Please explain these semantic actions for record types and how to execute them with the help of an example of a record type declaration. You can use the declaration: record { float x; float y; } p; as the example.   T -> record '{'       { Env.push(top); top = new Env(); Stack.push(ofset); offset = 0; } D '}'                       { T.type = record(top); T.width = offset; top = Env.pop(); offset = Stack.pop(); }

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Please explain these semantic actions for record types and how to execute them with the help of an example of a record type declaration. You can use the declaration: record { float x; float y; } p; as the example.

 

T -> record '{'       { Env.push(top); top = new Env(); Stack.push(ofset); offset = 0; }

D '}'                       { T.type = record(top); T.width = offset; top = Env.pop(); offset = Stack.pop(); }

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