[cfe-dev] How to get the Location of SystemFunction，I used the SourceLocation and miss some trouble

[Sam Parker]

Hi,
I've always used the getLocStart method to insert text at the beginning of a stmt.

Cheers,
Sam

Sam Parker
Research Student
Electronic Systems Design Group
School of Electronic, Electrical and Systems Engineering
Loughborough University

----- Reply message -----
From: "flappybird" <kingsleynj at 163.com>
To: <cfe-dev at cs.uiuc.edu>
Subject: [cfe-dev]How to get the Location of SystemFunction，I used the SourceLocation and miss some trouble
Date: Sat, May 24, 2014 12:47

hello,I try to Insert some code before a function when it was called.for
example:
char *p,*q;
strcpy(p,q);
^                  ^
I want to insert some code at this two place,but I failed to handle it.
I used just like this:
VisitCallExpr(CallExpr *CE){
if(FunctionDecl *FD=CE->getDirectCallee()) 
{
...
SourceRange sr = FD->getSourceRange();
SourceLocation ST1 = sr.getBegin();
...
}
}

but I found it make no difference when I used  Rewrite.InsertText(ST1,
tempfc, true, true);
trying to insert some code into it.
would you please tell me what's wrong with it and show me how to some this
problem
thank you



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