#line | GameDev.net

Original Post

May 10, 2004 at 7:40 AM

Hey, I was looking thru the Cg Compiler code -- Quite interesting if you have never really given compilers much thought -- and I saw this statment #line 36 "parser.y" { some code } I think it was that. Can anybody shed some light on it. I''ve googled, but to no avail

Thanks,

Craazer

May 10, 2004 at 7:57 AM

I cant figure any use for that, can you?

SiCrane

Mod

473

SiCrane

May 10, 2004 at 3:32 PM

It''s commonly used in things like automated parser or lexer generators. For example, the parser.y file probably refers to a yacc-compatible grammer description that was fed to yacc or one of its relatives, so if errors turn up in the generated code the line directive refers to the line in the .y file. This is useful since most compile time errors are due to errors in the original source file (the grammar description), and not the generated code.

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