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[clang][doc] Provide documentation for FixedPointLiteral matcher #125122

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Feb 7, 2025
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[clang][doc] Provide documentation for FixedPointLiteral matcher #125122

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23 changes: 22 additions & 1 deletion clang/include/clang/ASTMatchers/ASTMatchers.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2489,7 +2489,28 @@ extern const internal::VariadicDynCastAllOfMatcher<Stmt, FloatingLiteral>
extern const internal::VariadicDynCastAllOfMatcher<Stmt, ImaginaryLiteral>
imaginaryLiteral;

/// Matches fixed point literals
/// Matches fixed-point literals eg.
/// 0.5r, 0.5hr, 0.5lr, 0.5uhr, 0.5ur, 0.5ulr
/// 1.0k, 1.0hk, 1.0lk, 1.0uhk, 1.0uk, 1.0ulk
/// Exponents 1.0e10k
/// Hexadecimal numbers 0x0.2p2r
///
/// Does not match implicit conversions such as first two lines:
/// \code
/// short _Accum sa = 2;
/// _Accum a = 12.5;
/// _Accum b = 1.25hk;
/// _Fract c = 0.25hr;
/// _Fract v = 0.35uhr;
/// _Accum g = 1.45uhk;
/// _Accum decexp1 = 1.575e1k;
/// \endcode
/// \compile_args{-ffixed-point;-std=c99}
///
/// The matcher \matcher{fixedPointLiteral()} matches
/// \match{1.25hk}, \match{0.25hr}, \match{0.35uhr},
/// \match{1.45uhk}, \match{1.575e1k}, but does not
/// match \nomatch{12.5} and \nomatch{2} from the code block.
extern const internal::VariadicDynCastAllOfMatcher<Stmt, FixedPointLiteral>
fixedPointLiteral;

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