Update parser

src/parser/parser.c

@@ -0,0 +1,5 @@
+#include "parser.h"
+
+ResultType(SolsParser, charptr) createSolsParser(SolsTokens* input) {
+    return Error(SolsParser, charptr, "Work in progress");
+}

src/parser/parser.h

@@ -2,5 +2,27 @@
 #define PARSER_H
 
 #include "SolsNode.h"
+#include "../lexer/SolsToken.h"
+#include "../include/error.h"
+
+// Holds information about the parser.
+// .input is lexed tokens, produced by a lexer.
+// .current is the token currently being parsed.
+// .output is the final product of the parser.
+// .currentParent points to the current node being processed
+typedef struct SolsParser {
+    SolsTokens* input;
+    size_t current;
+    SolsNode output;
+    SolsNode* currentParent;
+} SolsParser;
+
+Result(SolsParser, charptr);
+
+// Creates a SolsParser.
+// Returns:
+//    Success: Constructed SolsParser
+//    Failure: char* detailing what went wrong (usually memory failure)
+ResultType(SolsParser, charptr) createSolsParser(SolsTokens* input);
 
 #endif