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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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17
include/xo/reader/expect_expr_xs.hpp
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@ -12,6 +12,18 @@ namespace xo {
/** @class expect_expr_xs
* @brief state machine to expect + capture an expression
*
* Examples:
* @text
* def x : i64 = 5 ; // with allow_defs
* lambda (f : x64) { ... } ;
* if (prime(x)) { ... } ;
* 5 + x ;
* @endtext
*
* top exprstate when expect_expr_xs::start() invoked
* will receive parsed expression via
* exprstate::on_expr() or exprstate::on_expr_with_semicolon().
**/
class expect_expr_xs : public exprstate {
public:
@ -41,6 +53,9 @@ namespace xo {
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;
@ -50,7 +65,7 @@ namespace xo {
/** update exprstate in response to a successfully-parsed subexpression **/
virtual void on_expr(bp<Expression> expr,
parserstatemachine * p_psm) override;
/** update exprstate in response to a successfully-parsed subexpression,
/** update exprstate in response to a successfully-parsed subexpression
* that's terminated by semicolon ';'
**/
virtual void on_expr_with_semicolon(bp<Expression> expr,