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xo-tokenizer xo-reader: + bool literals + if-expr parsing

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This commit is contained in:
Roland Conybeare 2025-07-22 07:20:56 -05:00
commit ce760bd5cf
30 changed files with 848 additions and 74 deletions
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16
xo-reader/include/xo/reader/parserstatemachine.hpp
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@ -28,10 +28,12 @@ namespace xo {
public:
parserstatemachine(exprstatestack * p_stack,
envframestack * p_env_stack,
parser_result * p_result)
parser_result * p_result,
bool debug_flag)
: p_stack_{p_stack},
p_env_stack_{p_env_stack},
p_result_{p_result}
p_result_{p_result},
debug_flag_{debug_flag}
{}
//const parser_result & result() const { return result_; }
@ -44,6 +46,8 @@ namespace xo {
exprstate & top_exprstate();
void push_exprstate(std::unique_ptr<exprstate> x);
bool debug_flag() const { return debug_flag_; }
/** lookup variable name in lexical context represented by
* this psm. nullptr if not found
**/
@ -54,9 +58,13 @@ namespace xo {
**/
void upsert_var(bp<Variable> x);
/** @return available variable bindings in current parsing state **/
bp<LocalEnv> top_envframe() const;
/** push frame @p x (with new variable bindings) onto environment stack **/
void push_envframe(const rp<LocalEnv> & x);
/** @return pop innermost environment frame and return it **/
rp<LocalEnv> pop_envframe();
/** @return number of stacked environment frames **/
size_t env_stack_size() const { return p_env_stack_->size(); }
// ----- parsing outputs -----
@ -71,6 +79,8 @@ namespace xo {
void on_operator_token(const token_type & tk);
void on_leftbrace_token(const token_type & tk);
void on_rightbrace_token(const token_type & tk);
void on_then_token(const token_type & tk);
void on_else_token(const token_type & tk);
// ----- parsing error -----
@ -91,6 +101,8 @@ namespace xo {
envframestack * p_env_stack_ = nullptr;
/** parser result object **/
parser_result * p_result_ = nullptr;
/** enable debug logging **/
bool debug_flag_ = false;
};
inline std::ostream &