compiler-errors - 注释中的代码正在编译

Question

我试图注释掉作业中的所有代码。但是，当我尝试编译(或正在发生的任何事情；我严重不知道)时，有一种尝试在引号内编译代码。根据我正在使用的书(“On On Smalltalk”-Winston)，Smalltalk会忽略初始的双引号，此双引号和下一个双引号之间的所有字符，最后它也忽略了下一个双引号。为什么这在这里不起作用？

我尝试将整个代码放在一组双引号中，结果更糟。

我专门使用Smalltalk/X。我只需要任何引起评论错误的帮助。

代码编译时出现的错误是:

===> Parser [error]: undeclared variable: Removes when compiling/evaluating for UndefinedObject while reading C:\Users\Discouraged\Desktop\blank.st at or near line 3 [relative to chunk start]

===> Parser [error]: undeclared variable: pop when compiling/evaluating for UndefinedObject while reading C:\Users\Discouraged\Desktop\blank.st at or near line 4 [relative to chunk start]

===> "[" unexpected. (missing ".", ":" or selector before it ?) when compiling/evaluating for UndefinedObject while reading C:\Users\Discouraged\Desktop\blank.st at or near line 5 [relative to chunk start]

===> unexpected end-of-input in String when compiling/evaluating for >UndefinedObject while reading C:\Users\Discouraged>\Desktop\blank.st at or near line 1 [relative to chunk start]

编码:

" 
Build a stack based (RPN - Reverse Polish Notation) calculator for rational 
numbers

Smalltalk at: #maxStackSize put: 32

Object subclass: #Stack    
   instanceVariableNames: 'stackArray stackTop'
   classVariableNames: ''
   poolDictionaries: ''
!
Stack class comment: '
   Redundant stack class
'
!

!Stack methodsFor: 'initialize'!

new
   ^ super new.
!

init
   stackArray := Array new: maxStackSize.
   stackTop := -1.
! !
"
"
!Stack class methodsFor: 'manipulating the stack'!
"
"
Removes the top entry from the stack.
pop
   [self empty 
      ifTrue: [
         Transcript
            cr;
            show: 'Stack is EMPTY!';
            cr.]
       ifFalse: [stackTop := stackTop - 1]. 
    ]
 !
"

Answer 1

您正在尝试使用fileout格式对Smalltalk进行编码，该格式仅用于记录和传输代码，而不用于开发。因此，难怪您会感到沮丧。相反，您应该加载IDE并使用浏览器来编写代码。 Smalltalk IDE是编写，测试和运行的令人愉悦的环境。

您的归档有一些问题。例如，您不能嵌套注释(“s”)。此外，您缺少尾随句号，注释引用不匹配，并且在字符串中应包含!时应将其转义为!!，这是已更正的文件输出下面。

但是，最重要的是，加载并使用IDE。您会发现使用IDE进行类分配将更加有趣。

" 
Build a stack based (RPN - Reverse Polish Notation) calculator for rational 
numbers
"

Smalltalk at: #maxStackSize put: 32.

Object subclass: #Stack    
   instanceVariableNames: 'stackArray stackTop'
   classVariableNames: ''
   poolDictionaries: ''
!
Stack class comment: '
   Redundant stack class
'
!

!Stack methodsFor: 'initialize'!

new
   ^ super new.
!

init
   stackArray := Array new: maxStackSize.
   stackTop := -1.
! !

!Stack methodsFor: 'manipulating the stack'!

pop
"Removes the top entry from the stack."
   self empty 
      ifTrue: [
         Transcript
            cr;
            show: 'Stack is EMPTY!!';           
            cr.]
       ifFalse: [stackTop := stackTop - 1]. 
!