Compiler/AST interpreter: Difference between revisions
Content added Content deleted
m (made da_redim - use do while for macros, to avoid potential problems.) |
m (Fix C-like division: it always truncates towards 0.) |
||
| Line 72: | Line 72: | ||
Because of the simple nature of our tiny language, Semantic analysis is not needed. |
Because of the simple nature of our tiny language, Semantic analysis is not needed. |
||
Your interpreter should use C like division semantics, for both division and modulus. For |
Your interpreter should use C like division semantics, for both division and modulus. For division of positive operands, only the non-fractional portion of the result should be returned. In other words, the result should be truncated towards 0. |
||
division of positive operands, only the non-fractional portion of the result should be |
|||
returned. In other words, the result should be truncated towards 0. |
|||
This means, for instance, that 3 / 2 should result in 1. |
This means, for instance, that 3 / 2 should result in 1. |
||
For division when one of the operands is negative, the result should be truncated |
For division when one of the operands is negative, the result should be truncated towards 0. |
||
from 0. |
|||
This means, for instance, that 3 / -2 should result in -1. |
This means, for instance, that 3 / -2 should result in -1. |
||