diff --git a/.gitignore b/.gitignore
index c7eb1b3..cd76ae7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -526,4 +526,6 @@ FodyWeavers.xsd
 
 doxygen/html
 [Bb][Uu][Ii][Ll][Dd]
-.ccls
\ No newline at end of file
+.ccls
+.vscode
+tests/test_error_out.txt
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0c56225..55ec589 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,6 +63,7 @@ set(ARCHEUS_STD_SOURCES
     src/std/hashtable.c
     src/std/io.c
     src/std/lexer.c
+    src/std/parser.c
     src/std/queue.c
     src/std/stack.c
     src/std/string.c
@@ -127,7 +128,8 @@ if(ARCHEUS_STD_TESTS)
         tests/test.c
 
         #tests/std/vector.c
-        tests/std/lexer.c
+        #tests/std/lexer.c
+        tests/std/parser.c
 
         ${ARCHEUS_STD_SOURCES}
     )
diff --git a/include/arc/std/lexer.h b/include/arc/std/lexer.h
index d5743ec..248a710 100644
--- a/include/arc/std/lexer.h
+++ b/include/arc/std/lexer.h
@@ -41,7 +41,6 @@ typedef uint32_t (* ARC_LexerTokenRule_AutomataFn)(ARC_String **tokenData, ARC_S
 */
 typedef void (* ARC_LexerTokenRule_DestroyAutomataDataFn)(void *automataData);
 
-
 /**
  * @brief a lexer token rule type
 */
@@ -57,7 +56,7 @@ typedef struct ARC_LexerTokenRule {
 /**
  * @brief creates an ARC_Lexer type
  *
- * @param[out] lexer
+ * @param[out] lexer ARC_Lexer to create
 */
 void ARC_Lexer_Create(ARC_Lexer **lexer);
 
diff --git a/include/arc/std/parser.h b/include/arc/std/parser.h
index 37657bf..8a4dd8f 100644
--- a/include/arc/std/parser.h
+++ b/include/arc/std/parser.h
@@ -5,7 +5,10 @@
 extern "C" {
 #endif
 
-#include "arc/std/string.h"
+#include "arc/std/array.h"
+//#include "arc/std/bool.h"
+//#include "arc/std/lexer.h"
+#include <stdint.h>
 
 /**
  * @brief a parser type
@@ -13,17 +16,56 @@ extern "C" {
 typedef struct ARC_Parser ARC_Parser;
 
 /**
- * @brief a parser node
+ * @brief a langue tag type for the parser //TODO: explain this better
 */
-typedef struct ARC_ParserNode ARC_ParserNode;
+typedef struct ARC_ParserLanguageTag {
+  uint32_t tagId;
+
+  uint32_t **tokensOrTags;
+  uint32_t tokensOrTagsSize;
+} ARC_ParserLanguageTag;
+
+/**
+ * @brief a callback function to initialize the lexer the parser uses with rules
+ *
+ * @param lexer the lexer used by the parser that rules should be added to
+*/
+typedef void (* ARC_Parser_InitLexerRulesFn)(ARC_Lexer *lexer);
 
 /**
  * @brief creates an ARC_Parser type
  *
- * @param[out] parser
- * @param[in]  language ..., can be NULL
+ * @TODO: probs want to move the note to another file
+ * @note array of tokens for langauge? like 
+ * ARC_ParserTag tag = {
+ *  VARIABLE_NAME, //tagId
+ *  {
+ *   { 2, CHAR_OR_NUM, VARIABLE_NAME },
+ *   { 1, LAMBDA },
+ *  }, //components
+ *  2 //componentsSize
+ * };
+ *
+ * @param[out] parser           ARC_Parser to create
+ * @param[in]  language         an arry of ARC_ParserLanguageTags defining a langauge
+ * @param[in]  initLexerRulesFn a callback used to initalize the token rules the lexer within the parser will use
 */
-void ARC_Parser_Create(ARC_Parser **parser, ARC_String *language);
+void ARC_Parser_Create(ARC_Parser **parser, ARC_Array *language, ARC_Parser_InitLexerRulesFn initLexerRulesFn);
+
+/**
+ * @brief creates an ARC_Parser type from a string
+ *
+ * @TODO: probs want to move the note to another file
+ * @note the syntax looks like:
+ *       <variable>     -> CHAR <variableName> EOF
+ *       <variableName> -> <charOrNum> <variableName> | LAMBDA
+ *       <charOrNum>    -> CHAR | NUM
+ *
+ * @param[out] parser           ARC_Parser to create
+ * @param[in]  language         an arry of ARC_ParserLanguageTags defining a langauge
+ * @param[in]  initLexerRulesFn a callback used to initalize the token rules the lexer within the parser will use
+*/
+void ARC_Parser_CreateFromString(ARC_Parser **parser, ARC_String *languageString, ARC_Parser_InitLexerRulesFn initLexerRulesFn);
 
