Make operators simply aliases to functions.

include/custom.h

@@ -61,10 +61,6 @@ struct libab_operator_s {
      * each operator.
      */
     enum libab_operator_variant_e variant;
-    /**
-     * The type of this operator.
-     */
-    libab_ref type;
     /**
      * The precedence of the operator.
      */
@@ -74,9 +70,9 @@ struct libab_operator_s {
      */
     int associativity;
     /**
-     * The behavior of this operator.
+     * The function called by this operator.
      */
-    struct libab_behavior_s behavior;
+    const char* function;
 };
 
 /**
@@ -132,12 +128,10 @@ void libab_behavior_free(libab_behavior* behavior);
  * @param precedence the precedence of the operator.
  * @param associativity the associativity (left = -1, right = 1) of the
  * operator.
- * @param type the type of the operator.
+ * @param function the function this operator represents.
- * @param func the function used to implement the operator.
  */
 void libab_operator_init(libab_operator* op, libab_operator_variant variant,
-                         int precedence, int associativity, libab_ref* type,
+                         int precedence, int associativity, const char* function);
-                         libab_function_ptr func);
 /**
  * Frees the given operator.
  * @param op the operator to free.

include/libabacus.h

@@ -78,38 +78,32 @@ libab_result libab_init(libab* ab, void* (*parse_function)(const char*),
  * @param op the operator string to register.
  * @param precedence the precedence of the operator.
  * @param associativity the associativity of the operator.
- * @param type the type of this operator.
+ * @param function the function this operator calls.
- * @param func the function that describes the functionality of the operator.
  * @return the result of the initialization.
  */
 libab_result libab_register_operator_infix(libab* ab, const char* op,
                                            int precedence, int associativity,
-                                           libab_ref* type,
+                                           const char* function);
-                                           libab_function_ptr func);
 /**
  * Registers an operation with libabacus that appears
  * before its operand.
  * @param ab the libabacus instance to register the operator with.
  * @param op the operator string to register.
- * @param type the type of this operator.
+ * @param function the function this operator calls.
- * @param func the function that describes the functionality of the operator.
  * @return the result of the registration.
  */
 libab_result libab_register_operator_prefix(libab* ab, const char* op,
-                                            libab_ref* type,
+                                            const char* function);
-                                            libab_function_ptr func);
 /**
  * Registers an operation with libabacus that appears
  * after its operand.
  * @param ab the libabacus instance to register the operator with.
  * @param op the operator string to register.
- * @param type the type of this operator.
+ * @param function the function this operator calls.
- * @param func the function that describes the functionality of the operator.
  * @return the result of the registration.
  */
 libab_result libab_register_operator_postfix(libab* ab, const char* op,
-                                             libab_ref* type,
+                                             const char* function);
-                                             libab_function_ptr func);
 
 /**
  * Registers a function with libabacus.

src/custom.c

@@ -18,18 +18,15 @@ void libab_behavior_free(libab_behavior* behavior) {
 }
 
 void libab_operator_init(libab_operator* op, libab_operator_variant variant,
-                         int precedence, int associativity, libab_ref* type,
+                         int precedence, int associativity, const char* function) {
-                         libab_function_ptr func) {
     op->variant = variant;
     op->precedence = precedence;
     op->associativity = associativity;
-    libab_ref_copy(type, &op->type);
+    op->function = function;
-    libab_behavior_init_internal(&op->behavior, func);
 }
 
 void libab_operator_free(libab_operator* op) {
-    libab_ref_free(&op->type);
+
-    libab_behavior_free(&op->behavior);
 }
 
