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Update (parser/where) to support optional line and column

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This commit is contained in:
Michael Camilleri 2020-12-15 14:12:33 +09:00
parent a55354357c
commit 77b79e9899
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GPG Key ID: 7EB218A48DF8B572
2 changed files with 29 additions and 3 deletions
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20
src/core/parse.c
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@ -985,8 +985,20 @@ static Janet cfun_parse_flush(int32_t argc, Janet *argv) {
}
static Janet cfun_parse_where(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
janet_arity(argc, 1, 3);
JanetParser *p = janet_getabstract(argv, 0, &janet_parser_type);
if (argc > 1) {
int32_t line = janet_getinteger(argv, 1);
if (line < 1)
janet_panicf("invalid line number %d", line);
p->line = (size_t) line;
}
if (argc > 2) {
int32_t column = janet_getinteger(argv, 2);
if (column < 0)
janet_panicf("invalid column number %d", column);
p->column = (size_t) column;
}
Janet *tup = janet_tuple_begin(2);
tup[0] = janet_wrap_integer(p->line);
tup[1] = janet_wrap_integer(p->column);
@ -1247,8 +1259,10 @@ static const JanetReg parse_cfuns[] = {
},
{
"parser/where", cfun_parse_where,
JDOC("(parser/where parser)\n\n"
"Returns the current line number and column of the parser's internal state.")
JDOC("(parser/where parser &opt line col)\n\n"
"Returns the current line number and column of the parser's internal state. If line or "
"line and col are provided, the current line number and column of the parser are set to "
"those values.")
},
{
"parser/eof", cfun_parse_eof,

12
test/suite0006.janet
View File

@ -128,6 +128,18 @@
(assert (not= nil (parse-error @"\xc3\x28")) "reject invalid utf-8 symbol")
(assert (not= nil (parse-error @":\xc3\x28")) "reject invalid utf-8 keyword")
# Parser line and column numbers
(defn parser-location [input &opt location]
(def p (parser/new))
(parser/consume p input)
(if location
(parser/where p ;location)
(parser/where p)))
(assert (= [1 7] (parser-location @"(+ 1 2)")) "parser location 1")
(assert (= [5 7] (parser-location @"(+ 1 2)" [5])) "parser location 2")
(assert (= [10 10] (parser-location @"(+ 1 2)" [10 10])) "parser location 3")
# String check-set
(assert (string/check-set "abc" "a") "string/check-set 1")
(assert (not (string/check-set "abc" "z")) "string/check-set 2")