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Create new parser (works for lists so far)

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Bartłomiej Pluta
2019-07-05 16:45:59 +02:00
parent 23e0f3f33e
commit ed73aa1ad1
32 changed files with 516 additions and 59 deletions
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12
smnp/ast/parsers/list.py
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@@ -1,17 +1,17 @@
from smnp.ast.node.list import ListNode, ListItemNode, CloseListNode
from smnp.ast.parsers.expression import parseExpression
from smnp.ast.tools import rollup, assertToken
from smnp.ast.tools import greedy, assertToken
from smnp.token.type import TokenType
# list -> CLOSE_PAREN | expr listTail
def parseList(input, parent):
if input.current().type == TokenType.OPEN_PAREN:
if input.isCurrent(TokenType.OPEN_PAREN):
node = ListNode(parent, input.current().pos)
input.ahead()
# list -> CLOSE_PAREN (end of list)
if input.hasCurrent() and input.current().type == TokenType.CLOSE_PAREN:
if input.isCurrent(TokenType.CLOSE_PAREN):
close = CloseListNode(node, input.current().pos)
node.append(close)
input.ahead()
@@ -20,7 +20,7 @@ def parseList(input, parent):
# list -> expr listTail
if input.hasCurrent():
token = input.current()
expr = parseExpression(input, node)
expr = greedy(parseExpression)(input, parent)
item = ListItemNode(expr, node, token.pos)
expr.parent = item
node.append(item)
@@ -33,7 +33,7 @@ def parseList(input, parent):
# listTail -> COMMA expr listTail | CLOSE_PAREN
def parseListTail(input, parent):
# listTail -> CLOSE_PAREN
if input.hasCurrent() and input.current().type == TokenType.CLOSE_PAREN:
if input.isCurrent(TokenType.CLOSE_PAREN):
close = CloseListNode(parent, input.current().pos)
input.ahead()
return close
@@ -42,7 +42,7 @@ def parseListTail(input, parent):
if input.hasCurrent() and input.hasMore():
assertToken(TokenType.COMMA, input)
input.ahead()
expr = rollup(parseExpression)(input, parent)
expr = greedy(parseExpression)(input, parent)
if expr is not None:
item = ListItemNode(expr, parent, expr.pos)
expr.parent = item