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xo-reader2 xo-expresion2: work on define-expressions [WIP]

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This commit is contained in:
Roland Conybeare 2026-01-19 21:25:30 -05:00
commit 516b0932ee
40 changed files with 711 additions and 72 deletions
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17
xo-reader2/include/xo/reader2/ParserStateMachine.hpp
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@ -6,6 +6,7 @@
#pragma once
#include "ParserResult.hpp"
#include <xo/expression2/DVariable.hpp>
#include <xo/tokenizer2/Token.hpp>
#include <xo/alloc2/Allocator.hpp>
#include <xo/arena/DArena.hpp>
@ -32,14 +33,14 @@ namespace xo {
public:
ParserStateMachine(const ArenaConfig & config,
obj<AAllocator> * expr_alloc);
obj<AAllocator> expr_alloc);
/** @defgroup scm-parserstatemachine-accessors accessor methods **/
///@{
bool debug_flag() const noexcept { return debug_flag_; }
ParserStack * stack() const noexcept { return stack_; }
obj<AAllocator> * expr_alloc() const noexcept { return expr_alloc_; }
obj<AAllocator> expr_alloc() const noexcept { return expr_alloc_; }
const ParserResult & result() const noexcept { return result_; }
/** true iff state machine is currently idle (at top-level) **/
@ -65,6 +66,9 @@ namespace xo {
/** pop syntax state machine from top of @ref stack_ **/
void pop_ssm();
/** add variable to current local environment (innermost lexical scope) **/
void upsert_var(DVariable * var);
/** reset result to none **/
void reset_result();
@ -84,10 +88,13 @@ namespace xo {
**/
void on_token(const Token & tk);
/** update state for incoming define-token @p tk **/
/** operate state machine for incoming symbol-token @p tk **/
void on_symbol_token(const Token & tk);
/** operate state machine for incoming define-token @p tk **/
void on_def_token(const Token & tk);
/** update state for incoming if-token @p tk **/
/** operate state machine for incoming if-token @p tk **/
void on_if_token(const Token & tk);
///@}
@ -153,7 +160,7 @@ namespace xo {
* scenario, where top-level Expressions can be discarded
* once compiled.
**/
obj<AAllocator> * expr_alloc_ = nullptr;
obj<AAllocator> expr_alloc_;
/** current output from parser **/
ParserResult result_;