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translate-c-2 macro conditional operator

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Vexu 2019-12-28 22:32:18 +02:00
parent 68aa221995
commit aea46dcd7e
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3 changed files with 28 additions and 0 deletions
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10
src-self-hosted/c_tokenizer.zig
View File

@ -31,6 +31,8 @@ pub const CToken = struct {
LBrace,
RBrace,
Pipe,
QuestionMark,
Colon,
};
pub const NumLitSuffix = enum {
@ -365,6 +367,14 @@ fn next(chars: [*:0]const u8, i: *usize) !CToken {
result.id = .Pipe;
state = .Done;
},
'?' => {
result.id = .QuestionMark;
state = .Done;
},
':' => {
result.id = .Colon;
state = .Done;
},
else => return error.TokenizingFailed,
}
},

12
src-self-hosted/translate_c.zig
View File

@ -4545,6 +4545,18 @@ fn parseCSuffixOpExpr(rp: RestorePoint, it: *ctok.TokenList.Iterator, source_loc
call_node.rtoken = try appendToken(rp.c, .RParen, ")");
node = &call_node.base;
},
.QuestionMark => {
// must come immediately after expr
_ = try appendToken(rp.c, .RParen, ")");
const if_node = try transCreateNodeIf(rp.c);
if_node.condition = node;
if_node.body = try parseCPrimaryExpr(rp, it, source_loc, scope);
if (it.next().?.id != .Colon)
return error.ParseError;
if_node.@"else" = try transCreateNodeElse(rp.c);
if_node.@"else".?.body = try parseCPrimaryExpr(rp, it, source_loc, scope);
node = &if_node.base;
},
else => {
_ = it.prev();
return node;

6
test/translate_c.zig
View File

@ -2192,6 +2192,12 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
\\}
});
cases.add_2("macro conditional operator",
\\#define FOO a ? b : c
, &[_][]const u8{
\\pub const FOO = if (a) b else c;
});
/////////////// Cases for only stage1 because stage2 behavior is better ////////////////
cases.addC("Parameterless function prototypes",
\\void foo() {}