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Difference between revisions of "ETrice/GSoC/2012/GACL"

Line 21: Line 21:
 
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 .  
  
===== Empty =====
+
=== Empty ===
  
 
   {}
 
   {}
  
*'''Type Declaration'''
+
=== Type Declaration ===
  
 
   "type" typename [ '''type''' | "{" TypeCode "}"]
 
   "type" typename [ '''type''' | "{" TypeCode "}"]
  
*'''VariableDeclaration'''
+
=== VariableDeclaration ===
  
 
   ['''type'''] varname [ "=" { varname2 | '''Expression''' } ] { ";" | "\n" }
 
   ['''type'''] varname [ "=" { varname2 | '''Expression''' } ] { ";" | "\n" }
  
*'''Expression'''
+
=== Expression ===
  
 
   { '''ArithmeticExpression''' | '''LogicalExpression''' }
 
   { '''ArithmeticExpression''' | '''LogicalExpression''' }
  
**'''ArithmeticExpression'''
+
==== ArithmeticExpression ====
  
 
   { '''Expression''' { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } '''Expression''' }  
 
   { '''Expression''' { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } '''Expression''' }  
 
  | {'''Expression''' { "++" | "--" } } | { { "++" | "--" } '''Expression''' }
 
  | {'''Expression''' { "++" | "--" } } | { { "++" | "--" } '''Expression''' }
  
**'''LogicalExpression'''
+
==== LogicalExpression ====
  
 
   { '''Expression''' { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } '''Expression''' }
 
   { '''Expression''' { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } '''Expression''' }
  
*'''Statement'''
+
=== Statement ===
  
 
   { '''Expression''' | '''VariableDeclaration''' }
 
   { '''Expression''' | '''VariableDeclaration''' }
  
*'''StatementList'''
+
=== StatementList ===
  
 
   { [[ETrice/GSoC/2012/GACL#Empty|Empty]] | '''Statement''' '''StatementList''' }
 
   { [[ETrice/GSoC/2012/GACL#Empty|Empty]] | '''Statement''' '''StatementList''' }
  
*'''Program'''
+
=== Program ===
  
 
   { '''StatementList'''}
 
   { '''StatementList'''}

Revision as of 20:58, 30 March 2012

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

Although syntax for GACL is still being designed but here are few thought regarding syntax .

Empty

 {}

Type Declaration

 "type" typename [ type | "{" TypeCode "}"]

VariableDeclaration

 [type] varname [ "=" { varname2 | Expression } ] { ";" | "\n" }

Expression

 { ArithmeticExpression | LogicalExpression }

ArithmeticExpression

 { Expression { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } Expression } 
| {Expression { "++" | "--" } } | { { "++" | "--" } Expression }

LogicalExpression

 { Expression { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } Expression }

Statement

 { Expression | VariableDeclaration }

StatementList

 { Empty | Statement StatementList }

Program

 { 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 .

Useful Links