Start stage 21

boot/stage20/cl.elna

@@ -8,6 +8,7 @@ program;
 (* Stage 20 compiler. *)
 
 (* - Allow program module body. *)
+(* - Addition handles adding a number to the pointer by adding multiple of the pointer size. *)
 
 type
 	ElnaListNode = record
@@ -2067,7 +2068,7 @@ begin
 	operand^.length := character_literal_node^.length
 end;
 
-proc elna_parser_variable_expression(cursor: ^ElnaLexerCursor);
+proc elna_parser_variable_expression(cursor: ^ElnaLexerCursor) -> ^ElnaTreeVariableExpression;
 var
 	result: ^ElnaTreeVariableExpression;
 	token: ^ElnaLexerToken;
@@ -2448,16 +2449,28 @@ proc elna_tac_sum_create(parser_node: ^ElnaTreeBinaryExpression, lhs: ^ElnaTacOp
 var
 	instruction: ^ElnaTacInstruction;
 	pointer_type: ^ElnaTypePointer;
+	variable_expression: ^ElnaTreeVariableExpression;
 begin
 	pointer_type := parser_node^.lhs^.type_decoration;
+	if parser_node^.operator = ElnaLexerKind.pipe then
 		instruction := elna_tac_instruction_create(ElnaTacOperator.add_ptr);
 
 		elna_tac_make_variable(@operand^.kind, @operand^.value, @operand^.length, symbol_table);
 		elna_tac_instruction_set_operand(instruction, 1, lhs^.kind, lhs^.value, lhs^.length);
 		elna_tac_instruction_set_operand(instruction, 2, rhs^.kind, rhs^.value, rhs^.length);
 		elna_tac_instruction_set_operand(instruction, 3, ElnaTacKind.constant, pointer_type^.base^.size, 0);
-	elna_tac_instruction_set_operand(instruction, 4, operand^.kind, operand^.value, operand^.length);
+		elna_tac_instruction_set_operand(instruction, 4, operand^.kind, operand^.value, operand^.length)
+	elsif pointer_type^.kind = ElnaTypeKind.pointer then
+		instruction := elna_tac_instruction_create(ElnaTacOperator.add_ptr);
 
+		elna_tac_make_variable(@operand^.kind, @operand^.value, @operand^.length, symbol_table);
+		elna_tac_instruction_set_operand(instruction, 1, lhs^.kind, lhs^.value, lhs^.length);
+		elna_tac_instruction_set_operand(instruction, 2, rhs^.kind, rhs^.value, rhs^.length);
+		elna_tac_instruction_set_operand(instruction, 3, ElnaTacKind.constant, pointer_type^.base^.size, 0);
+		elna_tac_instruction_set_operand(instruction, 4, operand^.kind, operand^.value, operand^.length)
+	else
+		instruction := elna_tac_binary_create(ElnaTacOperator.add, lhs, rhs, symbol_table, operand)
+	end;
 	return instruction
 end;
 
@@ -2490,7 +2503,7 @@ begin
 		elna_tac_unary_expression(instructions, parser_node^.rhs, symbol_table, @rhs);
 
 		if parser_node^.operator = ElnaLexerKind.plus then
-			instruction := elna_tac_binary_create(ElnaTacOperator.add, @lhs, @rhs, symbol_table, operand)
+			instruction := elna_tac_sum_create(parser_node, @lhs, @rhs, symbol_table, operand)
 		elsif parser_node^.operator = ElnaLexerKind.minus then
 			instruction := elna_tac_binary_create(ElnaTacOperator.subtract, @lhs, @rhs, symbol_table, operand)
 		elsif parser_node^.operator = ElnaLexerKind.pipe then
@@ -2594,7 +2607,7 @@ begin
 
 	if argument_entry <> nil then
 		elna_tac_binary_expression(instructions, argument_entry^.expression, symbol_table, arguments_operand);
-		arguments_operand := arguments_operand + #size(ElnaTacOperand);
+		arguments_operand := arguments_operand | 1;
 
 		argument_entry := argument_entry^.next;
 		goto elna_tac_call_loop
@@ -2818,7 +2831,7 @@ begin
 	if string_compare(field_access_expression^.field, field_access_expression^.length, current_field^.name, current_field^.length) = 0 then
 		field_type := current_field^.field_type;
 		field_count := field_count - 1;
-		current_field := current_field + #size(ElnaTypeField);
+		current_field := current_field | 1;
 		field_offset := field_offset + field_type^.size;
 		goto elna_tac_field_access_expression_field
 	end;
@@ -3421,7 +3434,7 @@ begin
 		end;
 		member_array_current^.field_type := field_type;
 
