mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-27 17:20:11 +01:00
Adrien Leravat
d0645c6a85
Rename value categories to expression categories based on [Discord discussion](https://discord.com/channels/655572317891461132/753021843459538996/1092924035517665332) regarding naming and behavior. >* let expression -> value expression >* var expression -> reference expression >* located expression -> initializing expression >So: >- "value expressions" produce values (with no associated location). "reference expressions" produce a location of an existing value. "initializing expressions" take a location and initialize it. >- A let binding is initialized by a value expression, because lets represent values (with category conversions performed as needed, but if a conversion is performed from a different category of expression, the value of the object is pinned for the lifetime of the let). >- A var binding is initialized by an initializing expression, without performing a copy (with category conversions performed as needed, calling a copy constructor if the initializer is a different expression category). >- The & operator requires a reference expression, and it's an error to give it other kinds. >- The left-hand side of . requires a value expression when calling a function with a non-addr receiver, and requires a reference expression when calling a function with an addr receiver (it's an error to give it a value expression, and for an initializing expression, a temporary is materialized). Changes * Rename "value category" to "expression category" * Rename Var and Let value categories to Value, Reference, and Initializing expression * Rename `lvalue` to `location` (most of the time)
152 lines
3.5 KiB
Python
152 lines
3.5 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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package(default_visibility = [
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"//explorer:__pkg__",
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"//explorer/fuzzing:__pkg__",
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])
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cc_library(
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name = "bison_wrap",
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hdrs = ["bison_wrap.h"],
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deps = ["//common:check"],
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)
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cc_test(
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name = "parse_test",
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srcs = ["parse_test.cpp"],
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deps = [
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":syntax",
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"//common:gtest_main",
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"//explorer/common:arena",
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"@com_google_googletest//:gtest",
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],
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)
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cc_library(
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name = "parse_test_matchers",
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testonly = 1,
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srcs = ["parse_test_matchers_internal.h"],
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hdrs = ["parse_test_matchers.h"],
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deps = [
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":syntax",
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"@com_google_googletest//:gtest",
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"@llvm-project//llvm:Support",
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],
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)
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cc_library(
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name = "prelude",
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srcs = ["prelude.cpp"],
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hdrs = ["prelude.h"],
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data = ["//explorer:standard_libraries"],
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deps = [
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":syntax",
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"//common:error",
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"//explorer/ast",
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"//explorer/common:arena",
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"//explorer/common:nonnull",
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],
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)
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cc_library(
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name = "syntax",
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srcs = [
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"lex_helper.h",
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"lex_scan_helper.cpp",
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"lex_scan_helper.h",
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"lexer.cpp",
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"lexer.h",
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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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],
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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-implicit-fallthrough", # Needed to make yyinput() code compile.
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"-Wno-unneeded-internal-declaration",
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"-Wno-unused-but-set-variable",
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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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":bison_wrap",
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"//common:check",
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"//common:error",
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"//common:ostream",
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"//common:string_helpers",
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"//explorer/ast",
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"//explorer/ast:expression_category",
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"//explorer/ast:paren_contents",
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"//explorer/common:arena",
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"//explorer/common:error_builders",
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"//explorer/common:nonnull",
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"@llvm-project//llvm:Support",
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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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"parser.output",
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],
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cmd = "M4=$(M4) $(BISON) " +
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"--output=$(location parser.cpp) " +
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"--report=state " +
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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 = [
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"lexer.cpp",
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"lexer.h",
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],
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cmd = "M4=$(M4) $(FLEX) " +
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"--outfile=$(location lexer.cpp) " +
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"--header-file=$(location lexer.h) " +
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"$(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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py_library(
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name = "format_grammar_lib",
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srcs = ["format_grammar.py"],
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)
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py_test(
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name = "format_grammar_test",
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srcs = ["format_grammar_test.py"],
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deps = ["format_grammar_lib"],
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)
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cc_test(
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name = "unimplemented_example_test",
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srcs = ["unimplemented_example_test.cpp"],
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deps = [
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":parse_test_matchers",
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":syntax",
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"//common:gtest_main",
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"//explorer/ast:ast_test_matchers",
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"@com_google_googletest//:gtest",
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],
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)
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