javax0.jamal.prog.analyzer.Expression2 Maven / Gradle / Ivy

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Jamal module for Programmatic Extension

There is a newer version: 2.8.1

package javax0.jamal.prog.analyzer;

import javax0.jamal.api.BadSyntax;
import javax0.jamal.prog.commands.Operation;

/**
 * An expression2 is
 *  * expression3 '+' expression2
 * expression3 '-' expression2
 * expression3
 * 
 */

public class Expression2 {
    public static javax0.jamal.prog.commands.Expression analyze(final Lex.List lexes) throws BadSyntax {
        if (lexes.isEmpty()) {
            throw new BadSyntax("Expression is empty");
        }

        var expression3 = Expression3.analyze(lexes);
        if (lexes.is("-") || lexes.is("+")) {
            final var op = lexes.next().text;
            return new Operation(op, expression3, Expression2.analyze(lexes));
        }
        return expression3;
    }
}