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xo-reader2 stack: parenthesized expressions [WIP]

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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
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30
src/reader2/DExprSeqState.cpp
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@ -1,5 +1,5 @@
/** @file DExprSeqState.cpp
*
*
* @author Roland Conybeare, Jan 2026
**/
@ -9,6 +9,8 @@
#include "DLambdaSsm.hpp"
#include "DProgressSsm.hpp"
#include "DIfElseSsm.hpp"
#include "ParenSsm.hpp"
#include "ExpectExprSsm.hpp"
#include <xo/expression2/DConstant.hpp>
#include <xo/expression2/detail/IExpression_DConstant.hpp>
@ -152,9 +154,12 @@ namespace xo {
this->on_bool_token(tk, p_psm);
return;
case tokentype::tk_leftparen:
this->on_leftparen_token(tk, p_psm);
return;
// all the not-yet handled cases
case tokentype::tk_invalid:
case tokentype::tk_leftparen:
case tokentype::tk_rightparen:
case tokentype::tk_leftbracket:
case tokentype::tk_rightbracket:
@ -389,6 +394,27 @@ namespace xo {
Super::on_token(tk, p_psm);
}
void
DExprSeqState::on_leftparen_token(const Token & tk,
ParserStateMachine * p_psm)
{
switch (seqtype_) {
case exprseqtype::toplevel_interactive: {
DParenSsm::start(p_psm);
p_psm->on_token(Token::leftparen_token());
return;
}
case exprseqtype::toplevel_batch:
break;
case exprseqtype::N:
assert(false); // unreachable
break;
}
Super::on_token(tk, p_psm);
}
void
DExprSeqState::on_parsed_expression(obj<AExpression> expr,
ParserStateMachine * p_psm)