Made the tests pass with a not very pretty modification of the LINE_CONTINUATION lexer rule.

Author: MDoerner

Rubberduck.Parsing/Grammar/VBALexer.g4

@@ -301,9 +301,14 @@ UNDERSCORE : '_';
 WS : [ \t];
 GUIDLITERAL : '{' [0-9A-F]+ '-' [0-9A-F]+ '-' [0-9A-F]+ '-' [0-9A-F]+ '-' [0-9A-F]+ '}';
 IDENTIFIER :  ~[[\](){}\r\n\t.,'"|!@#$%^&*\-+:=; 0-9-/\\-] ~[[\](){}\r\n\t.,'"|!@#$%^&*\-+:=; -]*;
-LINE_CONTINUATION : [ \t]+ UNDERSCORE [ \t]* '\r'? '\n';
+LINE_CONTINUATION : [ \t]+ UNDERSCORE [ \t]* '\r'? '\n' WS_NOT_FOLLOWED_BY_LINE_CONTINUATION*;
 // The following rule is needed in order to capture hex literals without format prefixes which start with a digit. Needed for VBForm resources.
-BARE_HEX_LITERAL : [0-9] [0-9a-fA-F]*;
+BARE_HEX_LITERAL : [0-9] [0-9a-fA-F]*; 
+fragment WS_NOT_FOLLOWED_BY_LINE_CONTINUATION : [ \t] {(char)_input.La(1) != '_' 
+                                                        || ((char)_input.La(2) != '\r' 
+														    && (char)_input.La(2) != '\n' 
+															&& (char)_input.La(2) != '\t' 
+															&& (char)_input.La(2) != ' ')}?;
 fragment LETTER : [a-zA-Z_äöüÄÖÜ];
 fragment DIGIT : [0-9];
 fragment LETTERORDIGIT : [a-zA-Z0-9_äöüÄÖÜ];

Rubberduck.Parsing/Grammar/VBAParser.g4

@@ -601,7 +601,7 @@ complexType :
 fieldLength : MULT whiteSpace? (numberLiteral | identifierValue);
 
 //Statement labels can only appear at the start of a line.
-statementLabelDefinition : {_input.La(-1) == NEWLINE}? (combinedLabels | identifierStatementLabel | standaloneLineNumberLabel);
+statementLabelDefinition : {_input.La(-1) == NEWLINE || _input.La(-1) == LINE_CONTINUATION}? (combinedLabels | identifierStatementLabel | standaloneLineNumberLabel);
 identifierStatementLabel : legalLabelIdentifier whiteSpace? COLON;
 standaloneLineNumberLabel : 
     lineNumberLabel whiteSpace? COLON