[GiNaC-devel] [PATCH] Change input parser to accept pow(x, y) and power(x, y).

[Alexei Sheplyakov]

so 

symbol x("x");
lst syms(x);
ex("pow(x, 2)", syms);

does NOT trigger parser error any more.

---
 ginac/input_parser.yy |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/ginac/input_parser.yy b/ginac/input_parser.yy
index 8601524..74beb4c 100644
--- a/ginac/input_parser.yy
+++ b/ginac/input_parser.yy
@@ -105,6 +105,10 @@ exp	: T_NUMBER		{$$ = $1;}
 			if ($3.nops() != 1)
 				throw (std::runtime_error("too many arguments to sqrt()"));
 			$$ = sqrt($3.op(0));
+		} else if (n == "pow" || n == "power") {
+		  if ($3.nops() != 2) 
+			  throw std::invalid_argument("wrong number of arguments to pow()");
+			$$ = power($3.op(0), $3.op(0));
 		} else {
 			unsigned i = function::find_function(n, $3.nops());
 			$$ = function(i, ex_to<exprseq>($3)).eval(1);
-- 
1.4.4.4

Best regards,
 Alexei

-- 
All science is either physics or stamp collecting.

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