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Jon Meow
6e5070de18
Notes versus what jsiek wrote:
- This adopts Bazel for building.
- System-local versions of bison/flex are used. I found https://github.com/jmillikin/rules_bison, but those print a lot of warnings (things like -Wsign-compare IIRC) which makes builds hard to read. Plus I think the underlying bison_cc_library rule didn't work, so this would really only get a hermetic bison/flex build (helpful, but didn't seem worth more time).
- I'm adding in a .bazeliskrc to push a somewhat more standard choice of bazel versions. I noticed I was getting unstable versions by default, possible Google-specific, but seemed good to include.
- The `-lpthread` kludge.
- Turn all of the examples into golden tests.
- Including adding a golden test rule.
- Fixed various style guide issues. For example:
- Fixing function names to be CamelCase instead of snake_case (https://google.github.io/styleguide/cppguide.html#Function_Names)
- Removed exception use (https://google.github.io/styleguide/cppguide.html#Exceptions)
- File name fixes (https://github.com/carbon-language/carbon-lang/blob/trunk/docs/project/cpp_style_guide.md#file-names)
- Dropped `using` of `std` names -- I believe this is preferred (maybe we should be explicit about this in the Carbon style guide)
- Switched `enum` uses to `enum class` for ease-of-identification.
- Spent some time breaking out files to hopefully be easier to read/edit pieces, and understand relations between structs.
- Added `code requires` to `syntax.ypp` to address include issues
Possibly other things -- but the fundamental structure is, I believe, unchanged. I put in the golden tests pretty early to ensure I wasn't mutating output/results.
91 lines
1.8 KiB
Plaintext
91 lines
1.8 KiB
Plaintext
/*
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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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*/
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%{
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#include <cstdlib>
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#include "executable_semantics/syntax.tab.h"
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%}
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%option yylineno
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AND "and"
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ARROW "->"
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AUTO "auto"
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BOOL "Bool"
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BREAK "break"
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CASE "case"
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CHOICE "choice"
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COMMENT \/\/[^\n]*\n
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CONTINUE "continue"
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DBLARROW "=>"
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DEFAULT "default"
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ELSE "else"
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EQUAL "=="
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FALSE "false"
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FN "fn"
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FNTY "fnty"
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IF "if"
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INT "Int"
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MATCH "match"
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NOT "not"
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OR "or"
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RETURN "return"
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STRUCT "struct"
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TRUE "true"
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TYPE "Type"
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VAR "var"
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WHILE "while"
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identifier [A-Za-z_][A-Za-z0-9_]*
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integer_literal [0-9]+
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%%
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{AND} { return AND; }
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{ARROW} { return ARROW; }
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{AUTO} { return AUTO; }
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{BOOL} { return BOOL; }
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{BREAK} { return BREAK; }
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{CASE} { return CASE; }
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{CHOICE} { return CHOICE; }
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{COMMENT} ;
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{CONTINUE} { return CONTINUE; }
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{DBLARROW} { return DBLARROW; }
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{DEFAULT} { return DEFAULT; }
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{ELSE} { return ELSE; }
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{EQUAL} { return EQUAL; }
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{FALSE} { return FALSE; }
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{FN} { return FN; }
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{FNTY} { return FNTY; }
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{IF} { return IF; }
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{INT} { return INT; }
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{MATCH} { return MATCH; }
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{NOT} { return NOT; }
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{OR} { return OR; }
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{RETURN} { return RETURN; }
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{STRUCT} { return STRUCT; }
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{TRUE} { return TRUE; }
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{TYPE} { return TYPE; }
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{VAR} { return VAR; }
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{WHILE} { return WHILE; }
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{identifier} {
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int n = strlen(yytext);
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yylval.str = reinterpret_cast<char*>(malloc((n + 1) * sizeof(char)));
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strncpy(yylval.str, yytext, n + 1);
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return identifier;
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}
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{integer_literal} {
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yylval.num = atof(yytext);
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return integer_literal;
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}
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[ \t\n]+ ;
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. { return yytext[0]; }
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%%
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int yywrap() { return 1; }
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