AST matcher for Pharo AST
# AST Matcher
AST matcher for Pharo AST
## Installation
```smalltalk
Metacello new
baseline: 'ASTMatcher';
repository: 'github://aranega/ast-matcher:main';
load
```
## Usage (will evolve, change)
```smalltalk
"will try to match if a node is a return node with the expression x + x - x"
m := [ ^ #'@a' + #'@a' - #'@a' ] matcher at: 1.
m match: node. "node is an AST node"
"will try to match a return with the following form ^ (a) + (a) (operator) (mavar) "
m := ReturnMatcher with: (BinopMatcher op: (NodeMatcher name: #operator)
left: ([ #'@a' + #'@a' ] matcher at: 1)
right: (NodeMatcher name: #mavar)).
"or"
m := [ ^ #'@a' + #'@a' @* #'@mavar' ] matcher at: 1.
m match: node. "applied on an AST node ^ z + z - b"
"will fully match and return { #a -> VariableNode(z). #operator -> #+. #mavar -> VariableNode(b) }"
m match: node. "applied on an AST node ^ z + a - b"
"will not fully match but patially match { #a -> VariableNode(z). #operator -> #+ }"
m match: node. "applied on an AST node ^ z + a - b"
"will not fully match but patially match { #a -> VariableNode(z). #operator -> #+ }"
```
## Documentation
**soon**