89cd0e8c26
This patch allows users to evaluate expressions using `expr -l c++20`. Currently DWARF keeps the CU's at `DW_AT_language` at `DW_LANG_C_plus_plus_14` even when compiling with `-std=c++20`. So even in "C++20 programs" expression evaluation will by default be performed in `C++11` mode for now. Enabling `C++14` has been previously attempted at https://reviews.llvm.org/D80308 There are some remaining issues around evaluating C++20 expressions. Mainly, lack of support for C++20 AST nodes in `clang::ASTImporter`. But these can be addressed in follow-up patches.
17 lines
627 B
Python
17 lines
627 B
Python
import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class TestCPP20Standard(TestBase):
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def test_cpp20(self):
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"""
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Tests that we can evaluate an expression in C++20 mode
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"""
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self.build()
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lldbutil.run_to_source_breakpoint(self, "Foo{}", lldb.SBFileSpec("main.cpp"))
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self.expect("expr -l c++11 -- Foo{} <=> Foo{}", error=True, substrs=["'<=>' is a single token in C++20; add a space to avoid a change in behavior"])
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self.expect("expr -l c++20 -- Foo{} <=> Foo{}", substrs=["(bool) $0 = true"])
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