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Difference between revisions of "ETrice/GSoC/2012/GACL"
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*Casts corresponding to static casts in C . | *Casts corresponding to static casts in C . | ||
− | === Thoughts on Syntax | + | === Thoughts on Syntax & Grammar === |
Although syntax for GACL is still being designed but here are few thought regarding syntax . | Although syntax for GACL is still being designed but here are few thought regarding syntax . | ||
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==== TypeDeclaration ==== | ==== TypeDeclaration ==== | ||
− | Syntax | + | ===== Syntax ===== |
type prt type xyz int | type prt type xyz int | ||
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prt {pqr p}; | prt {pqr p}; | ||
− | + | ===== Action ===== | |
*Declares a type prt ended with whitespace | *Declares a type prt ended with whitespace | ||
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*Creates prt declared already with p of type pqr abstracted in it ended with semicolon | *Creates prt declared already with p of type pqr abstracted in it ended with semicolon | ||
− | Grammar | + | ===== Grammar ===== |
{ "type" typename [ existingtype | "{" TypeCode "}" ] [";" | "\n" | "\t" | " "] } | {typename typecode} | { "type" typename [ existingtype | "{" TypeCode "}" ] [";" | "\n" | "\t" | " "] } | {typename typecode} | ||
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==== VariableDeclaration ==== | ==== VariableDeclaration ==== | ||
− | Syntax | + | ===== Syntax ===== |
int x | int x | ||
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==== Expression ==== | ==== Expression ==== | ||
+ | |||
+ | ===== Syntax ===== | ||
{ [[ETrice/GSoC/2012/GACL#ArithmeticExpression|ArithmeticExpression]] | [[ETrice/GSoC/2012/GACL#LogicalExpression|LogicalExpression]] } | { [[ETrice/GSoC/2012/GACL#ArithmeticExpression|ArithmeticExpression]] | [[ETrice/GSoC/2012/GACL#LogicalExpression|LogicalExpression]] } | ||
===== ArithmeticExpression ===== | ===== ArithmeticExpression ===== | ||
+ | |||
+ | ====== Syntax ====== | ||
{ [[ETrice/GSoC/2012/GACL#Expression|Expression]] { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } [[ETrice/GSoC/2012/GACL#Expression|Expression]] } | { [[ETrice/GSoC/2012/GACL#Expression|Expression]] { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } [[ETrice/GSoC/2012/GACL#Expression|Expression]] } | ||
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===== LogicalExpression ===== | ===== LogicalExpression ===== | ||
+ | |||
+ | ====== Syntax ====== | ||
{ [[ETrice/GSoC/2012/GACL#Expression|Expression]] { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } [[ETrice/GSoC/2012/GACL#Expression|Expression]] } | { [[ETrice/GSoC/2012/GACL#Expression|Expression]] { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } [[ETrice/GSoC/2012/GACL#Expression|Expression]] } | ||
==== Statement ==== | ==== Statement ==== | ||
+ | |||
+ | ===== Syntax ===== | ||
{ [[ETrice/GSoC/2012/GACL#TypeDeclaration|TypeDeclaration]] | [[ETrice/GSoC/2012/GACL#VariableDeclaration|VariableDeclaration]] | [[ETrice/GSoC/2012/GACL#Expression|Expression]] } | { [[ETrice/GSoC/2012/GACL#TypeDeclaration|TypeDeclaration]] | [[ETrice/GSoC/2012/GACL#VariableDeclaration|VariableDeclaration]] | [[ETrice/GSoC/2012/GACL#Expression|Expression]] } | ||
==== StatementList ==== | ==== StatementList ==== | ||
+ | |||
+ | ===== Syntax ===== | ||
{ [[ETrice/GSoC/2012/GACL#Empty|Empty]] | [[ETrice/GSoC/2012/GACL#Statement|Statement]] [[ETrice/GSoC/2012/GACL#Statementlist|Statementlist]] } | { [[ETrice/GSoC/2012/GACL#Empty|Empty]] | [[ETrice/GSoC/2012/GACL#Statement|Statement]] [[ETrice/GSoC/2012/GACL#Statementlist|Statementlist]] } | ||
==== Program ==== | ==== Program ==== | ||
+ | |||
+ | ===== Syntax ===== | ||
{ [[ETrice/GSoC/2012/GACL#Statementlist| Statementlist]] } | { [[ETrice/GSoC/2012/GACL#Statementlist| Statementlist]] } |
Revision as of 13:17, 31 March 2012
Contents
- 1 Generic Action Code Language (GACL)
- 2 Development Details and Core Information
- 3 Disambiguation
- 4 Project Proposal
- 5 Useful Links
Generic Action Code Language (GACL)
GACL is the language to describe the Detail Code for execution of ROOM Models in eTrice plugin . GACL aims at dealing with all features commonly available in imperative languages , especially Java , C/C++ . It will act as complement of current version of eTrice which uses code written in target language stored in a string as execution code . GACL would make user able to write execution code independent of target language .
Development Details and Core Information
Features of GACL
- Variable Declarations ( with optional initializers ) and Function Declaration .
- Comparison & arithmetic expressions .
- Basic types , and user defined types .
- If-else blocks and ladders .
- For , while , for each , enhanched for each .
- Support for iterators (that can be used by for each loops ) .
- Function Calls with arguments & diff types i.e. ref/value/address .
- type checking and as much as possible implicit type casting .
- Casts corresponding to static casts in C .
Thoughts on Syntax & Grammar
Although syntax for GACL is still being designed but here are few thought regarding syntax .
Empty
{}
TypeDeclaration
Syntax
type prt type xyz int type pqr { int Hello , char ch , prt p , op f1:int() , op f2:char(char,char) } type pqr' {pqr e1} prt {pqr p};
Action
- Declares a type prt ended with whitespace
- Creates a type xyz same as int where type declaration ended with newline
- Creates a type pqr representing a structure rather class with abstracted elements Hello of type int , ch of char , p of type prt and f1 and f2 of type op i.e. Operations . f1 and f2 can take use of their arguments and also other elements of pqr i.e. Hello and ch in this case and ended with a tab .
- Creates a type pqr' with e1 of pqr abstracted in it ended with newline
- Creates prt declared already with p of type pqr abstracted in it ended with semicolon
Grammar
{ "type" typename [ existingtype | "{" TypeCode "}" ] [";" | "\n" | "\t" | " "] } | {typename typecode}
VariableDeclaration
Syntax
int x y; y=2 x=y x=x+4 y=y+5
Grammar to be used is :-
[ type ] varname [ "=" { varname2 | Expression } ] { ";" | "\n" | "\t" | " "}
Expression
Syntax
{ ArithmeticExpression | LogicalExpression }
ArithmeticExpression
Syntax
{ Expression { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } Expression } | {Expression { "++" | "--" } } | { { "++" | "--" } Expression }
LogicalExpression
Syntax
{ Expression { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } Expression }
Statement
Syntax
{ TypeDeclaration | VariableDeclaration | Expression }
StatementList
Syntax
{ Empty | Statement Statementlist }
Program
Syntax
{ Statementlist }
Disambiguation
The syntax used to specify the grammar in brief is
- Things written in double quotes ("") stand as string written in source .
- Content inside braces ({}) represents required content .
- Content inside square brackets ([]) represents optional content .
- Everything rest is either terminal or non-terminals .
- Empty and statement list need a more thought to be done . We would surely finally come up with a better solution .
Project Proposal
Click Here to see the project proposal at gsoc's website .
Click Here to see the project proposal in my github repository .