JPH0581008A - Indentation processing system - Google Patents

Abstract

PURPOSE:To automatize the indentation of a source code. CONSTITUTION:A nest sentence start character string and the character of an end condition corresponding to the string are stored in a nest information stack 2 as nest information whenever a nest sentence start character string appears in input data. On the other hand, an indent setting means 3 adds an indent in a size corresponding to the number of nest information stored in the nest information stack 2 to input data. A nest relation judgement means 4 fetches nest information stored last from the nest information stack 2 when the character of the nest end condition corresponding to the nest sentence start character string stored last in the nest information stack 2 appears in input data. The nest relation judgement means 4 stores other nest information in the nest information stack 2 when the other nest start character string appears in input data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indentation processing method in a program source code input operation, which is one step of computer software development.

[0002]

2. Description of the Related Art As one step of computer software development, there is an operation of inputting a program source code (so-called coding operation). As shown in FIG. 5, such a program source code is generally provided with an indent for each hierarchy for control statements such as while statements and if statements.

That is, normally, the program structure is composed of control statements for performing loops and branches, and processing statements contained therein. In general, an n-layer nest can be created by the appearance of a control statement in the control statement. Ordinary program developers code this nesting hierarchy (depth) in a format corresponding to the length of the indent. This makes it easy to recognize and understand the program structure. Conventionally, regarding the input method of source code,
Using an editing program such as a general-purpose text editor, each character is simply input as a character string. Therefore, the indentation is set in the same manner, which is performed by indenting with a space character or setting the beginning of the character string by operating the TAB key or the like.

[0004]

However, the above-mentioned conventional techniques have the following problems. That is, in the above-mentioned method, the operator needs to input all the blanks for setting the indent. Therefore, there is a problem that even though the user inputs data while interacting with the computer, the advantage cannot be fully utilized and the work load on the operator is heavy. The present invention has been made by paying attention to the above points, and by automatically setting the indent,
It is an object of the present invention to provide an indentation processing method that can reduce the burden on the operator and can improve the productivity and quality in the coding process.

[0005]

The indentation processing method of the present invention appears in input data and a nested sentence determination table that stores nested sentence start character strings and end condition characters that are in a nested relationship with each other. Store the nesting sentence start character string and the end condition character corresponding to the nesting sentence start character string as nesting information in order, and store in the nesting information stack that is sequentially fetched from the last stored nesting information and the nesting information stack. An indent setting means for adding an indent of a size corresponding to the total number of the nested information to the input data, and the input data, of the nesting end condition corresponding to the nesting sentence start character string stored last in the nesting information stack. When a character of the nesting condition appears, it is judged whether or not a character appears, and when the character of the nesting condition appears, the last stored entry from the nest information stack is While retrieving the information, in the input data, when the other nested start character string is encountered and is characterized in that it consists of a nested relation determination means for storing the other nest information to the nest information stack.

[0006]

In the indentation processing method of the present invention, a nested sentence start character string and a character of an end condition corresponding to the nested sentence start character string are paired and stored in the nested sentence judgment table. I'll do it. Then, each time a nested sentence start character string appears in the input data, the nested sentence start character string and the character of the end condition corresponding to the nested sentence start character string are sequentially stored as nested information in the nested information stack. On the other hand, the indent setting means adds to the input data an indent having a size corresponding to the total number of nest information stored in the nest information stack. On the other hand, the nesting relation judging means judges whether or not the character of the nesting end condition corresponding to the nesting sentence start character string last stored in the nesting information stack appears in the input data, and the nesting condition character When appears, the last stored nesting information is extracted from the nesting information stack. Also, this nesting information judging means stores the other nesting information in the nesting information stack when another nesting start character string appears in the input data.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of an apparatus according to the present invention. The processing device shown in the figure includes a nested sentence determination table 1, a nested information stack 2, an indent setting means 3, and a nested relation determination means 4. The nested statement determination table 1 is composed of a partial area of the main storage device,
A nested sentence start character string and a character of an end condition corresponding to the nested sentence start character string are stored as a pair.

FIG. 2 is an explanatory diagram of details of the nested sentence determination table. In the figure, a character string with an underline is a nested sentence start character string. Characters with double underline in the figure are characters of the corresponding end condition. That is, “{” and “}” are stored as a pair, and “whil
e () {”and“} ”are stored as a pair, and“ for () {”
And “}” are stored as a pair, “if () {” and “}” are stored as a pair, “switch () {” and “}” are stored as a pair, and “do () { "" And "}" are stored as a pair. Also, "while ()" and ";" are stored as a pair, "for ()" and ";" are stored as a pair,
"If ()" and ";" are stored as a pair, and "do ()"
And “;” are stored as a pair. Again, returning to the description of FIG.

The nested information stack 2 is composed of a partial area of the main storage device and the like, and the nested sentence start character string appearing in the input data and the character of the end condition corresponding to the nested sentence start character string appear. Store as nesting information in order.
Also, the nest information stored last is taken out in order.