 libab_result _function_init(libab_function* function, libab_ref* scope) {

src/interactive.c

@@ -75,14 +75,14 @@ libab_result register_functions(libab* ab) {
 
     TRY(libab_register_function(ab, "atan", &trig_type, function_atan));
     TRY(libab_register_function(ab, "atan2", &atan2_type, function_atan2));
-    TRY(libab_register_operator_infix(ab, "+", 0, -1, &atan2_type,
+    TRY(libab_register_function(ab, "plus", &atan2_type, function_operator));
-                                      function_operator));
+    TRY(libab_register_function(ab, "minus", &atan2_type, function_operator));
-    TRY(libab_register_operator_infix(ab, "-", 0, -1, &atan2_type,
+    TRY(libab_register_function(ab, "times", &atan2_type, function_operator));
-                                      function_operator));
+    TRY(libab_register_function(ab, "divide", &atan2_type, function_operator));
-    TRY(libab_register_operator_infix(ab, "*", 1, -1, &atan2_type,
+    TRY(libab_register_operator_infix(ab, "+", 0, -1, "plus"));
-                                      function_operator));
+    TRY(libab_register_operator_infix(ab, "-", 0, -1, "minus"));
-    TRY(libab_register_operator_infix(ab, "/", 1, -1, &atan2_type,
+    TRY(libab_register_operator_infix(ab, "*", 1, -1, "times"));
-                                      function_operator));
+    TRY(libab_register_operator_infix(ab, "/", 1, -1, "divide"));
 
     libab_ref_free(&trig_type);
     libab_ref_free(&atan2_type);

src/interpreter.c

@@ -636,66 +636,36 @@ libab_result _interpreter_try_call(struct interpreter_state* state,
     return result;
 }
 
-/**
- * Casts the paramters of an operator, and calls it.
- * @param state the state in which to perform the call on the operator.
- * @param to_call the operator to call.
- * @param params the parameters to give to the operator.
- * @param new_types the types to which to cast the parameters.
- * @param into the reference into which to store the result of the cold.
- * @return the result of the call.
- */
-libab_result _interpreter_cast_and_perform_operator_call(
-    struct interpreter_state* state,
-    libab_operator* to_call, libab_ref_vec* params, libab_ref_vec* new_types,
-    libab_ref* into) {
-    libab_result result = LIBAB_SUCCESS;
-    libab_ref_vec new_params;
-    libab_ref_null(into);
-
-    result = libab_ref_vec_init(&new_params);
-    if (result == LIBAB_SUCCESS) {
-        result = _interpreter_cast_params(params, new_types, &new_params);
-
-        if (result == LIBAB_SUCCESS) {
-            libab_ref_free(into);
-            result =
-                _interpreter_call_behavior(state, &to_call->behavior, params, into);
-        }
-
-        libab_ref_vec_free(&new_params);
-    }
-
-    return result;
-}
-
 libab_result _interpreter_run(struct interpreter_state* state, libab_tree* tree,
                               libab_ref* into, libab_ref* scope,
                               int force_scope);
 
+libab_result _interpreter_require_value(libab_ref* scope, const char* name,
+                                        libab_ref* into) {
+    libab_result result = LIBAB_SUCCESS;
+    libab_table_search_value(libab_ref_get(scope), name, into);
+    if(libab_ref_get(into) == NULL) {
+        result = LIBAB_UNEXPECTED;
+    }
+    return result;
+}
+
 libab_result _interpreter_call_operator(struct interpreter_state* state,
                                         libab_operator* to_call,
                                         libab_ref* into, libab_ref* scope,
                                         ...) {
     va_list args;
     libab_result result = LIBAB_SUCCESS;
+    libab_ref function_value;
     libab_ref_vec params;
-    libab_ref_vec new_types;
     libab_ref temp;
-    libab_parsetype* operator_type;
 
+    libab_ref_null(&function_value);
     va_start(args, scope);
-    operator_type = libab_ref_get(&to_call->type);
     result = libab_ref_vec_init(&params);
 
     if (result == LIBAB_SUCCESS) {
-        result = libab_ref_vec_init(&new_types);
+        /* Get first parameter. */
-        if (result != LIBAB_SUCCESS) {
-            libab_ref_vec_free(&params);
-        }
-    }
-
-    if (result == LIBAB_SUCCESS) {
         result =
             _interpreter_run(state, va_arg(args, libab_tree*), &temp, scope, 0);
 
