282 lines
9.6 KiB
C++
282 lines
9.6 KiB
C++
/* @file DExpectQLiteralSsm.cpp
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*
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* @author Roland Conybeare, Mar 2026
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*/
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#include "ExpectQLiteralSsm.hpp"
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#include "ExpectQListSsm.hpp"
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#include "ExpectQArraySsm.hpp"
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#include <xo/object2/Float.hpp>
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#include <xo/object2/Integer.hpp>
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//#include "ssm/ISyntaxStateMachine_DExpectFormalArgSsm.hpp"
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//#include <xo/expression2/DVariable.hpp>
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//#include <xo/expression2/detail/IGCObject_DVariable.hpp>
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//#include <xo/printable2/Printable.hpp>
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//#include <xo/alloc2/arena/IAllocator_DArena.hpp>
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//#include <xo/facet/FacetRegistry.hpp>
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#include <xo/indentlog/scope.hpp>
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namespace xo {
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// using xo::print::APrintable;
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// using xo::print::ppstate;
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// using xo::print::ppindentinfo;
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using xo::mm::AGCObject;
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// using xo::mm::AAllocator;
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// using xo::facet::FacetRegistry;
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// using xo::reflect::typeseq;
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namespace scm {
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DExpectQLiteralSsm::DExpectQLiteralSsm(bool cxl_on_rightparen,
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bool cxl_on_rightbracket)
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: cxl_on_rightparen_{cxl_on_rightparen},
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cxl_on_rightbracket_{cxl_on_rightbracket}
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{}
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DExpectQLiteralSsm *
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DExpectQLiteralSsm::_make(DArena & arena,
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bool cxl_on_rightparen,
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bool cxl_on_rightbracket)
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{
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/* out-of-order so argl follows ssm in arena,
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* consistent with any subsequent arglist realloc.
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* Not a load-bearing choice however
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*/
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void * mem = arena.alloc_for<DExpectQLiteralSsm>();
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return new (mem) DExpectQLiteralSsm(cxl_on_rightparen, cxl_on_rightbracket);
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}
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obj<ASyntaxStateMachine,DExpectQLiteralSsm>
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DExpectQLiteralSsm::make(DArena & arena,
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bool cxl_on_rightparen,
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bool cxl_on_rightbracket)
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{
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obj<ASyntaxStateMachine,DExpectQLiteralSsm> retval(_make(arena,
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cxl_on_rightparen,
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cxl_on_rightbracket));
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return retval;
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}
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void
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DExpectQLiteralSsm::start(ParserStateMachine * p_psm,
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bool cxl_on_rightparen,
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bool cxl_on_rightbracket)
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{
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DArena::Checkpoint ckp = p_psm->parser_alloc().checkpoint();
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p_psm->push_ssm(ckp, DExpectQLiteralSsm::make(p_psm->parser_alloc(),
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cxl_on_rightparen,
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cxl_on_rightbracket));
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}
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syntaxstatetype
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DExpectQLiteralSsm::ssm_type() const noexcept {
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return syntaxstatetype::expect_qliteral;
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}
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std::string_view
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DExpectQLiteralSsm::get_expect_str() const
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{
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return "leftparen|leftbracket|leftbrace|string|f64|i64|bool";
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}
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void
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DExpectQLiteralSsm::on_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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switch (tk.tk_type()) {
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case tokentype::tk_f64:
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this->on_f64_token(tk, p_psm);
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return;
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case tokentype::tk_i64:
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this->on_i64_token(tk, p_psm);
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return;
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case tokentype::tk_leftparen:
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this->on_leftparen_token(tk, p_psm);
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return;
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case tokentype::tk_rightparen:
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this->on_rightparen_token(tk, p_psm);
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return;
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case tokentype::tk_leftbracket:
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this->on_leftbracket_token(tk, p_psm);
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return;
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case tokentype::tk_rightbracket:
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this->on_rightbracket_token(tk, p_psm);
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return;
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case tokentype::tk_comma:
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case tokentype::tk_lambda:
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case tokentype::tk_def:
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case tokentype::tk_deftype:
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case tokentype::tk_if:
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case tokentype::tk_symbol:
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case tokentype::tk_colon:
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case tokentype::tk_singleassign:
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case tokentype::tk_string:
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case tokentype::tk_bool:
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case tokentype::tk_semicolon:
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case tokentype::tk_invalid:
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case tokentype::tk_quote:
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case tokentype::tk_leftbrace:
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case tokentype::tk_rightbrace:
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case tokentype::tk_leftangle:
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case tokentype::tk_rightangle:
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case tokentype::tk_lessequal:
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case tokentype::tk_greatequal:
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case tokentype::tk_dot:
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case tokentype::tk_doublecolon:
