xo-XXX -> .xo-XXX (prep subrepo)
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/* @file GeneralizedExpression.cpp */
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#include "GeneralizedExpression.hpp"
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#include "pretty_expression.hpp"
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#include <cstdint>
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namespace xo {
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namespace scm {
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namespace {
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using xo::scm::prefix_type;
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prefix_type exprtype2prefix(exprtype x)
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{
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switch (x) {
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case exprtype::invalid: assert(false); break;
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case exprtype::constant: return prefix_type::from_chars("k");
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case exprtype::primitive: return prefix_type::from_chars("pm");
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case exprtype::define: return prefix_type::from_chars("def");
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case exprtype::assign: return prefix_type::from_chars("=");
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case exprtype::apply: return prefix_type::from_chars("@");
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case exprtype::lambda: return prefix_type::from_chars("lm");
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case exprtype::variable: return prefix_type::from_chars("var");
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case exprtype::ifexpr: return prefix_type::from_chars("if");
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case exprtype::sequence: return prefix_type::from_chars("seq");
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case exprtype::convert: return prefix_type::from_chars("cvt");
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case exprtype::n_expr: assert(false); break;
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}
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return prefix_type::from_chars("?expr");
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}
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}
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GeneralizedExpression::GeneralizedExpression(exprtype extype,
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TypeDescr valuetype)
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: extype_{extype},
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valuetype_ref_{type_ref::dwim(exprtype2prefix(extype), valuetype)}
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{}
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GeneralizedExpression::GeneralizedExpression(exprtype extype,
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prefix_type prefix,
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TypeDescr valuetype)
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: extype_{extype},
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valuetype_ref_{type_ref::dwim(prefix, valuetype)}
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{}
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std::string
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GeneralizedExpression::display_string() const {
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return tostr(*this);
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}
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#ifdef SUPERSEDED // currently all derived expression types support pretty printing
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std::uint32_t
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GeneralizedExpression::pretty_print(const ppindentinfo & ppii) const {
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// Slooooow fallback for subtypes that don't implement pretty printing support
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// Currently have support for:
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// - Variable
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// - Lambda
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// - DefineExpr
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// - Sequence
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// - Apply
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// - Primitive
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// - IfExpr
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ppstate * pps = ppii.pps();
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std::uint32_t saved = pps->pos();
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pps->write(display_string());
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if (ppii.upto() && !pps->has_margin())
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return false;
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return ppii.upto() ? pps->scan_no_newline(saved) : true;
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}
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#endif
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} /*namespace scm*/
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} /*namespace xo*/
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/* end GeneralizedExpression.cpp */
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