Hi Bart,
Could I abuse a bit more of your time ?
My initial ordering problem came back because of the order of my rules.
I have this input : STRUCT myvar1, myvar2 ( INTEGER i1; INTEGER j1; )
The tree I'd like to have is :
#(DECL_VARIABLE 'myVar1'
#(STRUCT
#(DECL_VARIABLE 'i1' INTEGER)
#(DECL_VARIABLE 'j1' INTEGER)
)
)
#(DECL_VARIABLE 'myVar2'
#(STRUCT
#(DECL_VARIABLE 'i1' INTEGER)
#(DECL_VARIABLE 'j1' INTEGER)
)
)
I have a rule 'structure_members which rewrites '( INTEGER i1; INTEGER j1;
)' into #(STRUCT #(DECL_VARIABLE 'i1' INTEGER) #(DECL_VARIABLE 'j1' INTEGER)).
My problem is the main declaration rule :
declaration
: STRUCT identifiers[$structure_members.tree] structure_members
-> ^(DECL_VARIABLE identifiers+ structure_members)
The 'structure_members' are only available after identifiers are parsed, and I
cannot give identifiers the parameter $structure_members.tree as I wished (I get
a forward reference error).
Is there a way to pass the structure_members tree to identifiers rule ?
Cheers.
--
Robert
PS: All the input data I'm using:
=> INPUT = "INTEGER good; STRUCT myvar1, myvar2 ( INTEGER i1; INTEGER j1; )"
=> The example grammar to demonstrate the issue
/******************************************************************************
* LTR_ex4.g
******************************************************************************/
grammar LTR_ex4;
options {
k=1;
output=AST;
ASTLabelType=CommonTree;
}
tokens {
DIMS; DECL_VARIABLE;
}
translation_unit
: declaration (';'! declaration)*
;
declaration
: type_identifier identifiers[$type_identifier.tree]
-> ^(DECL_VARIABLE identifiers)+
| STRUCT identifiers[$structure_members.tree] '(' structure_members ')'
-> ^(DECL_VARIABLE identifiers)
;
structure_members
: (declaration ';')+
-> ^(STRUCT declaration+)
;
identifiers[CommonTree type]
: IDENTIFIER (',' IDENTIFIER)*
-> ({type} IDENTIFIER)+
;
type_identifier
: 'INTEGER'
;
STRUCT : 'STRUCT' ;
IDENTIFIER :('a'..'z' | '0'..'9')+ ;
WS : ( ' ' | '\t'| '\r'| '\n') {$channel=HIDDEN;};
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