ABI updates for C++20 lambda-expression features: #85
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* include declarations for explicitly-specified template parameters in the lambda-sig mangling * add mangling for template parameters at different depths (possible via generic lambdas in unevaluated operands and via template template parameters in lambda-sigs) Fixes itanium-cxx-abi#31.
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This implements demangling support for the mangling extensions specified in itanium-cxx-abi/cxx-abi#85, much of which is implemented in Clang r359967 and r371004. Specifically, this provides demangling for: * <template-param-decl> in <lambda-sig> * <template-param> with non-zero level * lambda-expression literals (not emitted by Clang yet) * nullptr literals * string literals (The final two seem unrelated, but handling them was necessary in order to disambiguate between lambda expressions and the other forms of literal for which we have a type but no value.) When demangling a <lambda-sig>, we form template parameters with no corresponding argument, so we cannot substitute in the argument in the demangling. Instead we invent synthetic names for the template parameters (eg, '[]<typename $T>($T *x)'). llvm-svn: 371273
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This implements demangling support for the mangling extensions specified in itanium-cxx-abi/cxx-abi#85, much of which is implemented in Clang r359967 and r371004. Specifically, this provides demangling for: * <template-param-decl> in <lambda-sig> * <template-param> with non-zero level * lambda-expression literals (not emitted by Clang yet) * nullptr literals * string literals (The final two seem unrelated, but handling them was necessary in order to disambiguate between lambda expressions and the other forms of literal for which we have a type but no value.) When demangling a <lambda-sig>, we form template parameters with no corresponding argument, so we cannot substitute in the argument in the demangling. Instead we invent synthetic names for the template parameters (eg, '[]<typename $T>($T *x)'). git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@371273 91177308-0d34-0410-b5e6-96231b3b80d8
unevaluated operands and therefore in function signatures).
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arguments and default member initializers.
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This implements demangling support for the mangling extensions specified in itanium-cxx-abi/cxx-abi#85, much of which is implemented in Clang r359967 and r371004. Specifically, this provides demangling for: * <template-param-decl> in <lambda-sig> * <template-param> with non-zero level * lambda-expression literals (not emitted by Clang yet) * nullptr literals * string literals (The final two seem unrelated, but handling them was necessary in order to disambiguate between lambda expressions and the other forms of literal for which we have a type but no value.) When demangling a <lambda-sig>, we form template parameters with no corresponding argument, so we cannot substitute in the argument in the demangling. Instead we invent synthetic names for the template parameters (eg, '[]<typename $T>($T *x)'). llvm-svn: 371273
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This implements demangling support for the mangling extensions specified in itanium-cxx-abi/cxx-abi#85, much of which is implemented in Clang r359967 and r371004. Specifically, this provides demangling for: * <template-param-decl> in <lambda-sig> * <template-param> with non-zero level * lambda-expression literals (not emitted by Clang yet) * nullptr literals * string literals (The final two seem unrelated, but handling them was necessary in order to disambiguate between lambda expressions and the other forms of literal for which we have a type but no value.) When demangling a <lambda-sig>, we form template parameters with no corresponding argument, so we cannot substitute in the argument in the demangling. Instead we invent synthetic names for the template parameters (eg, '[]<typename $T>($T *x)'). git-svn-id: http://llvm.org/svn/llvm-project/libcxxabi/trunk@371273 91177308-0d34-0410-b5e6-96231b3b80d8
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This implements demangling support for the mangling extensions specified in itanium-cxx-abi/cxx-abi#85, much of which is implemented in Clang r359967 and r371004. Specifically, this provides demangling for: * <template-param-decl> in <lambda-sig> * <template-param> with non-zero level * lambda-expression literals (not emitted by Clang yet) * nullptr literals * string literals (The final two seem unrelated, but handling them was necessary in order to disambiguate between lambda expressions and the other forms of literal for which we have a type but no value.) When demangling a <lambda-sig>, we form template parameters with no corresponding argument, so we cannot substitute in the argument in the demangling. Instead we invent synthetic names for the template parameters (eg, '[]<typename $T>($T *x)'). llvm-svn: 371273
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This includes the material from itanium-cxx-abi#47 (non-type template arguments), itanium-cxx-abi#63 (class constants), and the template-param-decl portions of itanium-cxx-abi#85 (C++20 lambda-expressions). @zygoloid gets credit for most of this, although I've made a few substantive changes from his suggestions.
zygoloid
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…aring in its initializer.
This was referenced Jun 28, 2023
zygoloid
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…ears in the signature of a function template.
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This includes the material from itanium-cxx-abi#47 (non-type template arguments), itanium-cxx-abi#63 (class constants), and the template-param-decl portions of itanium-cxx-abi#85 (C++20 lambda-expressions). @zygoloid gets credit for most of this, although I've made a few substantive changes from his suggestions.
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Is it possible to merge this pull request? LLVM already implements the mangling grammar documented here. |
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…ubstitutions These were described in itanium-cxx-abi/cxx-abi#85 and implemented by LLVM. PiperOrigin-RevId: 607555558 Change-Id: I9991ac88c1fcf63b25b93d93977a83ca343cdb5d
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Ping. |
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…ubstitutions These were described in itanium-cxx-abi/cxx-abi#85 and implemented by LLVM. PiperOrigin-RevId: 607555558 Change-Id: I9991ac88c1fcf63b25b93d93977a83ca343cdb5d
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include declarations for explicitly-specified template parameters in
the lambda-sig mangling
add mangling for template parameters at different depths (possible
via generic lambdas in unevaluated operands and via template template
parameters in lambda-sigs)
Fixes #31, #157, #165.