1 files changed, 46 insertions, 0 deletions
diff --git a/tests/calclex.py b/tests/calclex.py
new file mode 100644
index 0000000..4862753
--- /dev/null
+++ b/tests/calclex.py
@@ -0,0 +1,46 @@
+# -----------------------------------------------------------------------------
+# calclex.py
+# -----------------------------------------------------------------------------
+import ply.lex as lex
+
+tokens = (
+    'NAME','NUMBER',
+    'PLUS','MINUS','TIMES','DIVIDE','EQUALS',
+    'LPAREN','RPAREN',
+    )
+
+# Tokens
+
+t_PLUS    = r'\+'
+t_MINUS   = r'-'
+t_TIMES   = r'\*'
+t_DIVIDE  = r'/'
+t_EQUALS  = r'='
+t_LPAREN  = r'\('
+t_RPAREN  = r'\)'
+t_NAME    = r'[a-zA-Z_][a-zA-Z0-9_]*'
+
+def t_NUMBER(t):
+    r'\d+'
+    try:
+        t.value = int(t.value)
+    except ValueError:
+        print("Integer value too large %s" % t.value)
+        t.value = 0
+    return t
+
+t_ignore = " \t"
+
+def t_newline(t):
+    r'\n+'
+    t.lexer.lineno += t.value.count("\n")
+    
+def t_error(t):
+    print("Illegal character '%s'" % t.value[0])
+    t.lexer.skip(1)
+    
+# Build the lexer
+lexer = lex.lex()
+
+
+