 /**
  * @brief destroys an ARC_Parser type
@@ -33,26 +75,18 @@ void ARC_Parser_Create(ARC_Parser **parser, ARC_String *language);
 void ARC_Parser_Destroy(ARC_Parser *parser);
 
 /**
- * @brief sets the definition of the parser, the language itself is parsed and will throw an error if invalid
+ * @brief 
  *
- * @param[in] parser   ARC_Parser to set the language to
- * @param[in] language the language as a string the parser should use
-*/
-void ARC_Parser_SetLanguage(ARC_Parser *parser, ARC_String *language);
-
-/**
- * @brief sets the definition of the parser, the language itself is parsed and will throw an error if invalid
- *
- * @param[in] parser   ARC_Parser to set the language to
- * @param[in] language the language as a string the parser should use
+ * @param[in] parser   
+ * @param[in] language 
 */
 void ARC_Parser_Parse(ARC_Parser *parser, ARC_String *data);
 
 /**
- * @brief sets the definition of the parser, the language itself is parsed and will throw an error if invalid
+ * @brief 
  *
- * @param[in] parser   ARC_Parser to set the language to
- * @param[in] language the language as a string the parser should use
+ * @param[in] parser   
+ * @param[in] language 
 */
 void ARC_Parser_ParseFile(ARC_Parser *parser, ARC_String *path);
 
@@ -60,4 +94,4 @@ void ARC_Parser_ParseFile(ARC_Parser *parser, ARC_String *path);
 }
 #endif
 
-#endif // !ARC_STD_LEXER_H_
+#endif // !ARC_STD_PARSER_H_
diff --git a/include/arc/std/string.h b/include/arc/std/string.h
index fc1b281..56d36eb 100644
--- a/include/arc/std/string.h
+++ b/include/arc/std/string.h
@@ -176,9 +176,18 @@ ARC_Bool ARC_String_SubstringEqualsCString(ARC_String *string, uint64_t offset,
  *
  * @param string string to check
  *
- * @return 1 if alphabetic, 0 if not alphabetic
+ * @return ARC_True if alphabetic, ARC_False if not alphabetic
  */
-uint8_t ARC_String_Alpha(ARC_String *string);
+ARC_Bool ARC_String_IsAlpha(ARC_String *string);
+
+/**
+ * @brief checks if string is made out of only numbers
+ *
+ * @param string string to check
+ *
+ * @return ARC_True if it is numeric, ARC_False if it is not numeric
+ */
+ARC_Bool ARC_String_IsNumeric(ARC_String *string);
 
