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OnlyCheckWhitespaceInsideParenthesis Fixes #5863 #5868

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merged 8 commits into from
Nov 11, 2020
Merged

OnlyCheckWhitespaceInsideParenthesis Fixes #5863 #5868

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ff68e80
Only check whitespace inside parenthesis
Forgind Nov 6, 2020
e9bce0b
Only check first and last parenthesis
Forgind Nov 6, 2020
ea47c80
Add test
Forgind Nov 6, 2020
e1e5926
Account for non-zero starting index
Forgind Nov 6, 2020
2984301
Scans for a property with a space and no non-ID chars
Forgind Nov 6, 2020
51b0232
Cleaner check
Forgind Nov 6, 2020
dd8a689
Apply suggestions from code review
Forgind Nov 6, 2020
78cf00a
Add relevant test
Forgind Nov 11, 2020
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21 changes: 12 additions & 9 deletions src/Build/Evaluation/Conditionals/Scanner.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -321,36 +321,39 @@ private string ParsePropertyOrItemMetadata()
private static bool ScanForPropertyExpressionEnd(string expression, int index, out int indexResult)
{
int nestLevel = 0;
bool whitespaceCheck = false;

unsafe
{
fixed (char* pchar = expression)
{
if (expression.Length > 1 && pchar[0] == '(' && char.IsWhiteSpace(pchar[1]) && ChangeWaves.AreFeaturesEnabled(ChangeWaves.Wave16_10))
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is the first character in the expression guaranteed to be a '('?

Should this maybe move under the `if (character == '(')?

Something like:

                        if (character == '(')
                        {
                             if (nestLevel == 0 && index + 1 > expression.Length && pchar[index + 1] == '(' && char.IsWhiteSpace(pchar[1]) && ChangeWaves.AreFeaturesEnabled(ChangeWaves.Wave16_10))
                              {
                                    indexResult = 1;
                                     return false;
                              }
                            nestLevel++;
                        }

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Yes

{
indexResult = 1;
return false;
}

while (index < expression.Length)
{
char character = pchar[index];
if (character == '(')
{
nestLevel++;
whitespaceCheck = true;
}
else if (character == ')')
{
nestLevel--;
whitespaceCheck = false;
}
else if (whitespaceCheck && char.IsWhiteSpace(character) && ChangeWaves.AreFeaturesEnabled(ChangeWaves.Wave16_10))
{
indexResult = index;
return false;
}

// We have reached the end of the parenthesis nesting
// this should be the end of the property expression
// If it is not then the calling code will determine that
if (nestLevel == 0)
{
if (index > 0 && char.IsWhiteSpace(pchar[index - 1]) && ChangeWaves.AreFeaturesEnabled(ChangeWaves.Wave16_10))
{
indexResult = index - 1;
return false;
}

indexResult = index;
return true;
}
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