1 files changed, 29 insertions, 1 deletions

diff --git a/src/parser.c b/src/parser.c
index 45b4412..be3461c 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -1,10 +1,12 @@
 #include "../include/parser.h"
 #include "../include/bytecode.h"
+#include "../include/std/hash_map.h"
 #include <stdio.h>
 
 typedef struct {
     TslTokenizer tokenizer;
     TslBytecodeWriter bytecode_writer;
+    TslHashMap variables;
 } TslParser;
 
 static int tsl_parser_parse_rhs(TslParser *self);
@@ -13,6 +15,23 @@ static int tsl_parser_parse_expressions(TslParser *self, TslToken end_token);
 static void tsl_parser_init(TslParser *self, const char *code, size_t code_size) {
     tsl_tokenizer_init(&self->tokenizer, code, code_size);
     tsl_bytecode_writer_init(&self->bytecode_writer);
+    tsl_hash_map_init(&self->variables);
+}
+
+static void tsl_parser_deinit(TslParser *self) {
+    tsl_bytecode_writer_deinit(&self->bytecode_writer);
+    tsl_hash_map_deinit(&self->variables);
+}
+
+static uint64_t hash_string_view(const void *data, size_t size) {
+    uint64_t result = 0xdec05eba;
+    const uint8_t *p = data;
+    while(size) {
+        result = ((result << 5) + result) + *p;
+        ++p;
+        --size;
+    }
+    return result;
 }
 
 static int tsl_parser_parse_map(TslParser *self) {
@@ -280,6 +299,12 @@ int tsl_parser_parse_expressions(TslParser *self, TslToken end_token) {
             TslStringView identifier = self->tokenizer.identifier;
             printf("identifier: %.*s\n", identifier.size, identifier.data);
             if(tsl_tokenizer_peek(&self->tokenizer) == TSL_TOKEN_EQUAL) {
+                void *existing_variable = tsl_hash_map_get(&self->variables, &identifier, hash_string_view);
+                if(!existing_variable) {
+                    fprintf(stderr, "Variable declaration: %.*s\n", identifier.size, identifier.data);
+                    if(!tsl_hash_map_insert(&self->variables, &identifier, "a", 1, hash_string_view))
+                        return -1;
+                }
                 tsl_tokenizer_consume_peek(&self->tokenizer); /* consume previous TSL_TOKEN_EQUAL */
                 if(tsl_parser_parse_rhs(self) != 0)
                     return -1;
@@ -298,7 +323,10 @@ int tsl_parser_parse_expressions(TslParser *self, TslToken end_token) {
 }
 
 int tsl_parse(const char *code, size_t code_size) {
+    int result;
     TslParser parser;
     tsl_parser_init(&parser, code, code_size);
-    return tsl_parser_parse_expressions(&parser, TSL_TOKEN_END_OF_FILE);
+    result = tsl_parser_parse_expressions(&parser, TSL_TOKEN_END_OF_FILE);
+    tsl_parser_deinit(&parser);
+    return result;
 }