fromSource static method

Implementation

static Safety<RootCitrusSyntax> fromSource(String source) {

    final log = Log(classLocation: RootCitrusSyntax, functionLocation: 'fromSource');

    // 1.
    final scanner = StringScanner<DerivationCitrusSyntax>.fromString(source);

    final stringScannerCompileResult = scanner.compile(LeafCitrusSyntax.result);
    log.add(stringScannerCompileResult);
    // 1. より LeafCitrusSyntaxExceptionA は起こりえないので throw out.
    if (stringScannerCompileResult is! Success<SyntaxScanner<DerivationCitrusSyntax, DerivationCitrusSyntax>, LeafCitrusSyntaxExceptionA>) Result.panic(CitrusSyntaxErrorA(), log);

    final compileUnits = [
        CompileUnit([
            ListSyntaxVerify(ListOfIdentifierable.fromIterable),
            ListSyntaxVerify(ListOfOperatable.fromIterable),
            ListSyntaxVerify(ListOfWhiteSpace.fromIterable),
        ]),
        CompileUnit([
            OneLengthSyntaxVerify(Identifier.result),
            OneLengthSyntaxVerify(Operator.result),
        ]),
        CompileUnit([
            TwoLengthSyntaxVerify(BlockType.new),
            FiveLengthSyntaxVerify(InExpression.new),
            OperatorExpressionVerify(),
            ThreeLengthSyntaxVerify(PeriodExpression.new),
        ]),
        CompileUnit([
            ThreeLengthSyntaxVerify(EndBlock.new),
            ThreeLengthSyntaxVerify(CurlyBind.new),
            FiveLengthSyntaxVerify(StartBlock.new),
        ]),
        CompileUnit([
            TrunkSyntaxVerify(BlockSandwich.fromIterable),
        ]),
    ];

    final syntaxCompileResult = stringScannerCompileResult.wrapped.compile(compileUnits);

    final derivationSyntaxListResult = CitrusSyntaxList(syntaxCompileResult.wrapped);

    final result = RootCitrusSyntax(derivationSyntaxListResult);

    return Safety(result, log);

}