-		member_array_current := member_array_current + #size(ElnaTypeField);
+		member_array_current := member_array_current | 1;
 		memory_start := memory_start + 4;
 
 		memory_start := memory_start^;
@@ -3812,7 +3825,7 @@ begin
 	variable_map^.count := 0;
 
 	count := symbol_table^.count;
-	current_entry := symbol_table + 4;
+	current_entry := @symbol_table^.symbols;
 
 	.elna_rtl_symbol_table_loop;
 	if count > 0 then
@@ -3837,7 +3850,7 @@ begin
 		elna_symbol_table_enter(variable_map, current_entry^.name, current_entry^.length, pseudo_symbol);
 
 		count := count - 1;
-		current_entry := current_entry + #size(ElnaSymbolEntry);
+		current_entry := current_entry | 1;
 
 		goto elna_rtl_symbol_table_loop
 	end;
@@ -4531,7 +4544,7 @@ begin
 
 		if string_compare(parser_node^.field, parser_node^.length, current_field^.name, current_field^.length) = 0 then
 			field_count := field_count - 1;
-			current_field := current_field + #size(ElnaTypeField);
+			current_field := current_field | 1;
 			goto elna_type_field_access_expression_field
 		end;
 		base_type := current_field^.field_type
@@ -4700,7 +4713,7 @@ end;
  * symbol_name - Symbol name pointer.
  * name_length - Symbol name length.
  *
- * Returns the symbol pointer or 0 in a0.
+ * Returns the symbol pointer or nil.
  *)
 proc elna_symbol_table_lookup(symbol_table: ^ElnaSymbolTable, symbol_name: Word, name_length: Word);
 var
@@ -4708,12 +4721,13 @@ var
 	symbol_table_length: Word;
 	current_name: Word;
 	current_length: Word;
+	current_entry: ^ElnaSymbolEntry;
 begin
 	result := 0;
 	symbol_table_length := symbol_table^.count;
 
 	(* Go to the first symbol position. *)
-	symbol_table := symbol_table + 4;
+	current_entry := @symbol_table^.symbols;
 
 	.symbol_table_lookup_loop;
 	if symbol_table_length = 0 then
@@ -4721,9 +4735,8 @@ begin
 	end;
 
 	(* Symbol name pointer and length. *)
-	current_name := symbol_table^;
-	current_length := symbol_table + 4;
-	current_length := current_length^;
+	current_name := current_entry^.name;
+	current_length := current_entry^.length;
 
 	(* If lengths don't match, exit and return nil. *)
 	if name_length <> current_length then
@@ -4734,12 +4747,11 @@ begin
 		goto symbol_table_lookup_repeat
 	end;
 	(* Otherwise, the symbol is found. *)
-	result := symbol_table + 8;
-	result := result^;
+	result := current_entry^.symbol_info;
 	goto symbol_table_lookup_end;
 
 	.symbol_table_lookup_repeat;
-	symbol_table := symbol_table + 12;
+	current_entry := current_entry | 1;
 	symbol_table_length := symbol_table_length - 1;
 	goto symbol_table_lookup_loop;
 
@@ -4772,26 +4784,18 @@ end;
  *)
 proc elna_symbol_table_enter(symbol_table: ^ElnaSymbolTable, symbol_name: Word, name_length: Word, symbol: Word);
 var
-	table_length: Word;
-	symbol_pointer: Word;
+	symbol_pointer: ^ElnaSymbolEntry;
 begin
-	(* The first word in the symbol table is its length, get it. *)
-	table_length := symbol_table^;
-
 	(* Calculate the offset for the new symbol. *)
-	symbol_pointer := table_length * 12;
-	symbol_pointer := symbol_pointer + 4;
-	symbol_pointer := symbol_table + symbol_pointer;
+	symbol_pointer := @symbol_table^.symbols;
+	symbol_pointer := symbol_pointer | symbol_table^.count;
 
-	symbol_pointer^ := symbol_name;
-	symbol_pointer := symbol_pointer + 4;
-	symbol_pointer^ := name_length;
-	symbol_pointer := symbol_pointer + 4;
-	symbol_pointer^ := symbol;
+	symbol_pointer^.name := symbol_name;
+	symbol_pointer^.length := name_length;
+	symbol_pointer^.symbol_info := symbol;
 
 	(* Increment the symbol table length. *)
-	table_length := table_length + 1;
-	symbol_table^ := table_length
+	symbol_table^.count := symbol_table^.count + 1
 end;
 
 proc elna_symbol_table_build();
@@ -5531,11 +5535,3 @@ begin
 		exit(4)
 	end
 end;
-
-proc f();
-var
-	x: Word;
-	y: Word;
-begin
-	x := y
-end;