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xo-reader: + formal arglist error reporting

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This commit is contained in:
Roland Conybeare 2025-07-20 00:21:22 -05:00
commit 5ed8999ccf
2 changed files with 21 additions and 1 deletions
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4
xo-reader/include/xo/reader/expect_formal_arglist_xs.hpp
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@ -16,7 +16,7 @@ namespace xo {
* ^ ^ ^ ^ ^
* | | | | |
* | | | | argl_1b
* | argl_1a | argla
* | argl_1a | argl_1a
* argl_0 argl_1b
*
* argl_0 --on_leftparen_token()--> argl_1a
@ -55,6 +55,8 @@ namespace xo {
static void start(parserstatemachine * p_psm);
virtual const char * get_expect_str() const override;
virtual void on_leftparen_token(const token_type & tk,
parserstatemachine * p_psm) override;
virtual void on_formal(const rp<Variable> & formal,

18
xo-reader/src/reader/expect_formal_arglist_xs.cpp
View file

@ -43,6 +43,24 @@ namespace xo {
p_psm->push_exprstate(expect_formal_arglist_xs::make());
}
const char *
expect_formal_arglist_xs::get_expect_str() const {
switch (farglxs_type_) {
case formalarglstatetype::invalid:
case formalarglstatetype::n_formalarglstatetype:
assert(false); // impossible
break;
case formalarglstatetype::argl_0:
return "leftparen";
case formalarglstatetype::argl_1a:
return "formal-name";
case formalarglstatetype::argl_1b:
return "comma|rightparen";
}
return "?expect";
}
expect_formal_arglist_xs::expect_formal_arglist_xs()
: exprstate(exprstatetype::expect_formal_arglist),
farglxs_type_{formalarglstatetype::argl_0}