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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 === | |
{} | {} | ||
| − | + | === Type Declaration === | |
"type" typename [ '''type''' | "{" TypeCode "}"] | "type" typename [ '''type''' | "{" TypeCode "}"] | ||
| − | + | === VariableDeclaration === | |
['''type'''] varname [ "=" { varname2 | '''Expression''' } ] { ";" | "\n" } | ['''type'''] varname [ "=" { varname2 | '''Expression''' } ] { ";" | "\n" } | ||
| − | + | === Expression === | |
{ '''ArithmeticExpression''' | '''LogicalExpression''' } | { '''ArithmeticExpression''' | '''LogicalExpression''' } | ||
| − | + | ==== ArithmeticExpression ==== | |
{ '''Expression''' { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } '''Expression''' } | { '''Expression''' { "+" | "-" | "*" | "/" | "**" | "^" | "%" | "div" } '''Expression''' } | ||
| {'''Expression''' { "++" | "--" } } | { { "++" | "--" } '''Expression''' } | | {'''Expression''' { "++" | "--" } } | { { "++" | "--" } '''Expression''' } | ||
| − | + | ==== LogicalExpression ==== | |
{ '''Expression''' { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } '''Expression''' } | { '''Expression''' { "<" | "<=" | "==" | ">" | ">=" | "|" | "||" | "&" | "&&" | "^" } '''Expression''' } | ||
| − | + | === Statement === | |
{ '''Expression''' | '''VariableDeclaration''' } | { '''Expression''' | '''VariableDeclaration''' } | ||
| − | + | === StatementList === | |
{ [[ETrice/GSoC/2012/GACL#Empty|Empty]] | '''Statement''' '''StatementList''' } | { [[ETrice/GSoC/2012/GACL#Empty|Empty]] | '''Statement''' '''StatementList''' } | ||
| − | + | === Program === | |
{ '''StatementList'''} | { '''StatementList'''} | ||
Revision as of 20:58, 30 March 2012
Contents
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 .