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from __future__ import annotations
from tatsu.tool import parse
def test_constant_interpolation():
input = '42 69'
grammar = r"""
start = a:number b: number i:`"seen: {a}, {b}"` $ ;
number = /\d+/ ;
"""
assert parse(grammar, input) == {'a': '42', 'b': '69', 'i': 'seen: 42, 69'}
def test_constant_interpolation_free():
input = '42 69'
grammar = r"""
start = a:number b: number i:`seen: {a}, {b}` $ ;
number = /\d+/ ;
"""
assert parse(grammar, input) == {'a': '42', 'b': '69', 'i': 'seen: 42, 69'}
def test_constant_interpolation_multiline():
input = '42 69'
grammar = r"""
start = a:number b: number
i:```
seen:
{a}
{b}
``` $ ;
number = /\d+/ ;
"""
result = parse(grammar, input)
print(result)
assert result == {'a': '42', 'b': '69', 'i': 'seen:\n42\n69\n'}
def test_evaluate_constant():
grammar = """
@@grammar :: constants
start = int bool str null 'a' $;
int = `42` ;
bool = `True` ;
str = `Something` ;
null = `None` ;
"""
ast = parse(grammar, 'a')
assert ast == (42, True, 'Something', None, 'a')
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