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xo-reader2: + example app 'readerreplxx'

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This commit is contained in:
Roland Conybeare 2026-01-23 11:54:32 -05:00
commit 258d0823f5
16 changed files with 258 additions and 131 deletions
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1
xo-reader2/include/xo/reader2/SchematikaParser.hpp
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@ -157,6 +157,7 @@ namespace xo {
using ArenaConfig = xo::mm::ArenaConfig;
using AAllocator = xo::mm::AAllocator;
using ppindentinfo = xo::print::ppindentinfo;
using size_type = std::size_t;
public:
/** create parser in initial state;

22
xo-reader2/include/xo/reader2/SchematikaReader.hpp
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@ -18,11 +18,11 @@ namespace xo {
/** schematika expression parsed from input **/
obj<AExpression> expr_;
/** input span up to end of expression.
/** unconsumed portion of input span
* only relevant when result type is expression.
* (otherwise treat entire input as consumed)
* (otherwise input consumed)
**/
span_type consumed_;
span_type remaining_input_;
/** {src_function, error_description, input_state, error_pos} **/
TokenizerError tk_error_;
@ -36,18 +36,32 @@ namespace xo {
class SchematikaReader {
public:
using AAllocator = xo::mm::AAllocator;
using span_type = xo::mm::span<const char>;
using size_type = std::size_t;
public:
SchematikaReader(const ReaderConfig & config,
obj<AAllocator> expr_alloc);
/** true iff parser is at top-level.
* false iff parser is working on incomplete expression
**/
bool is_at_toplevel() const noexcept;
/** prepare interactive session
* (allows rvalue expressions at toplevel)
**/
void begin_interactive_session();
/** consume input @p input_cstr **/
const ReaderResult & read_expr(const char * input_cstr, bool eof);
const ReaderResult & read_expr(span_type input_span, bool eof);
/** reset to known starting point after encountering an error.
* - remainder of stashed current line.
* Necesary for well-formatted error reporting.
* - current parsing state
**/
void reset_to_idle_toplevel();
private:
/** tokenizer converts a stream of chars