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xo-reader: ++ lambda error reporting

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This commit is contained in:
Roland Conybeare 2025-07-20 00:14:55 -05:00
commit c6f6ee17d2
3 changed files with 57 additions and 15 deletions
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28
xo-reader/src/reader/lambda_xs.cpp
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@ -43,6 +43,34 @@ namespace xo {
lambda_xs::lambda_xs() : exprstate(exprstatetype::lambdaexpr) {}
const char *
lambda_xs::get_expect_str() const
{
/*
* lambda (x : f64) { ... } ;
* ^ ^ ^ ^
* | | | lm_3
* | | lm_2
* | lm_1:
* expect_expression
*/
switch (this->lmxs_type_) {
case lambdastatetype::invalid:
case lambdastatetype::lm_0:
case lambdastatetype::n_lambdastatetype:
assert(false); // impossible
return nullptr;
case lambdastatetype::lm_1:
return "lambda-params";
case lambdastatetype::lm_2:
return "lambda-body";
case lambdastatetype::lm_3:
return "semicolon";
}
return "?expect";
}
void
lambda_xs::on_lambda_token(const token_type & tk,
parserstatemachine * p_psm)