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case tokentype::tk_assign:
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case tokentype::tk_yields:
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case tokentype::tk_plus:
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case tokentype::tk_minus:
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case tokentype::tk_star:
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case tokentype::tk_slash:
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case tokentype::tk_cmpeq:
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case tokentype::tk_cmpne:
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case tokentype::tk_nil:
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case tokentype::tk_type:
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case tokentype::tk_then:
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case tokentype::tk_else:
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case tokentype::tk_let:
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case tokentype::tk_in:
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case tokentype::tk_end:
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case tokentype::N:
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break;
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}
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Super::on_token(tk, p_psm);
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}
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void
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DExpectQLiteralSsm::on_f64_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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auto literal = DFloat::box<AGCObject>(p_psm->expr_alloc(),
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tk.f64_value());
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p_psm->pop_ssm();
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p_psm->on_quoted_literal(literal);
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}
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void
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DExpectQLiteralSsm::on_i64_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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auto literal = DInteger::box<AGCObject>(p_psm->expr_alloc(),
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tk.i64_value());
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p_psm->pop_ssm();
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p_psm->on_quoted_literal(literal);
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}
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#ifdef NOT_YET
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void
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DExpectQLiteralSsm::_accept_formal(obj<AAllocator> expr_alloc,
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DArena & parser_alloc,
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const DUniqueString * param_name,
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TypeDescr param_type)
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{
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/* note: param_type can be nullptr */
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TypeRef typeref
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= TypeRef::dwim(TypeRef::prefix_type::from_chars("formal"), param_type);
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DVariable * var = DVariable::make(expr_alloc,
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param_name,
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typeref);
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// need AGCObject facet to use DArray here.
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// May want to have gc feature that allows it to use
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// FacetRegistry on memory that stores obj<AExpression,..>
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//
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// In this case doesn't matter since DExpectQLiteralSsm not actually collected!
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obj<AGCObject,DVariable> var_o(var);
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if (argl_->size() == argl_->capacity()) {
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// need to expand argl_ capacity.
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// If DArena were to allow it (i.e. offer a realloc() feature,
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// could do this in place since this SSM is at the top of the parser stack.
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obj<AAllocator,DArena> mm(&parser_alloc);
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DArray * argl_2x = DArray::empty(mm, 2 * argl_->capacity());
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for (DArray::size_type i = 0, n = argl_->size(); i < n; ++i) {
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// TODO: prefer non-bounds-checked access here
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argl_2x->push_back(argl_->at(i));
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}
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// update in place
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this->argl_ = argl_2x;
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}
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this->argl_->push_back(var_o);
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}
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#endif
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void
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DExpectQLiteralSsm::on_leftparen_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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// replace self with specialized version for parsing a literal list
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p_psm->pop_ssm();
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DExpectQListSsm::start(p_psm);
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p_psm->on_token(tk);
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}
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void
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DExpectQLiteralSsm::on_rightparen_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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if (cxl_on_rightparen_) {
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p_psm->pop_ssm();
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p_psm->on_token(tk);
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return;
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}
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Super::illegal_token(tk, p_psm);
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}
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void
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DExpectQLiteralSsm::on_leftbracket_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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// replace self with specialized version for parsing a literal array
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p_psm->pop_ssm();
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DExpectQArraySsm::start(p_psm);
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p_psm->on_token(tk);
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}
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void
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DExpectQLiteralSsm::on_rightbracket_token(const Token & tk,
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ParserStateMachine * p_psm)
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{
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if (cxl_on_rightbracket_) {
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p_psm->pop_ssm();
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p_psm->on_token(tk);
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return;
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}
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Super::illegal_token(tk, p_psm);
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}
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bool
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DExpectQLiteralSsm::pretty(const ppindentinfo & ppii) const
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{
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return ppii.pps()->pretty_struct(ppii,
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"DExpectQLiteralSsm",
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refrtag("expect", this->get_expect_str()));
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}
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} /*namespace scm*/
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} /*namespace xo*/
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/* end DExpectQLiteralSsm.cpp */
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