Roland Conybeare
7f4b4e7cbd
subrepo: subdir: "xo-interpreter2" merged: "e4c6ff57" upstream: origin: "git@github.com:Rconybea/xo-interpreter2.git" branch: "main" commit: "e4c6ff57" git-subrepo: version: "0.4.9" origin: "???" commit: "???"
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/** @file VsmOpcode.hpp
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*
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* @author Roland Conybeare, Jan 2026
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**/
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#pragma once
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#include <ostream>
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#include <cstdint>
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namespace xo {
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namespace scm {
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/** Opcode for a virtual schematika expression;
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* exeucted by VirtualSchematikaMachine
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**/
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enum class vsm_opcode {
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/** Flags bad state (defect in VSM itself) **/
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sentinel,
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/** Immediately halt virtual schematika machine. **/
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halt,
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/** Evaluate expression in expr register **/
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eval,
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/** Apply function in stack frame
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* See diagram in VirtualSchematikaMachine::_do_eval_apply_op
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**/
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apply,
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/** Eval arguments to function.
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* See diagram in VirtualSchematikaMachine::_do_eval_apply_op
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**/
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evalargs,
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/** continuation to complete execution of define-expression,
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* after evaluting rhs expression
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**/
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def_cont,
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/** continuation to restore vsm registers (local_env, stack, cont)
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* after invoking a closure
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**/
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apply_cont,
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/** continuation to act on a branch **/
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ifelse_cont,
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/** Loop over elements of a SequenceExpr **/
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seq_cont,
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/** sentinel, counts number of opcodes **/
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N,
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};
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static constexpr uint32_t n_opcode = static_cast<uint32_t>(vsm_opcode::N);
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/** stringified enum value **/
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const char *
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vsm_opcode_descr(vsm_opcode x);
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inline std::ostream &
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operator<<(std::ostream & os, vsm_opcode x) {
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os << vsm_opcode_descr(x);
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return os;
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}
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} /*namespace scm*/
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} /*namespace xo*/
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/* end VsmOpcode.hpp */
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