Make the . operator into an instruction

[fur] / templates / program2.c

diff --git a/templates/program2.c b/templates/program2.c
index 5ca9f61..01203fd 100644 (file)
--- a/templates/program2.c
+++ b/templates/program2.c
@@ -12,7 +12,10 @@ enum Type {
   BUILTIN,
   CLOSURE,
   INTEGER,
-  STRING
+  LIST,
+  STRING,
+  STRUCTURE,
+  SYMBOL
 };
 
 enum Builtin;
@@ -37,14 +40,23 @@ struct Closure {
   size_t entry;
 };
 
+struct List;
+typedef struct List List;
+
+struct Structure;
+typedef struct Structure Structure;
+
 union Value;
 typedef union Value Value;
 union Value {
   Builtin builtin;
-  Closure closure;
   bool boolean;
-  char* string;
+  Closure closure;
   int32_t integer;
+  List* list;
+  char* string;
+  Structure* structure;
+  char* symbol;
 };
 
 struct Object {
@@ -52,6 +64,17 @@ struct Object {
   Value value;
 };
 
+struct List {
+  Object head;
+  List* tail;
+};
+
+struct Structure {
+  char* key;
+  Object value;
+  Structure* next;
+};
+
 #define BUILTIN_NIL (Object) { BUILTIN, (Value)(Builtin)NIL }
 
 void Object_deinitialize(Object* self) {
@@ -99,6 +122,7 @@ union Argument {
   void* pointer;
   char* string;
   int32_t integer;
+  char* symbol;
 };
 
 void callBuiltinPow(Thread* thread, size_t argumentCount) {
@@ -165,6 +189,7 @@ void callBuiltin(Thread* thread, Builtin b, size_t argumentCount) {
     case POW:
       callBuiltinPow(thread, argumentCount);
       break;
+
     case PRINT:
       callBuiltinPrint(thread, argumentCount);
       break;
@@ -175,7 +200,7 @@ void callBuiltin(Thread* thread, Builtin b, size_t argumentCount) {
 }
 
 void callClosure(Thread* thread, Closure closure, size_t argumentCount) {
-  assert(argumentCount == 0);
+  // TODO Find a way to assert the argument count
 
   Frame* returnFrame = malloc(sizeof(Frame));
   *returnFrame = thread->frame;
@@ -206,6 +231,29 @@ void inst_call(Thread* thread, Argument argument) {
   }
 }
 
+void inst_concat(Thread* thread, Argument argument) {
+  assert(!Stack_isEmpty(&(thread->stack)));
+  Object left = Stack_pop(&(thread->stack));
+  assert(!Stack_isEmpty(&(thread->stack)));
+  Object right = Stack_pop(&(thread->stack));
+
+  assert(left.type == STRING);
+  assert(right.type == STRING);
+
+  char* resultString = malloc(strlen(left.value.string) + strlen(right.value.string) + 1);
+  resultString[0] = '\0';
+
+  strcat(resultString, left.value.string);
+  strcat(resultString, right.value.string);
+
+  Object resultObject = (Object) {
+    STRING,
+    (Value)resultString
+  };
+
+  Stack_push(&(thread->stack), resultObject);
+}
+
 {% with name='add', operation='+' %}
   {% include "arithmetic_instruction.c" %}
 {% endwith %}
@@ -232,6 +280,47 @@ void inst_end(Thread* thread, Argument argument) {
   {% include "comparison_instruction.c" %}
 {% endwith %}
 
