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| author | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2015-07-22 01:40:53 +0200 |
|---|---|---|
| committer | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2015-07-22 01:40:53 +0200 |
| commit | efa862d4f89401c5148746a5aba4d88ed6b6cbaa (patch) | |
| tree | 22afe953b54b4b0fc6f80f0aef80c4ae45b8f3be /src/expressions.h | |
| parent | 91f29f5b146453e67e15f8e91571b0f806526d1f (diff) | |
| download | sciteco-efa862d4f89401c5148746a5aba4d88ed6b6cbaa.tar.gz | |
fixed operator precedence list
* necessary since in SciTECO every operator has a different
precedence. E.g. successive additions/subtractions cannot
be evaluated from left to right (by their associativity).
Perhaps this should be changed.
* subtraction must have a higher precedence than addition,
since (a+b)-c == a+(b-c)
* division must have a higher precedence than multiplication
since (a*b)/c == a*(b/c).
This is not quite true for integer arithmetics.
* this fixes expressions like 5-1+1 which were counterintuitively
evaluated like 5-(1+1)
Diffstat (limited to 'src/expressions.h')
| -rw-r--r-- | src/expressions.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/expressions.h b/src/expressions.h index a0e2908..f97ec1c 100644 --- a/src/expressions.h +++ b/src/expressions.h @@ -159,11 +159,11 @@ public: enum Operator { OP_NIL = 0, OP_POW, // ^* - OP_MUL, // * - OP_DIV, // / OP_MOD, // ^/ - OP_ADD, // + + OP_DIV, // / + OP_MUL, // * OP_SUB, // - + OP_ADD, // + OP_AND, // & OP_XOR, // ^# OP_OR, // # |