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532 support negative numbers #872

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Merged
kant2002 merged 6 commits into from
Nov 16, 2025
Merged

532 support negative numbers #872

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556d8a5
add recognize negative number
Oct 13, 2025
b435fe2
fix
Oct 13, 2025
1ba0dcf
fix
Oct 14, 2025
957728c
I changed regexp
Oct 16, 2025
f3ededb
add plus
Oct 16, 2025
911bda4
add tests and plus in UnaryExpression.cs
Oct 19, 2025
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13 changes: 10 additions & 3 deletions Cesium.Parser.Tests/PreprocessorTests/PreprocessorTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -909,13 +909,20 @@ public Task FileDefine() => DoTest(
[InlineData("1 || 0", true)]
[InlineData("1 || 1", true)]

// TODO[#532]: Need to add support for parsing negative numbers, now "-" is recognized as a separator
// [InlineData("-10 < 9", true)]
// [InlineData("-10 > 9", false)]

[InlineData("0b11 == 3", true)]
[InlineData("021 == 17", true)]
[InlineData("0xF == 15", true)]


[InlineData("-10 > 9", false)]
[InlineData("-10 < 9", true)]
[InlineData("-10 < -9", true)]
[InlineData("-9 == -9", true)]
[InlineData("-9 <= -9", true)]
[InlineData("-9 >= 10", false)]
[InlineData(" -10 < 0x10", true)]
[InlineData(" -10 != 0x10", true)]
public async Task EvaluateExpressionAllVariants(
string expression,
bool expectedResult)
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2 changes: 1 addition & 1 deletion Cesium.Preprocessor/ConditionExpressions/BinaryExpression.cs
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Expand Up @@ -48,7 +48,7 @@ public string EvaluateExpression(IMacroContext context)

int Parse(Location location, string macrosValue)
{
if (Regex.IsMatch(macrosValue, $"^(0|[1-9][0-9]*)$"))
if (Regex.IsMatch(macrosValue, $"^(0|-*[1-9][0-9]*)$"))
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@kant2002 kant2002 Oct 16, 2025

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Are --0 allowed in C ?

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@kant2002 kant2002 Oct 16, 2025

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Also we probably should support -0

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@nt-devilboi nt-devilboi Oct 16, 2025

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Yeap, -0 is supported by c.
fix

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@kant2002 kant2002 Oct 16, 2025

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What about +0 ?

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@nt-devilboi nt-devilboi Oct 16, 2025 •
edited
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too.
+-...+-+0 and -+...-+-0 are supported. in these cases the result will be 0.
In other words, the result will always be without a sign.
+-+4 => 4

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@nt-devilboi nt-devilboi Oct 16, 2025

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sorry,
If count of - is even then number otherwise -number

return int.Parse(macrosValue);

if (Regex.IsMatch(macrosValue, "^0b[01]+$"))
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1 change: 1 addition & 0 deletions Cesium.Preprocessor/ConditionExpressions/UnaryExpression.cs
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Expand Up @@ -19,6 +19,7 @@ public string EvaluateExpression(IMacroContext context)
return Operator switch
{
CPreprocessorOperator.Negation => !expressionValue.AsBoolean(Location) ? "1" : "0",
CPreprocessorOperator.Sub => $"-{expressionValue}",
_ => throw new CompilationException($"Operator {Operator} cannot be used in the preprocessor directives")
};
}
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