0ba1a14be2
an intermediate "parser" namespace. Original-commit: flang-compiler/f18@690b6f0d1e Reviewed-on: https://github.com/flang-compiler/f18/pull/4 Tree-same-pre-rewrite: false
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#ifndef FORTRAN_USER_STATE_H_
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#define FORTRAN_USER_STATE_H_
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// Instances of ParseState (parse-state.h) incorporate instances of this
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// UserState class, which encapsulates any semantic information necessary for
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// parse tree construction so as to avoid any need for representing
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// state in static data.
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#include <cinttypes>
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#include <unordered_set>
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namespace Fortran {
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namespace parser {
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class UserState {
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public:
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using Label = std::uint64_t;
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bool IsDoLabel(Label label) const {
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return doLabels_.find(label) != doLabels_.end();
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}
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bool InNonlabelDoConstruct() const {
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return nonlabelDoConstructNestingDepth_ > 0;
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}
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void NewDoLabel(Label label) { doLabels_.insert(label); }
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void NewSubprogram() {
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doLabels_.clear();
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nonlabelDoConstructNestingDepth_ = 0;
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}
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void EnterNonlabelDoConstruct() { ++nonlabelDoConstructNestingDepth_; }
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void LeaveDoConstruct() {
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if (nonlabelDoConstructNestingDepth_ > 0) {
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--nonlabelDoConstructNestingDepth_;
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}
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}
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private:
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std::unordered_set<Label> doLabels_;
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int nonlabelDoConstructNestingDepth_{0};
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};
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} // namespace parser
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} // namespace Fortran
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#endif // FORTRAN_USER_STATE_H_
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