Compaq AA-PWCBD-TE manual Endcase, Onerror Endonerror, Equivalence Local Constant Variable, Syntax

Lexical Elements of the DEC Text Processing Utility Language 4.9 Reserved Words

ENDCASE

•Error statement

ON_ERROR ENDON_ERROR

•RETURN statement

•ABORT statement

•Miscellaneous declarations

EQUIVALENCE LOCAL CONSTANT

VARIABLE

GLOBAL, UNIVERSAL, BEGIN, and END are words reserved for future expansion of the DECTPU language.

The DECTPU declarations and statements are reserved words that you cannot define. Any attempt to redefine these words results in a compilation error.

4.9.4.1 Module Declaration

With the MODULE/ENDMODULE declaration, you can group a series of global CONSTANT declarations, VARIABLE declarations, PROCEDURE declarations, and executable statements as one entity. After you compile a module, the compiler will generate two procedures for you. One procedure returns the identification for the module and the other contains all the executable statements for the module. The procedure names generated by the compiler are module- name_MODULE_IDENT and module-name_MODULE_INIT, respectively.

Syntax

MODULE module-name IDENT string-literal [[declarations]] [[ON_ERROR ...

ENDON_ERROR]] statement_1; . . . statement_n; ENDMODULE

The declarations part of a module can include any number of global VARIABLE, CONSTANT, and PROCEDURE declarations.

The ON_ERROR/ENDON_ERROR block, if used, must appear after the declarations and before the DECTPU statements that make up the body of the module. Statements that make up the body of a module must be separated with semicolons. For more information on error handlers, see Section 4.9.4.14.

In the following example, the compiler creates two procedures: user_mod_ module_ident and user_mod_module_init. User_mod_module_ident returns the string "v1.0". User_mod_module_init calls the routine user_hello.

MODULE user_mod IDENT "v1.0"

PROCEDURE user_hello

MESSAGE ("Hello");

ENDPROCEDURE;

ON_ERROR

MESSAGE ("Good-bye");

END_ON_ERROR;

user_hello;

ENDMODULE

4–14Lexical Elements of the DEC Text Processing Utility Language