 /**
  * @brief converst substring from string to uint64_t
diff --git a/src/std/parser.c b/src/std/parser.c
index e69de29..26054cb 100644
--- a/src/std/parser.c
+++ b/src/std/parser.c
@@ -0,0 +1,48 @@
+#include "arc/std/parser.h"
+#include "arc/std/lexer.h"
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct ARC_Parser {
+    ARC_Array language;
+
+    ARC_Lexer *lexer;
+};
+
+void ARC_Parser_Create(ARC_Parser **parser, ARC_Array *language, ARC_Parser_InitLexerRulesFn initLexerRulesFn){
+    *parser = (ARC_Parser *)malloc(sizeof(ARC_Parser));
+
+    //set the language size to 0 and data to NULL in case the language is NULL
+    (*parser)->language.size = 0;
+    (*parser)->language.data = NULL;
+
+    //if the language exists, copy the language
+    if(language != NULL){
+        (*parser)->language.size = language->size;
+        (*parser)->language.data = malloc(sizeof(ARC_ParserLanguageTag) * language->size);
+
+        memcpy((*parser)->language.data, language->data, language->size);
+    }
+
+    //create the lexer
+    ARC_Lexer_Create(&((*parser)->lexer));
+
+    //register instructions to the lexer
+    initLexerRulesFn(((*parser)->lexer));
+}
+
+void ARC_Parser_CreateFromString(ARC_Parser **parser, ARC_String *languageString, ARC_Parser_InitLexerRulesFn initLexerRulesFn){
+}
+
+void ARC_Parser_Destroy(ARC_Parser *parser){
+    free(parser->language.data);
+
+    ARC_Lexer_Destroy(parser->lexer);
+
+    free(parser);
+}
+
+void ARC_Parser_Parse(ARC_Parser *parser, ARC_String *data);
+
+void ARC_Parser_ParseFile(ARC_Parser *parser, ARC_String *path);
diff --git a/src/std/string.c b/src/std/string.c
index 310ccc8..d03e911 100644
--- a/src/std/string.c
+++ b/src/std/string.c
@@ -173,7 +173,8 @@ ARC_Bool ARC_String_SubstringEqualsCString(ARC_String *string, uint64_t offset,
     return ARC_True;
 }
 
-uint8_t ARC_String_Alpha(ARC_String *string){
+//TODO: fix this
+ARC_Bool ARC_String_IsAlpha(ARC_String *string){
     for(uint64_t length = string->length; length; length--){
         if(string->data[length - 1] >= 'a' && string->data[length - 1] <= 'z'){
             continue;
@@ -183,10 +184,20 @@ uint8_t ARC_String_Alpha(ARC_String *string){
             continue;
         }
 
-        return 1;
+        return ARC_True;
     }
 
-    return 0;
+    return ARC_False;
+}
+
+ARC_Bool ARC_String_IsNumeric(ARC_String *string){
+    for(uint64_t index = 0; index < string->length; index++){
+        if(string->data[index] < '0' || string->data[index] > '9'){
+            return ARC_False;
+        }
+    }
+
+    return ARC_True;
 }
 
 uint64_t ARC_String_ToUint64_t(ARC_String *string){
diff --git a/tests/std/parser.c b/tests/std/parser.c
new file mode 100644
index 0000000..8a67599
--- /dev/null
+++ b/tests/std/parser.c
@@ -0,0 +1,45 @@
+#include "../test.h"
+#include "arc/std/parser.h"
+
+#define LAMBDA        0
+#define CHAR          1
+#define NUM           2
+#define CHAR_OR_NUM   3
+#define VARIABLE_NAME 4
+#define VARIABLE      5
+
+ARC_TEST(Lexer_Char_Match){
+    ARC_Parser *parser;
+
+    uint32_t *charOrNumTokens[]      = { (uint32_t[]){ 1, CHAR }, (uint32_t[]){ 1, NUM } };
+    uint32_t *variableNameTags[]     = { (uint32_t[]){ 2, CHAR_OR_NUM, VARIABLE_NAME }, (uint32_t[]){ 1, LAMBDA } };
+    uint32_t *variableTokensOrTags[] = { (uint32_t[]){ 2, CHAR, VARIABLE_NAME } };
+    ARC_ParserLanguageTag testTags[3] = {
+        {
+            CHAR_OR_NUM,     //tagId
+            charOrNumTokens, //tokensOrTags
+            2                //tokenOrTagsSize
+        },
+        {
+            VARIABLE_NAME,    //tagId
+            variableNameTags, //tokensOrTags
+            2                 //tokenOrTagsSize
+        },
+        {
+            VARIABLE,             //tagId
+            variableTokensOrTags, //tokensOrTags
+            1                     //tokenOrTagsSize
+        }
+    };
+
+    ARC_Array languageArray = {
+        3,       //size
+        testTags //data
+    };
+
+    ARC_Parser_Create(&parser, &languageArray);
+
+    ARC_Parser_Destroy(parser);
+
+    ARC_CHECK(1 == 1);
+}