PowerShell: keep the KEYWORD type

This commit reverts the keyword type that was removed in a previous PR
and adds the attribute keywordType to tokenInfo.

Close universal-ctags#3479

parsers/powershell.c

@@ -57,8 +57,7 @@ typedef enum eTokenType {
 	TOKEN_SEMICOLON,
 	TOKEN_COLON,
 	TOKEN_COMMA,
-	TOKEN_KEYWORD_FUNCTION,
-	TOKEN_KEYWORD_CLASS,
+	TOKEN_KEYWORD,
 	TOKEN_OPEN_PAREN,
 	TOKEN_OPERATOR,
 	TOKEN_IDENTIFIER,
@@ -72,8 +71,15 @@ typedef enum eTokenType {
 	TOKEN_VARIABLE
 } tokenType;
 
+typedef enum eTokenKeywordType {
+	KEYWORD_UNDEFINED,
+	KEYWORD_FUNCTION,
+	KEYWORD_CLASS,
+} tokenKeywordType;
+
 typedef struct {
 	tokenType		type;
+	tokenKeywordType	keywordType;
 	vString *		string;
 	vString *		scope;
 	unsigned long	lineNumber;
@@ -163,6 +169,7 @@ static tokenInfo *newToken (void)
 	tokenInfo *const token = xMalloc (1, tokenInfo);
 
 	token->type			= TOKEN_UNDEFINED;
+	token->keywordType	= KEYWORD_UNDEFINED;
 	token->string		= vStringNew ();
 	token->scope		= vStringNew ();
 	token->lineNumber   = getInputLineNumber ();
@@ -377,10 +384,14 @@ static void readToken (tokenInfo *const token)
 			else
 			{
 				parseIdentifier (token->string, c);
-				if (isTokenFunction (token->string))
-					token->type = TOKEN_KEYWORD_FUNCTION;
-				else if (isTokenClass (token->string))
-					token->type = TOKEN_KEYWORD_CLASS;
+				if (isTokenFunction (token->string)) {
+					token->type = TOKEN_KEYWORD;
+					token->keywordType = KEYWORD_FUNCTION;
+				}
+				else if (isTokenClass (token->string)) {
+					token->type = TOKEN_KEYWORD;
+					token->keywordType = KEYWORD_CLASS;
+				}
 				else
 					token->type = TOKEN_IDENTIFIER;
 			}
@@ -619,12 +630,19 @@ static void enterScope (tokenInfo *const parentToken,
 				enterScope (token, NULL, KIND_GHOST_INDEX);
 				break;
 
-			case TOKEN_KEYWORD_FUNCTION:
-				readNext = parseFunction (token);
-				break;
+			case TOKEN_KEYWORD:
+				switch (token->keywordType)
+				{
+					case KEYWORD_FUNCTION:
+						readNext = parseFunction (token);
+						break;
+
+					case KEYWORD_CLASS:
+						readNext = parseClass (token);
+						break;
 
-			case TOKEN_KEYWORD_CLASS:
-				readNext = parseClass (token);
+					default: break;
+				}
 				break;
 
 			case TOKEN_VARIABLE: