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video_core/shader/ast: Make Indent() return a string_view
The returned string is simply a substring of our constexpr tabs string_view, so we can just use a string_view here as well, since the original string_view is guaranteed to always exist. Now the function is fully non-allocating.
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@ -3,6 +3,7 @@
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// Refer to the license.txt file included.
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// Refer to the license.txt file included.
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#include <string>
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#include <string>
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#include <string_view>
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#include <fmt/format.h>
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#include <fmt/format.h>
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@ -263,7 +264,9 @@ public:
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}
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}
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void operator()(const ASTIfElse& ast) {
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void operator()(const ASTIfElse& ast) {
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inner += Indent() + "else {\n";
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inner += Indent();
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inner += "else {\n";
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scope++;
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scope++;
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ASTNode current = ast.nodes.GetFirst();
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ASTNode current = ast.nodes.GetFirst();
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while (current) {
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while (current) {
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@ -271,15 +274,18 @@ public:
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current = current->GetNext();
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current = current->GetNext();
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}
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}
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scope--;
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scope--;
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inner += Indent() + "}\n";
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inner += Indent();
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inner += "}\n";
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}
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}
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void operator()(const ASTBlockEncoded& ast) {
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void operator()(const ASTBlockEncoded& ast) {
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inner += fmt::format("{}Block({}, {});\n", Indent(), ast.start, ast.end);
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inner += fmt::format("{}Block({}, {});\n", Indent(), ast.start, ast.end);
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}
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}
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void operator()(const ASTBlockDecoded& ast) {
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void operator()([[maybe_unused]] const ASTBlockDecoded& ast) {
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inner += Indent() + "Block;\n";
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inner += Indent();
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inner += "Block;\n";
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}
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}
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void operator()(const ASTVarSet& ast) {
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void operator()(const ASTVarSet& ast) {
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@ -335,22 +341,26 @@ public:
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}
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}
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private:
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private:
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std::string& Indent() {
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std::string_view Indent() {
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if (memo_scope == scope) {
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if (space_segment_scope == scope) {
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return tabs_memo;
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return space_segment;
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}
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}
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tabs_memo = tabs.substr(0, scope * 2);
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memo_scope = scope;
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// Ensure that we don't exceed our view.
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return tabs_memo;
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ASSERT(scope * 2 < spaces.size());
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space_segment = spaces.substr(0, scope * 2);
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space_segment_scope = scope;
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return space_segment;
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}
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}
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std::string inner{};
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std::string inner{};
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std::string_view space_segment;
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u32 scope{};
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u32 scope{};
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u32 space_segment_scope{};
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std::string tabs_memo{};
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static constexpr std::string_view spaces{" "};
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u32 memo_scope{};
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static constexpr std::string_view tabs{" "};
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};
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};
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std::string ASTManager::Print() {
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std::string ASTManager::Print() {
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