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https://github.com/carbon-language/carbon-lang.git
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Dave AbrahamsandGeoff Romer
07a37933c6
Slowly bringing this into line with Bison's C++ example parser so we can use strong semantic values for symbols rather than leaking pointers. First step is to thread a `ParseAndLexContext` object through the whole syntactic analysis state, like the example has. In the example, it's called `driver`. Co-authored-by: Geoff Romer <gromer@google.com>
71 lines
1.9 KiB
Python
71 lines
1.9 KiB
Python
# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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# Exceptions. See /LICENSE for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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# TODO(https://github.com/carbon-language/carbon-lang/issues/266):
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# Migrate bison/flex usage to a more hermetic bazel build.
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load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
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package(default_visibility = ["//executable_semantics:__subpackages__"])
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cc_library(
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name = "syntax",
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srcs = [
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"lexer.cpp",
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"parse.cpp",
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"parse_and_lex_context.cpp",
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"parse_and_lex_context.h",
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"parser.cpp",
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"parser.h",
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"syntax_helpers.cpp",
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"syntax_helpers.h",
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],
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hdrs = [
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"parse.h",
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],
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# Disable warnings for generated code.
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copts = [
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"-Wno-unneeded-internal-declaration",
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"-Wno-unused-function",
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"-Wno-writable-strings",
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],
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deps = [
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"//executable_semantics:tracing_flag",
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"//executable_semantics/ast:declaration",
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"//executable_semantics/ast:expression",
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"//executable_semantics/ast:field_list",
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"//executable_semantics/interpreter",
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],
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)
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genrule(
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name = "syntax_bison_srcs",
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srcs = ["parser.ypp"],
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outs = [
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"parser.cpp",
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"parser.h",
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],
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cmd = "M4=$(M4) $(BISON) " +
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"--output=$(location parser.cpp) " +
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"--defines=$(location parser.h) " +
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"$(location parser.ypp)",
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toolchains = [
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"@rules_bison//bison:current_bison_toolchain",
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"@rules_m4//m4:current_m4_toolchain",
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],
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)
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genrule(
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name = "syntax_flex_srcs",
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srcs = ["lexer.lpp"],
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outs = ["lexer.cpp"],
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cmd = "M4=$(M4) $(FLEX) " +
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"--outfile=$(location lexer.cpp) " +
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"$(location lexer.lpp)",
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toolchains = [
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"@rules_flex//flex:current_flex_toolchain",
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"@rules_m4//m4:current_m4_toolchain",
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],
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)
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