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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 3573ec800a
23 changed files with 712 additions and 53 deletions
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20
include/xo/reader/exprseq_xs.hpp
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@ -17,8 +17,6 @@ namespace xo {
* This used for top-level expressions in a translation unit.
**/
toplevel_batch,
/** nested sequence, for example in function body **/
nested,
};
/** @class exprseq_xs
@ -27,14 +25,14 @@ namespace xo {
* expression sequences come in several types:
* 1. top-level interactive
* 2. top-level batch
* 3. nested
*
* @text
* 1 2 3
* +--------
* def | y y y
* symbol | y n n 1: evaluate as variable
* i64 | y n n 1: evaluate as constant
* 1 2
* +-----
* def | y y
* if | y n 1: eval as expression
* symbol | y n 1: evaluate as variable
* i64 | y n 1: evaluate as constant
*
* @endtext
**/
@ -45,12 +43,18 @@ namespace xo {
static void start(exprseqtype seqtype, parserstatemachine * p_psm);
public:
virtual const char * get_expect_str() const override;
// ----- token input methods -----
virtual void on_def_token(const token_type & tk,
parserstatemachine * p_psm) override;
virtual void on_if_token(const token_type & tk,
parserstatemachine * p_psm) override;
virtual void on_symbol_token(const token_type & tk,
parserstatemachine * p_psm) override;
virtual void on_bool_token(const token_type & tk,
parserstatemachine * p_psm) override;
virtual void on_i64_token(const token_type & tk,
parserstatemachine * p_psm) override;