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| author | Hugo <hugo.hornquist@gmail.com> | 2016-05-09 18:35:49 +0200 |
|---|---|---|
| committer | Hugo <hugo.hornquist@gmail.com> | 2016-05-09 18:35:49 +0200 |
| commit | f6b3d28ba49aebd644f1849a78a98eb28655469f (patch) | |
| tree | f1a17987b0999bab95cc6ee641ec0cda6a589977 | |
| parent | now returns #f if given an invalid expression (diff) | |
| download | math-parse-f6b3d28ba49aebd644f1849a78a98eb28655469f.tar.gz math-parse-f6b3d28ba49aebd644f1849a78a98eb28655469f.tar.xz | |
added small comment about what an invalid expression is
| -rw-r--r-- | math-parser.scm | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/math-parser.scm b/math-parser.scm index b9ef4b9..1006926 100644 --- a/math-parser.scm +++ b/math-parser.scm @@ -61,5 +61,7 @@ ; in order, from outermost to innermost. (let* ((expr (string->list str)) (trace ((create-trace expr '(#\+ #\- #\* #\/ #\^)) expr))) + ; If any operator is more than once in a row in the input, then a element becomes false + ; This makes the function return false if any of the inputs are false (if (contains-false? trace) #f trace))) |