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carbon-lang
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executable_semantics
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syntax
Jeremy G. Siek 7cce1bd124 interfaces, impls, and constrained generics (basics) (#1073) 4 年 前
..
BUILD 2017eb4da0 Initial implementation of block string literals following lexical_conventions/string_literals.md. (#1028) 4 年 前
README.md 6c3e1f6d7c Revise README and add subdir READMEs (#1023) 4 年 前
bison_wrap.h 057b9fe253 Clean up remaining executable_semantics clang-tidy warnings (#906) 4 年 前
format_grammar.py 2017eb4da0 Initial implementation of block string literals following lexical_conventions/string_literals.md. (#1028) 4 年 前
format_grammar_test.py ffc2be92d6 Add carbon to a couple python imports for correctness (#1033) 4 年 前
lexer.lpp 7cce1bd124 interfaces, impls, and constrained generics (basics) (#1073) 4 年 前
parse.cpp ec2f8e64e2 Support parsing Carbon files from strings. (#954) 4 年 前
parse.h ec2f8e64e2 Support parsing Carbon files from strings. (#954) 4 年 前
parse_and_lex_context.cpp 70797e8bf8 Mass rename SourceLoc and Tag (#860) 4 年 前
parse_and_lex_context.h 2017eb4da0 Initial implementation of block string literals following lexical_conventions/string_literals.md. (#1028) 4 年 前
parse_test.cpp eda43faa5a Note namespace and static recommendations in C++ style guide (#1041) 4 年 前
parse_test_matchers.h dc5e62fc7a Support parsing and testing unimplemented expressions (#957) 4 年 前
parse_test_matchers_internal.h 92903afbd5 clang-tidy pass on executable_semantics (#963) 4 年 前
parser.ypp 7cce1bd124 interfaces, impls, and constrained generics (basics) (#1073) 4 年 前
unimplemented_example_test.cpp eda43faa5a Note namespace and static recommendations in C++ style guide (#1041) 4 年 前

README.md

The code in this directory is responsible for translating Carbon source code to the AST defined in ast. It consists primarily of a Flex lexer defined in lexer.lpp and a Bison grammar defined in parser.ypp.

It is possible to define and test a new expression syntax without defining its semantics by using the UnimplementedExpression AST node type and the same techniques can be applied to other kinds of AST nodes as needed. See the handling of the UNIMPL_EXAMPLE token for an example of how this is done, and see unimplemented_example_test.cpp for an example of how to test it.