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Re: the type parser [message #44067]

Mon, 16 May 2005 02:26

marc schellens[1]
Messages: 183
Registered: January 2000

Senior Member

IDL scans the strings.
Its not really difficult but due to the many ways constants can be
defined
in IDL it gets a little bit complicated.
Here is the relevant GDL
(http://sourceforge.net/projects/gnudatalanguage)
code (in antlr, http://www.antlr.org) wich is 100% compatible to IDL.
The assignment to _ttype sets the determined type.
If you translate this into IDL you got what you need.
HDH,
marc

protected
D
: ('0'..'9')
;

protected
L
: ('a'..'z'|'_')
;

protected
H
: ('a'..'f'|'0'..'9')
;

protected
O
: ('0'..'7')
;

protected
EXP
: ('e' ('+'|'-')? (D)+)
;

protected
DBL_E
: 'd' { $setText( "E");}
;

protected
DBL
: (DBL_E (('+'|'-')? (D)+)?)
;

protected
CONSTANT_HEX_BYTE:;
protected
CONSTANT_HEX_LONG:;
protected
CONSTANT_HEX_LONG64:;
protected
CONSTANT_HEX_I:; // integer or larger
protected
CONSTANT_HEX_INT:;
protected
CONSTANT_HEX_ULONG:;
protected
CONSTANT_HEX_ULONG64:;
protected
CONSTANT_HEX_UI:;
protected
CONSTANT_HEX_UINT:;
protected
CONSTANT_BYTE:;
protected
CONSTANT_LONG:;
protected
CONSTANT_LONG64:;
protected
CONSTANT_I:; // integer or larger if necessary
protected
CONSTANT_INT:;
protected
CONSTANT_ULONG:;
protected
CONSTANT_ULONG64:;
protected
CONSTANT_UI:;
protected
CONSTANT_UINT:;
protected
CONSTANT_OCT_BYTE:;
protected
CONSTANT_OCT_LONG:;
protected
CONSTANT_OCT_LONG64:;
protected
CONSTANT_OCT_I:; // integer or larger if necessary
protected
CONSTANT_OCT_INT:;
protected
CONSTANT_OCT_ULONG:;
protected
CONSTANT_OCT_ULONG64:;
protected
CONSTANT_OCT_UI:;
protected
CONSTANT_OCT_UINT:;
protected
CONSTANT_FLOAT:;
protected
CONSTANT_DOUBLE:;
protected
STRING_LITERAL:;
protected
DOT:;

CONSTANT_OR_STRING_LITERAL
// could be a string, but octals have priority
: ('\"'(O)+ ( 'b' | 's' | "us" | "ub" | 'l' | 'u' | "ul" )?) =>
('\"'! (O)+ { _ttype=CONSTANT_OCT_I; } // DEFINT32
( 's'! { _ttype=CONSTANT_OCT_INT; }
| 'b'! { _ttype=CONSTANT_OCT_BYTE; }
| 'u'! { _ttype=CONSTANT_OCT_UI; } // DEFINT32
| "us"! { _ttype=CONSTANT_OCT_UINT; }
| "ub"! { _ttype=CONSTANT_OCT_BYTE; }
| 'l'! { _ttype=CONSTANT_OCT_LONG; }
| "ll"! { _ttype=CONSTANT_OCT_LONG64; }
| "ul"! { _ttype=CONSTANT_OCT_ULONG; }
| "ull"! { _ttype=CONSTANT_OCT_ULONG64; }
)?)
| ('\''(H)+'\'' ( 'x' | "xs" | "xb" | "xl" | "xu" | "xus" | "xub" |
"xul")) =>
('\''! (H)+ '\''! 'x'!
( { _ttype=CONSTANT_HEX_I; } // DEFINT32
| 's'! { _ttype=CONSTANT_HEX_INT; }
| 'b'! { _ttype=CONSTANT_HEX_BYTE; }
| 'u'! { _ttype=CONSTANT_HEX_UI; } // DEFINT32
| "us"! { _ttype=CONSTANT_HEX_UINT; }
| "ub"! { _ttype=CONSTANT_HEX_BYTE; }
| 'l'! { _ttype=CONSTANT_HEX_LONG; }
| "ll"! { _ttype=CONSTANT_HEX_LONG64; }
| "ul"! { _ttype=CONSTANT_HEX_ULONG; }
| "ull"! { _ttype=CONSTANT_HEX_ULONG64; }
))
| ('\''(O)+'\'' ( 'o' | "os" | "ol" | "ou" | "oul")) =>
('\''! (O)+ '\''! 'o'!
( { _ttype=CONSTANT_OCT_I; } // DEFINT32
| 's'! { _ttype=CONSTANT_OCT_INT; }
| 'b'! { _ttype=CONSTANT_OCT_BYTE; }
| 'u'! { _ttype=CONSTANT_OCT_UI; } // DEFINT32
| "us"! { _ttype=CONSTANT_OCT_UINT; }
| "ub"! { _ttype=CONSTANT_OCT_BYTE; }
| 'l'! { _ttype=CONSTANT_OCT_LONG; }
| "ll"! { _ttype=CONSTANT_OCT_LONG64; }
| "ul"! { _ttype=CONSTANT_OCT_ULONG; }
| "ull"! { _ttype=CONSTANT_OCT_ULONG64; }
))
// strings in IDL do not need trailing " or '
| '\"'! (~('\"'|'\r'|'\n')| '\"' '\"'! )*
( '\"'!
|
) { _ttype=STRING_LITERAL; }
| '\''! (~('\''|'\r'|'\n')| '\'' '\''! )*
( '\''!
|
) { _ttype=STRING_LITERAL; }
| (((D)+ (DBL | '.'(D)*(DBL))) | '.'(D)+(DBL)) =>
(
(
(D)+
( DBL
| '.'(D)*(DBL)
)
)
| '.'(D)+(DBL))
{ _ttype=CONSTANT_DOUBLE; }
| (((D)+ (EXP | '.'(D)*(EXP)?)) | '.'(D)+(EXP)?) =>
(
(
(D)+
( EXP
| '.'(D)*(EXP)?
)
)
| '.'(D)+(EXP)?)
{ _ttype=CONSTANT_FLOAT; }
| '.' { _ttype=DOT; }
| (D)+ { _ttype=CONSTANT_I; }
( 's'! { _ttype=CONSTANT_INT; }
| 'b'! { _ttype=CONSTANT_BYTE; }
| 'u'('s')?! { _ttype=CONSTANT_UINT; }
| "ub"! { _ttype=CONSTANT_BYTE; }
| 'l'! { _ttype=CONSTANT_LONG; }
| "ll"! { _ttype=CONSTANT_LONG64; }
| "ul"! { _ttype=CONSTANT_ULONG; }
| "ull"! { _ttype=CONSTANT_ULONG64; }
)?
;

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[Message index]

		Re: the type parser By: marc schellens[1] on Mon, 16 May 2005 02:26
		Re: the type parser By: R.Bauer on Sun, 15 May 2005 09:14
		Re: the type parser By: R.Bauer on Sun, 15 May 2005 09:03
		Re: the type parser By: Ken Mankoff on Sun, 15 May 2005 08:19
		Re: the type parser By: Chris Lee on Sun, 15 May 2005 05:26
		Re: the type parser By: R.Bauer on Fri, 20 May 2005 01:16
		Re: the type parser By: R.Bauer on Wed, 15 June 2005 02:36

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