feat(parser): implementing all redirection types -- WIP

src/parser/grammar.c

@@ -5,6 +5,7 @@
 #include <stdlib.h>
 
 #include "grammar_basic.h"
+#include "../lexer/lexer.h"
 
 // === Static variables
 
@@ -84,11 +85,30 @@ static void add_first_redir(enum rule rule)
     add_first(rule, TOKEN_REDIR_LEFT_RIGHT);
     add_first(rule, TOKEN_REDIR_DOUBLE_RIGHT);
     add_first(rule, TOKEN_REDIR_LEFT_AMP);
+    add_first(rule, TOKEN_REDIR_RIGHT_AMP);
     add_first(rule, TOKEN_REDIR_RIGHT_PIPE);
 }
 
 // === Functions
 
+bool is_token_redir(struct token *token)
+{
+    switch (token->type)
+    {
+        case TOKEN_REDIR_LEFT:
+        case TOKEN_REDIR_RIGHT:
+        case TOKEN_REDIR_LEFT_RIGHT:
+        case TOKEN_REDIR_DOUBLE_RIGHT:
+        case TOKEN_REDIR_LEFT_AMP:
+        case TOKEN_REDIR_RIGHT_AMP:
+        case TOKEN_REDIR_RIGHT_PIPE:
+            return true;
+        default:
+            return false;
+    }
+}
+
+
 bool grammar_init(void)
 {
     // Initialize the firsts map
@@ -196,7 +216,9 @@ struct ast *parse_input(struct lexer_context *ctx)
     if (token->type == TOKEN_NEWLINE || token->type == TOKEN_EOF)
     {
         if (token->type == TOKEN_NEWLINE)
+        {
             POP_TOKEN();
+        }
         return ast;
     }
 

src/parser/grammar.h

@@ -50,6 +50,10 @@ struct firsts_list {
 
 // === Functions
 
+/* @brief: returns true if token has a type redirection (not pipe or IONUMBER).
+ */
+bool is_token_redir(struct token *token);
+
 /*
  * @brief Initializes the grammar submodule
  * @return PARSER_INIT_SUCCESS on success PARSER_INIT_ERROR on error

src/parser/grammar_basic.c

@@ -1,3 +1,5 @@
+#define _POSIX_C_SOURCE 200809L
+
 #include "grammar_basic.h"
 
 #include <stdio.h>
@@ -198,7 +200,7 @@ struct ast *parse_element(struct lexer_context *ctx)
         token = POP_TOKEN();
         return ast_create_word(token->data);
     }
-    else if (token->type == TOKEN_IONUMBER || token->type == TOKEN_REDIRECTION)
+    else if (token->type == TOKEN_IONUMBER || is_token_redir(token))
     {
         return parse_redirection(ctx);
     }