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Minor optimization of enclose_expression.

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This commit is contained in:
Hans-Kristian Arntzen 2017-07-25 18:25:03 +02:00
parent f0c50a618d
commit 0d14448b4d
1 changed files with 16 additions and 13 deletions
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29
spirv_glsl.cpp
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@ -1822,23 +1822,26 @@ string CompilerGLSL::enclose_expression(const string &expr)
need_parens = true;
}
uint32_t paren_count = 0;
for (auto c : expr)
if (!need_parens)
{
if (c == '(')
paren_count++;
else if (c == ')')
uint32_t paren_count = 0;
for (auto c : expr)
{
assert(paren_count);
paren_count--;
}
else if (c == ' ' && paren_count == 0)
{
need_parens = true;
break;
if (c == '(')
paren_count++;
else if (c == ')')
{
assert(paren_count);
paren_count--;
}
else if (c == ' ' && paren_count == 0)
{
need_parens = true;
break;
}
}
assert(paren_count == 0);
}
assert(paren_count == 0);
// If this expression contains any spaces which are not enclosed by parentheses,
// we need to enclose it so we can treat the whole string as an expression.