexer.INSTANCEOF in project groovy by apache.

the class AstBuilder method visitContinueStatement.

@Override
public ContinueStatement visitContinueStatement(final ContinueStatementContext ctx) {
    if (visitingLoopStatementCount == 0) {
        throw createParsingFailedException("continue statement is only allowed inside loops", ctx);
    }
    GroovyParserRuleContext gprc = switchExpressionRuleContextStack.peek();
    if (gprc instanceof SwitchExpressionContext) {
        throw createParsingFailedException("switch expression does not support `continue`", ctx);
    }
    String label = asBoolean(ctx.identifier()) ? this.visitIdentifier(ctx.identifier()) : null;
    return configureAST(new ContinueStatement(label), ctx);
}
Also used : GroovyParserRuleContext(org.apache.groovy.parser.antlr4.GroovyParser.GroovyParserRuleContext) SwitchExpressionContext(org.apache.groovy.parser.antlr4.GroovyLangParser.SwitchExpressionContext) ContinueStatement(org.codehaus.groovy.ast.stmt.ContinueStatement)

Example 4 with INSTANCEOF

use of org.apache.groovy.parser.antlr4.GroovyLexer.INSTANCEOF in project groovy by apache.

the class AstBuilder method visitCommandExpression.

@Override
public Expression visitCommandExpression(final CommandExpressionContext ctx) {
    boolean hasArgumentList = asBoolean(ctx.enhancedArgumentListInPar());
    boolean hasCommandArgument = asBoolean(ctx.commandArgument());
    if ((hasArgumentList || hasCommandArgument) && visitingArrayInitializerCount > 0) {
        // SEE http://groovy.329449.n5.nabble.com/parrot-Command-expressions-in-array-initializer-tt5752273.html
        throw createParsingFailedException("Command chain expression can not be used in array initializer", ctx);
    }
    Expression baseExpr = (Expression) this.visit(ctx.expression());
    if ((hasArgumentList || hasCommandArgument) && !isInsideParentheses(baseExpr) && baseExpr instanceof BinaryExpression && !"[".equals(((BinaryExpression) baseExpr).getOperation().getText())) {
        throw createParsingFailedException("Unexpected input: '" + getOriginalText(ctx.expression()) + "'", ctx.expression());
    }
    MethodCallExpression methodCallExpression = null;
    if (hasArgumentList) {
        Expression arguments = this.visitEnhancedArgumentListInPar(ctx.enhancedArgumentListInPar());
        if (baseExpr instanceof PropertyExpression) {
            // e.g. obj.a 1, 2
            methodCallExpression = configureAST(this.createMethodCallExpression((PropertyExpression) baseExpr, arguments), ctx.expression(), arguments);
        } else if (baseExpr instanceof MethodCallExpression && !isInsideParentheses(baseExpr)) {
            // e.g. m {} a, b  OR  m(...) a, b
            if (asBoolean(arguments)) {
                // The error should never be thrown.
                throw new GroovyBugError("When baseExpr is a instance of MethodCallExpression, which should follow NO argumentList");
            }
            methodCallExpression = (MethodCallExpression) baseExpr;
        } else if (!isInsideParentheses(baseExpr) && (// e.g. m 1, 2
        baseExpr instanceof VariableExpression || // e.g. "$m" 1, 2
        baseExpr instanceof GStringExpression || (baseExpr instanceof ConstantExpression && isTrue(baseExpr, IS_STRING)))) {
            // e.g. "m" 1, 2
            validateInvalidMethodDefinition(baseExpr, arguments);
            methodCallExpression = configureAST(this.createMethodCallExpression(baseExpr, arguments), ctx.expression(), arguments);
        } else {
            // e.g. a[x] b, new A() b, etc.
            methodCallExpression = configureAST(this.createCallMethodCallExpression(baseExpr, arguments), ctx.expression(), arguments);
        }
        methodCallExpression.putNodeMetaData(IS_COMMAND_EXPRESSION, Boolean.TRUE);
        if (!hasCommandArgument) {
            return methodCallExpression;
        }
    }
    if (hasCommandArgument) {
        baseExpr.putNodeMetaData(IS_COMMAND_EXPRESSION, Boolean.TRUE);
    }
    return configureAST((Expression) ctx.commandArgument().stream().map(e -> (Object) e).reduce(methodCallExpression != null ? methodCallExpression : baseExpr, (r, e) -> {
        CommandArgumentContext commandArgumentContext = (CommandArgumentContext) e;
        commandArgumentContext.putNodeMetaData(CMD_EXPRESSION_BASE_EXPR, r);
        return this.visitCommandArgument(commandArgumentContext);
    }), ctx);
}
Also used : CastParExpressionContext(org.apache.groovy.parser.antlr4.GroovyParser.CastParExpressionContext) SUB(org.apache.groovy.parser.antlr4.GroovyParser.SUB) CastExprAltContext(org.apache.groovy.parser.antlr4.GroovyParser.CastExprAltContext) ConditionalExprAltContext(org.apache.groovy.parser.antlr4.GroovyParser.ConditionalExprAltContext) DEFAULT(org.apache.groovy.parser.antlr4.GroovyParser.DEFAULT) IdentifierContext(org.apache.groovy.parser.antlr4.GroovyParser.IdentifierContext) SEALED(org.apache.groovy.parser.antlr4.GroovyParser.SEALED) QualifiedClassNameListContext(org.apache.groovy.parser.antlr4.GroovyParser.QualifiedClassNameListContext) ModifierContext(org.apache.groovy.parser.antlr4.GroovyParser.ModifierContext) ElementValuePairsContext(org.apache.groovy.parser.antlr4.GroovyParser.ElementValuePairsContext) BlockStatementContext(org.apache.groovy.parser.antlr4.GroovyParser.BlockStatementContext) 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Example 5 with INSTANCEOF

