[clangd] Boost scores for decls from current file in completion

Summary: This should, arguably, give better ranking.

Reviewers: ioeric, sammccall

Reviewed By: sammccall

Subscribers: mgorny, klimek, MaskRay, jkorous, mgrang, cfe-commits

Differential Revision: https://reviews.llvm.org/D46943

llvm-svn: 333906
This commit is contained in:
Ilya Biryukov 2018-06-04 14:50:59 +00:00
parent 59198ed040
commit f029646fa3
3 changed files with 72 additions and 12 deletions

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@ -8,6 +8,8 @@
//===---------------------------------------------------------------------===//
#include "Quality.h"
#include "index/Index.h"
#include "clang/AST/ASTContext.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/MathExtras.h"
@ -17,9 +19,18 @@ namespace clang {
namespace clangd {
using namespace llvm;
static bool hasDeclInMainFile(const Decl &D) {
auto &SourceMgr = D.getASTContext().getSourceManager();
for (auto *Redecl : D.redecls()) {
auto Loc = SourceMgr.getSpellingLoc(Redecl->getLocation());
if (SourceMgr.isWrittenInMainFile(Loc))
return true;
}
return false;
}
void SymbolQualitySignals::merge(const CodeCompletionResult &SemaCCResult) {
SemaCCPriority = SemaCCResult.Priority;
if (SemaCCResult.Availability == CXAvailability_Deprecated)
Deprecated = true;
}
@ -60,12 +71,25 @@ void SymbolRelevanceSignals::merge(const CodeCompletionResult &SemaCCResult) {
if (SemaCCResult.Availability == CXAvailability_NotAvailable ||
SemaCCResult.Availability == CXAvailability_NotAccessible)
Forbidden = true;
if (SemaCCResult.Declaration) {
// We boost things that have decls in the main file.
// The real proximity scores would be more general when we have them.
float DeclProximity =
hasDeclInMainFile(*SemaCCResult.Declaration) ? 1.0 : 0.0;
ProximityScore = std::max(DeclProximity, ProximityScore);
}
}
float SymbolRelevanceSignals::evaluate() const {
if (Forbidden)
return 0;
return NameMatch;
float Score = NameMatch;
// Proximity scores are [0,1] and we translate them into a multiplier in the
// range from 1 to 2.
Score *= 1 + ProximityScore;
return Score;
}
raw_ostream &operator<<(raw_ostream &OS, const SymbolRelevanceSignals &S) {
OS << formatv("=== Symbol relevance: {0}\n", S.evaluate());

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@ -64,6 +64,9 @@ struct SymbolRelevanceSignals {
// 0-1 fuzzy-match score for unqualified name. Must be explicitly assigned.
float NameMatch = 1;
bool Forbidden = false; // Unavailable (e.g const) or inaccessible (private).
/// Proximity between the best declaration and the query location. [0-1] score
/// where 1 is closest
float ProximityScore = 0;
void merge(const CodeCompletionResult &SemaResult);

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@ -58,17 +58,46 @@ TEST(QualityTests, SymbolQualitySignalExtraction) {
}
TEST(QualityTests, SymbolRelevanceSignalExtraction) {
auto AST = TestTU::withHeaderCode(R"cpp(
[[deprecated]]
int f() { return 0; }
)cpp")
.build();
TestTU Test;
Test.HeaderCode = R"cpp(
int test_func_in_header();
int test_func_in_header_and_cpp();
)cpp";
Test.Code = R"cpp(
int ::test_func_in_header_and_cpp() {
}
int test_func_in_cpp();
SymbolRelevanceSignals Relevance;
Relevance.merge(CodeCompletionResult(&findDecl(AST, "f"), /*Priority=*/42,
nullptr, false, /*Accessible=*/false));
EXPECT_EQ(Relevance.NameMatch, SymbolRelevanceSignals().NameMatch);
EXPECT_TRUE(Relevance.Forbidden);
[[deprecated]]
int test_deprecated() { return 0; }
)cpp";
auto AST = Test.build();
SymbolRelevanceSignals Deprecated;
Deprecated.merge(CodeCompletionResult(&findDecl(AST, "test_deprecated"),
/*Priority=*/42, nullptr, false,
/*Accessible=*/false));
EXPECT_EQ(Deprecated.NameMatch, SymbolRelevanceSignals().NameMatch);
EXPECT_TRUE(Deprecated.Forbidden);
// Test proximity scores.
SymbolRelevanceSignals FuncInCpp;
FuncInCpp.merge(CodeCompletionResult(&findDecl(AST, "test_func_in_cpp"),
CCP_Declaration));
/// Decls in the current file should get a proximity score of 1.0.
EXPECT_FLOAT_EQ(FuncInCpp.ProximityScore, 1.0);
SymbolRelevanceSignals FuncInHeader;
FuncInHeader.merge(CodeCompletionResult(&findDecl(AST, "test_func_in_header"),
CCP_Declaration));
/// Decls outside current file currently don't get a proximity score boost.
EXPECT_FLOAT_EQ(FuncInHeader.ProximityScore, 0.0);
SymbolRelevanceSignals FuncInHeaderAndCpp;
FuncInHeaderAndCpp.merge(CodeCompletionResult(
&findDecl(AST, "test_func_in_header_and_cpp"), CCP_Declaration));
/// Decls in both header **and** the main file get the same boost.
EXPECT_FLOAT_EQ(FuncInHeaderAndCpp.ProximityScore, 1.0);
}
// Do the signals move the scores in the direction we expect?
@ -104,6 +133,10 @@ TEST(QualityTests, SymbolRelevanceSignalsSanity) {
SymbolRelevanceSignals PoorNameMatch;
PoorNameMatch.NameMatch = 0.2f;
EXPECT_LT(PoorNameMatch.evaluate(), Default.evaluate());
SymbolRelevanceSignals WithProximity;
WithProximity.ProximityScore = 0.2;
EXPECT_LT(Default.evaluate(), WithProximity.evaluate());
}
TEST(QualityTests, SortText) {