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Function std.algorithm.searching.balancedParens
Checks whether rall instances
of lParrParmaxNestingLevel0. In the latter case, no
nesting is allowed.
Prototype
bool balancedParens(Range, E)( Range r, E lPar, E rPar, size_t maxNestingLevel = size_t.max ) if (isInputRange!Range && is(typeof(r.front == lPar)));
Example
auto s = "1 + (2 * (3 + 1 / 2)";
assert(!balancedParens(s, '(', ')'));
s = "1 + (2 * (3 + 1) / 2)";
assert(balancedParens(s, '(', ')'));
s = "1 + (2 * (3 + 1) / 2)";
assert(!balancedParens(s, '(', ')', 0));
s = "1 + (2 * 3 + 1) / (2 - 5)";
assert(balancedParens(s, '(', ')', 0));