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New Language Extensions in the Sun Studio 12 C Compiler SDN Article Provides Overview of C-language Extensions Sun's Dmitry Mikhailichenko introduces SunTM Studio 12 C compiler's C-language extensions: typeof keyword, statement expressions and block-scope label names, all of which are part of the GNU C-implementation, in a SunSM Developer Network article. He also demonstrates using the new C compiler features for creating generic macros on example of linked-list manipulation-routines. typeof keyword
Find out what constructs of the "typeof" keyword (a new extension to the C language) are accepted by Sun Studio C compiler, its restrictions of declarations and use in macro definitions. He details the FINDMAX macro and uses it as an example to run code. Statement Expressions
Mikhailichenko explains the basics, covering similarities and differences that statement expressions have with compound statements and expressions. He references the generalized FINDMAX macro example created in the prior section and rewrites it using statement expressions. Block-scope Label Names
The new keyword __label__ limits visibility of labels within a block scope. In this section, Mikhailichenko explores declaring local labels and rewrites the FINDMAX macro to display local labels usage.
He then demonstrates implementing a list using typeof and statement expressions. He covers list declaration, inserting and removing an element on a list and list iterations. Three example programs are provided to demonstrate basic operations on a list of int's, a list of structures and constructing a list of lists.
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New Language Extensions in the Sun Studio 12 C Compiler
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