diff options
Diffstat (limited to 'doc/Interp.3')
| -rw-r--r-- | doc/Interp.3 | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/doc/Interp.3 b/doc/Interp.3 index 10aadb7..731007b 100644 --- a/doc/Interp.3 +++ b/doc/Interp.3 @@ -4,7 +4,7 @@ '\" '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. -'\" +'\" .TH Tcl_Interp 3 7.5 Tcl "Tcl Library Procedures" .so man.macros .BS @@ -15,28 +15,36 @@ Tcl_Interp \- client-visible fields of interpreter structures \fB#include <tcl.h>\fR .sp typedef struct { - char *\fIresult\fR; - Tcl_FreeProc *\fIfreeProc\fR; - int \fIerrorLine\fR; -} Tcl_Interp; + char *\fIresult\fR; + Tcl_FreeProc *\fIfreeProc\fR; + int \fIerrorLine\fR; +} \fBTcl_Interp\fR; -typedef void Tcl_FreeProc(char *\fIblockPtr\fR); +typedef void \fBTcl_FreeProc\fR( + char *\fIblockPtr\fR); .BE - .SH DESCRIPTION .PP The \fBTcl_CreateInterp\fR procedure returns a pointer to a Tcl_Interp -structure. This pointer is then passed into other Tcl procedures -to process commands in the interpreter and perform other operations -on the interpreter. Interpreter structures contain many fields -that are used by Tcl, but only three that may be accessed by -clients: \fIresult\fR, \fIfreeProc\fR, and \fIerrorLine\fR. +structure. Callers of \fBTcl_CreateInterp\fR should use this pointer +as an opaque token, suitable for nothing other than passing back to +other routines in the Tcl interface. Accessing fields directly through +the pointer as described below is no longer supported. The supported +public routines \fBTcl_SetResult\fR, \fBTcl_GetResult\fR, +\fBTcl_SetErrorLine\fR, \fBTcl_GetErrorLine\fR must be used instead. .PP -.VS 8.5 -\fBNote that access to all three fields, \fIresult\fB, \fIfreeProc\fB and -\fIerrorLine\fB is deprecated.\fR Use \fBTcl_SetResult\fR, -\fBTcl_GetResult\fR, and \fBTcl_GetReturnOptions\fR instead. -.VE 8.5 +For legacy programs and extensions no longer being maintained, compiles +against the Tcl 8.6 header files are only possible with the compiler +directives +.CS +#define USE_INTERP_RESULT +.CE +and/or +.CS +#define USE_INTERP_ERRORLINE +.CE +depending on which fields of the \fBTcl_Interp\fR struct are accessed. +These directives may be embedded in code or supplied via compiler options. .PP The \fIresult\fR and \fIfreeProc\fR fields are used to return results or error messages from commands. @@ -68,7 +76,7 @@ and store a pointer to it in \fIinterp->result\fR. In this case, the command procedure must also set \fIinterp->freeProc\fR to the address of a procedure that can free the value, or \fBTCL_DYNAMIC\fR if the storage was allocated directly by Tcl or by a call to -\fBTcl_Alloc\fR. +\fBTcl_Alloc\fR. If \fIinterp->freeProc\fR is non-zero, then Tcl will call \fIfreeProc\fR to free the space pointed to by \fIinterp->result\fR before it invokes the next command. |