Files
Anand Krishnamoorthi 444b2970a1 feat!: Indexes for nodes in the AST (#414)
Indexes allow associating extra data with nodes in the AST
using an array and then quickly looking up the array to fetch
the extra data.

- Index eidx for expressions
- Index sidx for statements
- Index qidx for queries.

AST nodes are not cloneable. Therefore once a module is created,
it is not possible to accidentally create two nodes with the same
index inadvertently via clone.

Also added IndexChecker in debug builds. When a module is parsed,
it will assert that indexes have been constructed correctly.

AST Cleanup
- Make literal expressions (null, val, number, string etc) also structs
  to match all other expressions
- Merge True and False nodes into a single Bool node.

Also update dependencies.

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
2025-06-20 15:09:07 -05:00

54 lines
1.3 KiB
YAML

# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
cases:
- note: basic
rego: |
package test
# bool ops have lower precedence than arithmetic operators
x = 1 + 2 > 3 - 2
# TODO: lock down
# different types against object
# different types against set
# strings etc
num_expressions: 9
num_queries: 0
num_statements: 0
policy:
- spec:
head:
compr:
refr:
var: x
eidx: 1
assign:
op: =
value:
boolexpr:
op: ">"
lhs:
arithexpr:
op: "+"
lhs:
number: 1
eidx: 2
rhs:
number: 2
eidx: 3
eidx: 4
rhs:
arithexpr:
op: "-"
lhs:
number: 3
eidx: 5
rhs:
number: 2
eidx: 6
eidx: 7
eidx: 8
bodies: []