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lexer: add test checks for numeric literal edge cases

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When an integer JSON token exceeds the range of the underlying 64-bit
unsigned/integer types, the lexer instead identifies the token type as
`value_float`. When the value exceeds the range of the underlying
floating-point type, the token type remains as `value_float`.

This was previously not tested explicitly for the edge case values and
subtly breaking this behavior right around the edge case was not caught
by any other test.

Signed-off-by: Jonas Greitemann <jgreitemann@gmail.com>
This commit is contained in:
Jonas Greitemann
2026-07-12 18:47:51 +02:00
parent 0bc01a066c
commit 6fb162a394
1 changed files with 7 additions and 0 deletions
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tests/src/unit-class_lexer.cpp
+7
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@@ -65,13 +65,20 @@ TEST_CASE("lexer class")
CHECK((scan_string("7") == json::lexer::token_type::value_unsigned));
CHECK((scan_string("8") == json::lexer::token_type::value_unsigned));
CHECK((scan_string("9") == json::lexer::token_type::value_unsigned));
CHECK((scan_string("18446744073709551615") == json::lexer::token_type::value_unsigned));
CHECK((scan_string("-0") == json::lexer::token_type::value_integer));
CHECK((scan_string("-1") == json::lexer::token_type::value_integer));
CHECK((scan_string("-9223372036854775808") == json::lexer::token_type::value_integer));
CHECK((scan_string("1.1") == json::lexer::token_type::value_float));
CHECK((scan_string("-1.1") == json::lexer::token_type::value_float));
CHECK((scan_string("1E10") == json::lexer::token_type::value_float));
// out-of-range integers/floats are treated as value_float tokens
CHECK((scan_string("18446744073709551616") == json::lexer::token_type::value_float));
CHECK((scan_string("-9223372036854775809") == json::lexer::token_type::value_float));
CHECK((scan_string("1E400") == json::lexer::token_type::value_float));
}
SECTION("whitespace")