FIG. 3 is an explanatory diagram of details of the nesting information stack. As illustrated, the nesting information stack stores a layer 21, a nesting sentence ID 22, and an end condition 23. The layer 21 is a numerical value indicating a nested layer.
If the nesting information is stored in order from the top, the hierarchy becomes deeper from the top in the figure. When new nesting information is stored, it is placed at the top, and the nesting information below is pushed down. Also, when it is fetched, it is fetched from the highest hierarchy, and the nested information below is pushed up.

The nested sentence ID 22 is an ID for identifying the nested sentence start character string stored in the nested sentence determination table shown in FIG. The end condition 23 is a part for storing the character of the end condition corresponding to the nested sentence start character string.
Again, returning to the description of FIG.

The indent setting means 3 adds to the input data an indent having a size corresponding to the total number of pieces of nest information stored in the nest information stack 2. That is, by referring to the highest level of the hierarchy 21 in the nested information stack shown in FIG. 3, a blank character of a number obtained by multiplying the numerical value stored here by the unit L of the indent setting is automatically input. The nesting relation judging means 4 judges whether or not the character of the nesting end condition corresponding to the nesting sentence start character string last stored in the nesting information stack 2 appears in the input data. Then, when the character of the nesting condition appears, the last-stored nesting information is taken out from the nesting information stack 2. on the other hand,
When another nesting start character string appears in the input data,
The other nesting information is stored in the nesting information stack 2. Next, a processing procedure in the above-mentioned device will be described.

FIG. 4 is a flow chart for explaining the processing procedure according to the present invention, and FIG. 5 is a diagram showing an example of input of a source program. In the program shown in FIG. 4, it is recognized which level of nesting the sentence to be entered is under, and an indent corresponding to the nesting level is set in the current line. Here, the current line refers to a line which the programming developer is inputting or is about to input.

First, the operator inputs the current line (step S1). After that, it is determined which nested sentence the current line is directly under by the presence or absence of the stored data in the nested information stack (step S2). When there is data in the nesting information stack, that is, when the current line itself exists in the nesting, the current line is based on the hierarchy of the nesting statement checked from the numerical value of the highest hierarchy 21 of the nesting information stack. An indent value for is created and set (step S3). That is, the input example 42 shown in FIG.
In the part of, nesting always exists. On the other hand, if there is no nested statement, the current line input is created and set with the indent value = “0” as being in the highest hierarchy (step S4). This corresponds to the part of the input example 41 shown in FIG.

Then, the input position is moved to the indent position set in step S3 or S4, and the line input in step S1 is output (step S5).
Further, it is checked whether or not the line data output in the above step S5 includes a character which is an end condition for the current nesting (step S6). If such a character of the end condition exists, the current nesting ends, so the information for the nest is removed from the nest information stack (step S7). For example, with respect to the nesting 43 shown in FIG. 5, the nesting 43 ends when the end condition 45 “}” is input.

On the other hand, in step S8, it is checked whether the input line data includes another nested statement. The method for checking this is to compare with the judgment character string registered in the nesting judgment table, and if they match, it is regarded as a nested statement. Then, in step S9, storage in the nested information stack is performed. For example, the "wh" of the nest 31 shown in FIG.
If it matches ile () {”, the nested sentence ID is“ whil
e () {”is set, a value obtained by adding 1 to the current nesting hierarchy is set in the hierarchy, and“} ”registered in the nesting determination table is set in the end condition. The nesting information stack shown in FIG. 5 is an example in which the highest level nesting 47, the while statement nesting 43, and the if statement nesting 46 shown in Fig. 5 are stored in this order: In step S10, it is checked whether the row data is the last row, and the last row is checked. If this is the case, the processing is terminated.In this example, the processing is terminated when the closing parenthesis of the termination condition 47 is input.

[0017]

As described above, according to the indentation processing method of the present invention, means for judging the nesting relation between sentences forming input data and the indentation based on the nesting hierarchy are set. Since the means is provided, the indent setting operation at the time of coding can be automatically performed. Therefore, the load on the programming developer can be significantly reduced. As a result, the programming developer can concentrate on the original coding work, and the productivity and quality of the software can be greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an apparatus according to the present invention.

FIG. 2 is an explanatory diagram of details of a nesting determination table.

FIG. 3 is an explanatory diagram of details of a nested information stack.

FIG. 4 is a flowchart illustrating a processing procedure according to the present invention.

FIG. 5 is a diagram showing an example of input of a source program.

[Explanation of symbols]

 1 Nested sentence judgment table 2 Nesting information stack 3 Indent setting means 4 Nesting relation judging means

Claims (1)

[Claims] 1. A nested statement determination table that stores a nested statement start character string and an end condition character that are in a nested relationship with each other, a nested statement start character string that appears in input data, and the nested statement start character. The characters of the end condition corresponding to the column are sequentially stored as nesting information, and at the time of fetching, the nesting information stack that is sequentially fetched from the last stored nesting information and the size according to the total number of nesting information stored in the nesting information stack And an indent setting means for adding an indent to the input data, and it is determined whether or not the character of the nesting end condition corresponding to the nesting sentence start character string last stored in the nesting information stack appears in the input data. , When the character of the nesting condition appears, the last stored nesting information is retrieved from the nesting information stack, while the input data And a nesting relation determining means for storing the other nesting information in the nesting information stack when another nesting start character string appears in the data.