+void inst_field(Thread* thread, Argument argument) {
+  assert(!Stack_isEmpty(&(thread->stack)));
+  Object key = Stack_pop(&(thread->stack));
+  assert(key.type == SYMBOL);
+
+  assert(!Stack_isEmpty(&(thread->stack)));
+  Object structure = Stack_pop(&(thread->stack));
+  assert(structure.type == STRUCTURE);
+
+  while(structure.value.structure != NULL) {
+    if(strcmp(structure.value.structure->key, key.value.string) == 0) {
+      Stack_push(&(thread->stack), structure.value.structure->value);
+      return;
+    }
+    structure.value.structure = structure.value.structure->next;
+  }
+
+  assert(false); // Symbol wasn't found in structure
+}
+
+void inst_get(Thread* thread, Argument argument) {
+  assert(!Stack_isEmpty(&(thread->stack)));
+  Object indexObject = Stack_pop(&(thread->stack));
+  assert(indexObject.type == INTEGER);
+  int32_t index = indexObject.value.integer;
+
+  assert(!Stack_isEmpty(&(thread->stack)));
+  Object listObject = Stack_pop(&(thread->stack));
+  assert(listObject.type == LIST);
+  List* list = listObject.value.list;
+
+  while(index > 0) {
+    assert(list != NULL);
+    list = list->tail;
+    index--;
+  }
+
+  assert(list != NULL);
+  Stack_push(&(thread->stack), list->head);
+}
+
 {% with name='gt', operation='>' %}
   {% include "comparison_instruction.c" %}
 {% endwith %}
@@ -258,6 +347,28 @@ void inst_jump_if_false(Thread* thread, Argument argument) {
   }
 }
 
+void inst_list(Thread* thread, Argument argument) {
+  Object result;
+  result.type = LIST;
+  result.value.list = NULL;
+
+  int32_t count = argument.integer;
+
+  while(count > 0) {
+    assert(!Stack_isEmpty(&(thread->stack)));
+    Object item = Stack_pop(&(thread->stack));
+
+    List* node = malloc(sizeof(List));
+    node->head = item;
+    node->tail = result.value.list;
+
+    result.value.list = node;
+    count--;
+  }
+
+  Stack_push(&(thread->stack), result);
+}
+
 {% with name='lt', operation='<' %}
   {% include "comparison_instruction.c" %}
 {% endwith %}
@@ -309,7 +420,7 @@ void inst_push(Thread* thread, Argument argument) {
 
   if(strcmp(argumentString, "false") == 0) {
     Stack_push(&(thread->stack), (Object){ BOOLEAN, false });
-  }else if(strcmp(argumentString, "pow") == 0) {
+  } else if(strcmp(argumentString, "pow") == 0) {
     Object result;
     result.type = BUILTIN;
     result.value.builtin = POW;
@@ -350,6 +461,16 @@ void inst_push_string(Thread* thread, Argument argument) {
   Stack_push(&(thread->stack), result);
 }
 
+void inst_push_symbol(Thread* thread, Argument argument) {
+  // TODO Store symbols in a symbol table so they can be looked up by reference
+  // without string comparison
+  Object result;
+  result.type = SYMBOL;
+  result.value.symbol = argument.symbol;
+
+  Stack_push(&(thread->stack), result);
+}
+
 {% with name='sub', operation='-' %}
   {% include "arithmetic_instruction.c" %}
 {% endwith %}
@@ -369,6 +490,33 @@ void inst_return(Thread* thread, Argument argument) {
   free(returnFrame);
 }
 
+void inst_structure(Thread* thread, Argument argument) {
+  Object result;
+  result.type = STRUCTURE;
+  result.value.structure = NULL;
+
+  int32_t count = argument.integer;
+
+  while(count > 0) {
+    assert(!Stack_isEmpty(&(thread->stack)));
+    Object key = Stack_pop(&(thread->stack));
+    assert(key.type == SYMBOL);
+
+    assert(!Stack_isEmpty(&(thread->stack)));
+    Object value = Stack_pop(&(thread->stack));
+
+    Structure* node = malloc(sizeof(Structure));
+    node->key = key.value.string;
+    node->value = value;
+    node->next = result.value.structure;
+
+    result.value.structure = node;
+    count--;
+  }
+
+  Stack_push(&(thread->stack), result);
+}
+
 struct Instruction;
 typedef const struct Instruction Instruction;
 struct Instruction {