DeclarationParser.java - The DeclarationParser class is res…

/src/org/ooc/frontend/parser/DeclarationParser.java

http://github.com/nddrylliog/ooc · Java · 37 lines · 27 code · 10 blank · 0 comment · 10 complexity · f18a970ec40f20c7bfee2157f493b0ac MD5 · raw file


package org.ooc.frontend.parser;

import org.ooc.frontend.model.ClassDecl;
import org.ooc.frontend.model.CoverDecl;
import org.ooc.frontend.model.Declaration;
import org.ooc.frontend.model.FunctionDecl;
import org.ooc.frontend.model.Module;
import org.ooc.frontend.model.OpDecl;
import org.ooc.frontend.model.VariableDecl;
import org.ooc.frontend.model.tokens.TokenReader;
import org.ubi.SourceReader;

public class DeclarationParser {

	public static Declaration parse(Module module, SourceReader sReader, TokenReader reader) {
		int mark = reader.mark();
		
		VariableDecl varDecl = VariableDeclParser.parseSingle(module, sReader, reader);
		if(varDecl != null) return varDecl;
		
		OpDecl opDecl = OpDeclParser.parse(module, sReader, reader);
		if(opDecl != null) return opDecl;
		
		FunctionDecl funcDecl = FunctionDeclParser.parse(module, sReader, reader, false);
		if(funcDecl != null) return funcDecl;
		
		ClassDecl classDecl = ClassDeclParser.parse(module, sReader, reader);
		if(classDecl != null) return classDecl;
		
		CoverDecl coverDecl = CoverDeclParser.parse(module, sReader, reader);
		if(coverDecl != null) return coverDecl;
		
		reader.reset(mark);
		return null;
	}
	
}

Summary ✨

The DeclarationParser class is responsible for parsing a module’s declarations, such as variables, operators, functions, classes, and covers. It uses different parsers to parse each type of declaration and returns the parsed declaration if successful, otherwise resets the reader and returns null. The parser attempts to parse each type of declaration in order until one succeeds or all have failed.

Alerts (1)

'return null;' Returning null forces callers to perform null checks, risking NullPointerException. Consider using Optional<T> (Java 8+), throwing an exception, or returning a Null Object/empty collection instead.
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