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Expand preprocessor macros in C expressions.

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* c-lang.h: #include "macroexp.h", for macro_lookup_ftype.
(scan_macro_expansion, scanning_macro_expansion,
finished_macro_expansion): New function declarations.
(expression_macro_lookup_func, expression_macro_lookup_baton): New
variable declarations.
* parser-defs.h (expression_context_pc): New declaration.
* parse.c (expression_context_pc): New variable.
(parse_exp_1): Set expression_context_pc, as well as
expression_context_block.
* c-exp.y (yylex): If we're not already reading the result of a
macro expansion, try to macro-expand the next token.  When we're
done scanning a macro expansion, switch back to the mainline text.
Commas and `if's in a macro's expansion don't terminate the input.
* c-lang.c: #include "macroscope.h" and "gdb_assert.h".
(macro_original_text, macro_expanded_text,
expression_macro_lookup_func, expression_macro_lookup_baton): New
variables.
(scan_macro_expansion, scanning_macro_expansion,
finished_macro_expansion, scan_macro_cleanup, null_macro_lookup,
c_preprocess_and_parse): New functions.
(c_language_defn, cplus_language_defn, asm_language_defn): Call
c_preprocess_and_parse, instead of c_parse.
* Makefile.in (c_lang_h): Note that this #includes macroexp.h.
(c-lang.o): Note dependency on macroscope.h and gdb_assert.h.
This commit is contained in:
Jim Blandy 2002-05-17 17:57:48 +00:00
parent 1c509ca821
commit 84f0252a03
7 changed files with 211 additions and 11 deletions
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8
gdb/c-lang.h
View file

@ -24,6 +24,7 @@
#define C_LANG_H 1
#include "value.h"
#include "macroexp.h"
extern int c_parse (void); /* Defined in c-exp.y */
@ -49,6 +50,13 @@ extern void c_printstr (struct ui_file * stream, char *string,
unsigned int length, int width,
int force_ellipses);
extern void scan_macro_expansion (char *expansion);
extern int scanning_macro_expansion (void);
extern void finished_macro_expansion (void);
extern macro_lookup_ftype *expression_macro_lookup_func;
extern void *expression_macro_lookup_baton;
extern struct type *c_create_fundamental_type (struct objfile *, int);
extern struct type **const (c_builtin_types[]);