Examples with CommandExpressionContext org.apache.groovy.parser.antlr4.GroovyParser.CommandExpressionContext used on opensource projects

Example 1 with CommandExpressionContext

use of org.apache.groovy.parser.antlr4.GroovyParser.CommandExpressionContext 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);
}