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Diffstat (limited to 'chapter03')
| -rw-r--r-- | chapter03/README.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/chapter03/README.md b/chapter03/README.md index ce5901ce..799d8c0a 100644 --- a/chapter03/README.md +++ b/chapter03/README.md @@ -65,9 +65,9 @@ A ScopeNode encapsulates the stack of symbol tables that are used to implement l * In [Chapter 5](../chapter05/README.md) when we implement branches, the ScopeNode gets duplicated at a branch point and then gets merged when the branch joins. This allows the names to evolve in each branch independently. At the merge point, names that have diverged require a Phi node. * In [Chapter 7](../chapter07/README.md) additional logic is deployed for handling Phis from back edges. -* The ScopeNode is used to track some other values such as the Control token starting from [Chapter 4](../chapter04/README.md), and whole memory starting from [Chapter 10a](../chapter10a/README.md). Special name bindings are used +* The ScopeNode is used to track some other values such as the Control token starting from [Chapter 4](../chapter04/README.md), and whole memory starting from [Chapter 10](../chapter10/README.md). Special name bindings are used for these, and each name is tracked across branches and then merged at merge points. -* In [Chapter 10a](../chapter10a/README.md) the ScopeNode is enhanced to also maintain the declared type for each name. +* In [Chapter 10](../chapter10/README.md) the ScopeNode is enhanced to also maintain the declared type for each name. From an implementation standpoint, each symbol table is represented as a `HashMap<String,Integer>`, where the `String` is the variable name, and the `Integer` is an index into the inputs of the ScopeNode. To access the Node associated with a name, first the symbol table is consulted, and then the ScopeNode's inputs to find the required Node. |