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translate-c: allow str literals in bool expressions

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this is a follow up to #19610 with fix suggested by Vexu in
https://github.com/ziglang/zig/issues/14642#issuecomment-2048999384
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travisstaloch 2024-04-12 03:10:42 -07:00 committed by GitHub
parent 10ff81c264
commit 05d9755766
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2 changed files with 15 additions and 1 deletions
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8
src/translate_c.zig
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@ -2086,6 +2086,11 @@ fn finishBoolExpr(
} }
}, },
.Pointer => { .Pointer => {
if (node.tag() == .string_literal) {
// @intFromPtr(node) != 0
const int_from_ptr = try Tag.int_from_ptr.create(c.arena, node);
return Tag.not_equal.create(c.arena, .{ .lhs = int_from_ptr, .rhs = Tag.zero_literal.init() });
}
// node != null // node != null
return Tag.not_equal.create(c.arena, .{ .lhs = node, .rhs = Tag.null_literal.init() }); return Tag.not_equal.create(c.arena, .{ .lhs = node, .rhs = Tag.null_literal.init() });
}, },
@ -5794,10 +5799,11 @@ fn macroIntToBool(c: *Context, node: Node) !Node {
return node; return node;
} }
if (node.tag() == .string_literal) { if (node.tag() == .string_literal) {
// @intFromPtr(node) != 0
const int_from_ptr = try Tag.int_from_ptr.create(c.arena, node); const int_from_ptr = try Tag.int_from_ptr.create(c.arena, node);
return Tag.not_equal.create(c.arena, .{ .lhs = int_from_ptr, .rhs = Tag.zero_literal.init() }); return Tag.not_equal.create(c.arena, .{ .lhs = int_from_ptr, .rhs = Tag.zero_literal.init() });
} }
// node != 0
return Tag.not_equal.create(c.arena, .{ .lhs = node, .rhs = Tag.zero_literal.init() }); return Tag.not_equal.create(c.arena, .{ .lhs = node, .rhs = Tag.zero_literal.init() });
} }

8
test/cases/translate_c/strlit_as_bool.c Normal file
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@ -0,0 +1,8 @@
void foo() { if(0 && "error message") {} }
// translate-c
// c_frontend=clang
//
// pub export fn foo() void {
// if (false and (@intFromPtr("error message") != 0)) {}
// }