@@ -705,6 +675,7 @@ libab_result _interpreter_call_operator(struct interpreter_state* state,
 
         libab_ref_free(&temp);
 
+        /* If infix, get second parameter. */
         if (result == LIBAB_SUCCESS && to_call->variant == OPERATOR_INFIX) {
             result = _interpreter_run(state, va_arg(args, libab_tree*), &temp,
                                       scope, 0);
@@ -717,19 +688,18 @@ libab_result _interpreter_call_operator(struct interpreter_state* state,
         }
 
         if(result == LIBAB_SUCCESS) {
-            result = _interpreter_check_types(&operator_type->children,
+            libab_ref_free(&function_value);
-                                              &params, &new_types);
+            result = _interpreter_require_value(scope, to_call->function, &function_value);
         }
 
         if(result == LIBAB_SUCCESS) {
-            result = _interpreter_cast_and_perform_operator_call(
+            result = _interpreter_try_call(state, &function_value, &params, into);
-                state, to_call, &params, &new_types, into);
         }
 
         libab_ref_vec_free(&params);
-        libab_ref_vec_free(&new_types);
     }
     va_end(args);
+    libab_ref_free(&function_value);
 
     return result;
 }
@@ -810,11 +780,7 @@ libab_result _interpreter_run(struct interpreter_state* state, libab_tree* tree,
     } else if (tree->variant == TREE_VOID) {
         libab_ref_null(into);
     } else if (tree->variant == TREE_ID) {
-        libab_table_search_value(libab_ref_get(scope), tree->string_value,
+        result = _interpreter_require_value(scope, tree->string_value, into);
-                                 into);
-        if (libab_ref_get(into) == NULL) {
-            result = LIBAB_UNEXPECTED;
-        }
     } else if (tree->variant == TREE_CALL) {
         result = _interpreter_run_function_node(state, tree, into, scope);
     } else if (tree->variant == TREE_OP) {

src/libabacus.c

@@ -92,7 +92,7 @@ void _initialize_behavior(libab_behavior* behavior, libab_ref* type,
 libab_result _register_operator(libab* ab, const char* op,
                                 libab_operator_variant token_type,
                                 int precedence, int associativity,
-                                libab_ref* type, libab_function_ptr func) {
+                                const char* function) {
     char op_buffer[8];
     libab_result result = LIBAB_SUCCESS;
     libab_table_entry* new_entry;
@@ -101,7 +101,7 @@ libab_result _register_operator(libab* ab, const char* op,
         new_entry->variant = ENTRY_OP;
         new_operator = &(new_entry->data_u.op);
         libab_operator_init(new_operator, token_type, precedence, associativity,
-                            type, func);
+                            function);
     } else {
         result = LIBAB_MALLOC;
     }
@@ -128,22 +128,19 @@ libab_result _register_operator(libab* ab, const char* op,
 
 libab_result libab_register_operator_infix(libab* ab, const char* op,
                                            int precedence, int associativity,
-                                           libab_ref* type,
+                                           const char* function) {
-                                           libab_function_ptr func) {
     return _register_operator(ab, op, OPERATOR_INFIX, precedence, associativity,
-                              type, func);
+                              function);
 }
 
 libab_result libab_register_operator_prefix(libab* ab, const char* op,
-                                            libab_ref* type,
+                                            const char* function) {
-                                            libab_function_ptr func) {
+    return _register_operator(ab, op, OPERATOR_PREFIX, 0, 0, function);
-    return _register_operator(ab, op, OPERATOR_PREFIX, 0, 0, type, func);
 }
 
 libab_result libab_register_operator_postfix(libab* ab, const char* op,
-                                             libab_ref* type,
+                                             const char* function) {
-                                             libab_function_ptr func) {
+    return _register_operator(ab, op, OPERATOR_POSTFIX, 0, 0, function);
-    return _register_operator(ab, op, OPERATOR_POSTFIX, 0, 0, type, func);
 }
 
 libab_result _create_value_function_internal(libab_ref* into, libab_ref* type,