Register

L-attributed or S-attributed, inherited or synthesized?

3,678 views
4 votes
4 votes

image

How to solve this question?

Attributes calculated from children are synthesized, while attributes calculated from parents and/or siblings is inherited. And S-attributed are purely synthesized, while L-attributed are synthesized+inherited, is this right?

User Avatar

2 Answers

Best answer
14 votes
14 votes
Answer is D.

In S-attribute grammar we can have only synthesized attributes.

In L-attribute grammar we can have both synthesized as well as inherited attributes, but the inherited attributes must come from left side (not from right side) only. Here, $R_i = T_i, F_i = R_i, E_i = F_i$ violate this making this not L-attributed grammar,
• selected by
User Avatar
Voting & Accepting an answer helps improve the community
← PreviousNext →
← Previous in categoryNext in category →

Related questions

0 votes
0 votes
1 answer
2
radha gogia asked May 6, 2018
1,749 views
Convert the following L-attributed definition to S-attributed definition .
E->TE' E'->*T { printf('*') ;} E' | epsilon T-> id {printf (id.name) ;} A) E->E*T | T {printf('*');} T->id {printf(id.name);} B) E->TE' E'->* ... ;T*E {printf('*');} E->T T->id {printf (id.name) ;} D) None of these Please explain precisely .
E->TE'E'->*T { printf('*') ;} E' | epsilonT- id {printf (id.name) ;}A) E->E*T | T {printf('*');}T->id {printf(id.name);}B) E->TE'E'->*TME' | epsilonM->epsilon { printf('...
User Avatar
1 votes
1 votes
2 answers
3
Sourabh Kumar asked Feb 1, 2016
511 views
S l attributed
User Avatar
1 votes
1 votes
1 answer
4
KISHALAY DAS asked Nov 14, 2016
1,063 views
Compiler Inherited Attribute
User Avatar
Link Copied!