roland/xo-reader2
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

xo-reader2 stack: parenthesized expressions [WIP]

Browse source
This commit is contained in:
Roland Conybeare 2026-02-10 15:14:40 -05:00
commit d65eb54102
24 changed files with 1095 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/reader2/DLambdaSsm.cpp
View file

@ -136,6 +136,10 @@ namespace xo {
this->on_yields_token(tk, p_psm);
return;
case tokentype::tk_leftbrace:
this->on_leftbrace_token(tk, p_psm);
return;
// all the not-yet-handled cases
case tokentype::tk_def:
case tokentype::tk_if:
@ -152,7 +156,6 @@ namespace xo {
case tokentype::tk_rightparen:
case tokentype::tk_leftbracket:
case tokentype::tk_rightbracket:
case tokentype::tk_leftbrace:
case tokentype::tk_rightbrace:
case tokentype::tk_leftangle:
case tokentype::tk_rightangle:
@ -179,11 +182,6 @@ namespace xo {
}
Super::on_token(tk, p_psm);
#ifdef OBSOLETE
p_psm->illegal_input_on_token("DLambdaSsm::on_token",
tk,
this->get_expect_str());
#endif
}
void
@ -199,11 +197,6 @@ namespace xo {
}
Super::on_token(tk, p_psm);
#ifdef OBSOLETE
p_psm->illegal_input_on_token("DLambdaSsm::on_lambda_token",
tk,
this->get_expect_str());
#endif
}
void
@ -220,13 +213,28 @@ namespace xo {
}
Super::on_token(tk, p_psm);
#ifdef OBSOLETE
p_psm->illegal_input_on_token("DLambdaSsm::on_yields_token",
tk,
this->get_expect_str());
#endif
}
void
DLambdaSsm::on_leftbrace_token(const Token & tk,
ParserStateMachine * p_psm)
{
if (lmstate_ == lambdastatetype::lm_2) {
// control here when leftbrace immediately follows
// formal param list.
// Otherwise leftbrace arrives in DExpectExprSsm
// pushed via on_parsed_typedescr()
this->lmstate_ = lambdastatetype::lm_4;
DExpectExprSsm::start(p_psm);
// precharge ssm for body with leftbrace
p_psm->on_token(Token::leftbrace_token());
return;
}
Super::on_token(tk, p_psm);
}
void
DLambdaSsm::on_parsed_typedescr(TypeDescr td,