Hi !
I'm ANTLR newbie and need some suggestions about the way ANTLR works.
I have very simple language construct. For example
struct
{
Integer i;
String str1;
Integer x;
Integer y;
String z;
}
I want to generate a couple of files from this structure. First of all
- appropriate POJO with getters and setters. At this moment I have
working grammar and generated lexer/parser using antlr3-maven-plugin.
It looks like this (the most interesting part):
/*
entry point
*/
main :(WS* myStruct)*;
myStruct returns [String structName]
: 'struct ' IDENT
'{'
variable*
'}'
{$structName = $IDENT.text;}
;
type returns [String typeName]
:
'Integer' {$typeName = "Integer ";}
|'String' {$typeName = "String ";}
;
variable returns [String variableName]
: type WS* IDENT WS*';' {$variableName = $IDENT.text;}
;
Using the following code I can access the name of the structure. But
how to get variables with their types ??
CommonTokenStream tokens = new CommonTokenStream(lexer);
SampleParser parser = new SampleParser(tokens);
SampleParser.myStruct_return msr = parser.myStruct();
System.out.println("struct name from code : "+msr.structName);
I see that StringTemplate is used as template engine. Could I use
Velocity together with ANTLR ? I have some ready-made templates in
Velocity, so it will be cool to just reuse them.
Since I need to use the same source for generation of different sorts
of output files I need some kind of reuse of AST or something else.
Any ideas how it's could be achieved ?
I'm lost a little, please help me to get out. Thanks !
Best regards, Stas.
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