use of org.apache.groovy.parser.antlr4.GroovyLexer.INSTANCEOF in project groovy by apache.

the class AstBuilder method visitBreakStatement.

@Override
public BreakStatement visitBreakStatement(final BreakStatementContext ctx) {
    if (0 == visitingLoopStatementCount && 0 == visitingSwitchStatementCount) {
        throw createParsingFailedException("break statement is only allowed inside loops or switches", ctx);
    }
    GroovyParserRuleContext gprc = switchExpressionRuleContextStack.peek();
    if (gprc instanceof SwitchExpressionContext) {
        throw createParsingFailedException("switch expression does not support `break`", ctx);
    }
    String label = asBoolean(ctx.identifier()) ? this.visitIdentifier(ctx.identifier()) : null;
    return configureAST(new BreakStatement(label), ctx);
}
Also used : BreakStatement(org.codehaus.groovy.ast.stmt.BreakStatement) GroovyParserRuleContext(org.apache.groovy.parser.antlr4.GroovyParser.GroovyParserRuleContext) SwitchExpressionContext(org.apache.groovy.parser.antlr4.GroovyLangParser.SwitchExpressionContext)

Aggregations

SwitchExpressionContext (org.apache.groovy.parser.antlr4.GroovyLangParser.SwitchExpressionContext)6 GroovyParserRuleContext (org.apache.groovy.parser.antlr4.GroovyParser.GroovyParserRuleContext)6 Tuple.tuple (groovy.lang.Tuple.tuple)5 Tuple2 (groovy.lang.Tuple2)5 Tuple3 (groovy.lang.Tuple3)5 CompileStatic (groovy.transform.CompileStatic)5 NonSealed (groovy.transform.NonSealed)5 Sealed (groovy.transform.Sealed)5 Trait (groovy.transform.Trait)5 TupleConstructor (groovy.transform.TupleConstructor)5 BufferedReader (java.io.BufferedReader)5 IOException (java.io.IOException)5 ArrayDeque (java.util.ArrayDeque)5 ArrayList (java.util.ArrayList)5 Arrays (java.util.Arrays)5 Collections (java.util.Collections)5 Deque (java.util.Deque)5 Iterator (java.util.Iterator)5 LinkedHashMap (java.util.LinkedHashMap)5 LinkedList (java.util.LinkedList)5