TAL Programmer's Guide

Glossary
096254 Tandem Computers Incorporated Glossary–3
code space. A part of virtual memory that is reserved for user code, user library code,
system code, and system library code. The current code space of your process consists
of an optional library code space and a user code space.
CODE statement. A statement that specifies machine codes or constants for inclusion in
the object code.
comment. A note that you insert into the source code to describe a construct or
operation in your source code. The compiler ignores comments during compilation.
A comment must either:
Begin with two hyphens (--) and terminate with the end of the line
Begin with an exclamation point (!) and terminate with either another
exclamation point or the end of the line
Common Run-Time Environment. See “CRE.”
compilation unit. A source file plus source code that is read in from other source files by
SOURCE directives, which together compose a single input to the compiler.
compiler directive. A compiler option that lets you control compilation, compiler
listings, and object code generation. For example, compiler directives let you compile
parts of the source file conditionally or suppress parts of a compiler listing.
compiler listing. The listing produced by the compiler after successful compilation. A
compiler listing can include a header, banner, warning and error messages, source
listing, maps, cross-references, and compilation statistics.
completion code. A value used to return information about a process to its caller when
the process completes execution. For example, the compiler returns to the TACL
product a completion code indicating the status of the compilation.
complex instruction set computing. See “CISC.”
condition. An operand that represents a true or false state.
condition code. A status returned by expressions and by some file system procedure
calls as follows:
Condition Code Meaning Expression Status Procedure Call Status
CCG Condition-code-greater-than Positive Warning
CCL Condition-code-less-than 0 Error
CCE Condition-code-equal-to Negative Successful execution
conditional expression. An expression that establishes the relationship between values
and results in a true or false value; an expression that consists of relational or Boolean
conditions and conditional operators.
constant. A number or a character string.
constant expression. An arithmetic expression that contains only constants, LITERALs,
and DEFINEs as operands.