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detailed parser error reporting [wip - 1 example]

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This commit is contained in:
Roland Conybeare 2025-07-19 21:09:57 -05:00
commit 65a83cd77c
19 changed files with 256 additions and 84 deletions
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30
xo-reader/include/xo/reader/parserstatemachine.hpp
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@ -7,6 +7,7 @@
#include "exprstate.hpp"
#include "envframestack.hpp"
#include "parser_result.hpp"
namespace xo {
namespace scm {
@ -27,10 +28,17 @@ namespace xo {
public:
parserstatemachine(exprstatestack * p_stack,
envframestack * p_env_stack,
rp<Expression> * p_emit_expr)
parser_result * p_result)
: p_stack_{p_stack},
p_env_stack_{p_env_stack},
p_emit_expr_{p_emit_expr} {}
p_result_{p_result}
{}
//const parser_result & result() const { return result_; }
//parser_result_state result_state() const { return result_state_; }
//const rp<Expression> & result_expr() const { return result_expr_; }
//const char * error_src_function() const { return error_src_function_; }
//const std::string & error_description() const { return error_description_; }
std::unique_ptr<exprstate> pop_exprstate();
exprstate & top_exprstate();
@ -57,13 +65,19 @@ namespace xo {
void on_expr_with_semicolon(bp<Expression> expr);
void on_symbol(const std::string & symbol);
// ---- parsing inputs -----
// ----- parsing inputs -----
void on_semicolon_token(const token_type & tk);
void on_operator_token(const token_type & tk);
void on_leftbrace_token(const token_type & tk);
void on_rightbrace_token(const token_type & tk);
// ----- parsing error -----
/** @p self_name location (implementation function) where error detected
**/
void on_error(const char * self_name, std::string error_description);
/** write human-readable representation on @p os **/
void print(std::ostream & os) const;
@ -72,13 +86,11 @@ namespace xo {
* generally speaking, push when to start new work for nested content;
* pop when work complete
**/
exprstatestack * p_stack_;
exprstatestack * p_stack_ = nullptr;
/** stack of environment frames, one for each enclosing lambda **/
envframestack * p_env_stack_;
/** if non-null, store next non-nested complete expressions in
* *p_emit_expr
**/
rp<Expression> * p_emit_expr_;
envframestack * p_env_stack_ = nullptr;
/** parser result object **/
parser_result * p_result_ = nullptr;
};
inline std::ostream &