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//===--- DurationRewriter.h - clang-tidy ------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_ABSEIL_DURATIONREWRITER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_ABSEIL_DURATIONREWRITER_H
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include <cinttypes>
#include <optional>
namespace clang::tidy::abseil {
/// Duration factory and conversion scales
enum class DurationScale : std::uint8_t {
Hours = 0,
Minutes,
Seconds,
Milliseconds,
Microseconds,
Nanoseconds,
};
/// Given a `Scale`, return the appropriate factory function call for
/// constructing a `Duration` for that scale.
llvm::StringRef getDurationFactoryForScale(DurationScale Scale);
/// Given a 'Scale', return the appropriate factory function call for
/// constructing a `Time` for that scale.
llvm::StringRef getTimeFactoryForScale(DurationScale Scale);
// Determine if `Node` represents a literal floating point or integral zero.
bool isLiteralZero(const ast_matchers::MatchFinder::MatchResult &Result,
const Expr &Node);
/// Possibly strip a floating point cast expression.
///
/// If `Node` represents an explicit cast to a floating point type, return
/// the textual context of the cast argument, otherwise `std::nullopt`.
std::optional<std::string>
stripFloatCast(const ast_matchers::MatchFinder::MatchResult &Result,
const Expr &Node);
/// Possibly remove the fractional part of a floating point literal.
///
/// If `Node` represents a floating point literal with a zero fractional part,
/// return the textual context of the integral part, otherwise `std::nullopt`.
std::optional<std::string>
stripFloatLiteralFraction(const ast_matchers::MatchFinder::MatchResult &Result,
const Expr &Node);
/// Possibly further simplify a duration factory function's argument, without
/// changing the scale of the factory function. Return that simplification or
/// the text of the argument if no simplification is possible.
std::string
simplifyDurationFactoryArg(const ast_matchers::MatchFinder::MatchResult &Result,
const Expr &Node);
/// Given the name of an inverse Duration function (e.g., `ToDoubleSeconds`),
/// return its `DurationScale`, or `std::nullopt` if a match is not found.
std::optional<DurationScale> getScaleForDurationInverse(llvm::StringRef Name);
/// Given the name of an inverse Time function (e.g., `ToUnixSeconds`),
/// return its `DurationScale`, or `std::nullopt` if a match is not found.
std::optional<DurationScale> getScaleForTimeInverse(llvm::StringRef Name);
/// Given a `Scale` return the fully qualified inverse functions for it.
/// The first returned value is the inverse for `double`, and the second
/// returned value is the inverse for `int64`.
const std::pair<llvm::StringRef, llvm::StringRef> &
getDurationInverseForScale(DurationScale Scale);
/// Returns the Time inverse function name for a given `Scale`.
llvm::StringRef getTimeInverseForScale(DurationScale Scale);
/// Assuming `Node` has type `double` or `int` representing a time interval of
/// `Scale`, return the expression to make it a suitable `Duration`.
std::string rewriteExprFromNumberToDuration(
const ast_matchers::MatchFinder::MatchResult &Result, DurationScale Scale,
const Expr *Node);
/// Assuming `Node` has a type `int` representing a time instant of `Scale`
/// since The Epoch, return the expression to make it a suitable `Time`.
std::string rewriteExprFromNumberToTime(
const ast_matchers::MatchFinder::MatchResult &Result, DurationScale Scale,
const Expr *Node);
/// Return `false` if `E` is a either: not a macro at all; or an argument to
/// one. In the both cases, we often want to do the transformation.
bool isInMacro(const ast_matchers::MatchFinder::MatchResult &Result,
const Expr *E);
AST_MATCHER_FUNCTION(ast_matchers::internal::Matcher<FunctionDecl>,
DurationConversionFunction) {
using namespace clang::ast_matchers;
return functionDecl(
hasAnyName("::absl::ToDoubleHours", "::absl::ToDoubleMinutes",
"::absl::ToDoubleSeconds", "::absl::ToDoubleMilliseconds",
"::absl::ToDoubleMicroseconds", "::absl::ToDoubleNanoseconds",
"::absl::ToInt64Hours", "::absl::ToInt64Minutes",
"::absl::ToInt64Seconds", "::absl::ToInt64Milliseconds",
"::absl::ToInt64Microseconds", "::absl::ToInt64Nanoseconds"));
}
AST_MATCHER_FUNCTION(ast_matchers::internal::Matcher<FunctionDecl>,
DurationFactoryFunction) {
using namespace clang::ast_matchers;
return functionDecl(hasAnyName("::absl::Nanoseconds", "::absl::Microseconds",
"::absl::Milliseconds", "::absl::Seconds",
"::absl::Minutes", "::absl::Hours"));
}
AST_MATCHER_FUNCTION(ast_matchers::internal::Matcher<FunctionDecl>,
TimeConversionFunction) {
using namespace clang::ast_matchers;
return functionDecl(hasAnyName(
"::absl::ToUnixHours", "::absl::ToUnixMinutes", "::absl::ToUnixSeconds",
"::absl::ToUnixMillis", "::absl::ToUnixMicros", "::absl::ToUnixNanos"));
}
AST_MATCHER_FUNCTION_P(ast_matchers::internal::Matcher<Stmt>,
comparisonOperatorWithCallee,
ast_matchers::internal::Matcher<Decl>, funcDecl) {
using namespace clang::ast_matchers;
return binaryOperator(
anyOf(hasOperatorName(">"), hasOperatorName(">="), hasOperatorName("=="),
hasOperatorName("<="), hasOperatorName("<")),
hasEitherOperand(ignoringImpCasts(callExpr(callee(funcDecl)))));
}
} // namespace clang::tidy::abseil
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_ABSEIL_DURATIONREWRITER_H
|
