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xo-reader: wip: parsing lambda expressions [wip, non-functional]

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This commit is contained in:
Roland Conybeare 2024-08-17 01:09:17 -04:00
commit 0841fd7dbd
10 changed files with 289 additions and 5 deletions
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11
include/xo/reader/exprstate.hpp
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@ -59,6 +59,7 @@ namespace xo {
class exprstate {
public:
using Expression = xo::ast::Expression;
using Variable = xo::ast::Variable;
using exprtype = xo::ast::exprtype;
using token_type = token<char>;
using TypeDescr = xo::reflect::TypeDescr;
@ -92,9 +93,13 @@ namespace xo {
exprstatestack * p_stack,
rp<Expression> * p_emit_expr);
/** update exprstate when expecting a formal parameter **/
virtual void on_formal(const formal_arg & formal,
virtual void on_formal(const rp<Variable> & formal,
exprstatestack * p_stack,
rp<Expression> * p_emit_expr);
/** update expression when epecting a formal parameter list **/
virtual void on_formal_arglist(const std::vector<rp<Variable>> & argl,
exprstatestack * p_stack,
rp<Expression> * p_emit_expr);
/** print human-readable representation on @p os **/
virtual void print(std::ostream & os) const;
@ -103,6 +108,10 @@ namespace xo {
/** handle incoming 'def' token **/
virtual void on_def_token(const token_type & tk,
exprstatestack * p_stack);
/** handle incoming 'lambda' token **/
virtual void on_lambda_token(const token_type & tk,
exprstatestack * p_stack,
rp<Expression> * p_emit_expr);
/** handle incoming symbol token **/
virtual void on_symbol_token(const token_type & tk,
exprstatestack * p_stack,