Fix parsing of {<,>}=. (bug report by damiendrix) Fix issue #1.

pymbolic/parser.py

@@ -45,10 +45,12 @@ class Parser:
     lex_table = [
             (_equal, pytools.lex.RE(r"==")),
             (_notequal, pytools.lex.RE(r"!=")),
-            (_less, pytools.lex.RE(r"\<")),
+
             (_lessequal, pytools.lex.RE(r"\<=")),
-            (_greater, pytools.lex.RE(r"\>")),
             (_greaterequal, pytools.lex.RE(r"\>=")),
+            # must be before
+            (_less, pytools.lex.RE(r"\<")),
+            (_greater, pytools.lex.RE(r"\>")),
 
             (_and, pytools.lex.RE(r"and")),
             (_or, pytools.lex.RE(r"or")),

test/test_pymbolic.py

@@ -138,6 +138,9 @@ def test_parser():
     print repr(parse("d4knl0"))
     print repr(parse("0."))
     print repr(parse("0.e1"))
+    print repr(parse("0.e1"))
+    print repr(parse("a >= 1"))
+    print repr(parse("a <= 1"))