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Remove read extension support from primitive-read

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* libguile/read.c (scm_read_sharp_extension): Remove.
(scm_read_sharp): Adapt.
This commit is contained in:
Andy Wingo 2021-03-03 22:30:49 +01:00
parent f2a2baa042
commit a574fdf964
1 changed files with 5 additions and 37 deletions
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42
libguile/read.c
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@ -1388,32 +1388,14 @@ scm_read_extended_symbol (scm_t_wchar chr, SCM port)
/* Top-level token readers, i.e., dispatchers. */
static SCM
scm_read_sharp_extension (int chr, SCM port)
{
SCM proc;
proc = scm_get_hash_procedure (chr);
if (scm_is_true (scm_procedure_p (proc)))
return scm_call_2 (proc, SCM_MAKE_CHAR (chr), port);
return SCM_UNSPECIFIED;
}
/* The reader for the sharp `#' character. It basically dispatches reads
among the above token readers. */
static SCM
scm_read_sharp (scm_t_wchar chr, SCM port)
#define FUNC_NAME "scm_lreadr"
{
SCM result;
chr = scm_getc (port);
result = scm_read_sharp_extension (chr, port);
if (!scm_is_eq (result, SCM_UNSPECIFIED))
return result;
switch (chr)
{
case '\\':
@ -1466,27 +1448,13 @@ scm_read_sharp (scm_t_wchar chr, SCM port)
return scm_read_syntax (chr, port);
case 'n':
return scm_read_nil (chr, port);
case '|':
return scm_read_r6rs_block_comment (chr, port);
default:
result = scm_read_sharp_extension (chr, port);
if (scm_is_eq (result, SCM_UNSPECIFIED))
{
/* To remain compatible with 1.8 and earlier, the following
characters have lower precedence than `read-hash-extend'
characters. */
switch (chr)
{
case '|':
return scm_read_r6rs_block_comment (chr, port);
default:
scm_i_input_error (FUNC_NAME, port, "Unknown # object: ~S",
scm_list_1 (SCM_MAKE_CHAR (chr)));
}
}
else
return result;
scm_i_input_error (FUNC_NAME, port, "Unknown # object: ~S",
scm_list_1 (SCM_MAKE_CHAR (chr)));
return SCM_UNSPECIFIED;
}
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME