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fix nil exceptions with incomplete code parse

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This makes the parser more fault tolerant because the different
parse_foo procs return nil when in an invalid state, which is fine most
of the time but when creating a node it would crash accessing its
position.
This commit is contained in:
Laytan Laats
2023-11-12 01:53:14 +01:00
parent 70c1f9d0e1
commit bd19081543
2 changed files with 61 additions and 48 deletions
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11
core/odin/ast/clone.odin
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@@ -7,7 +7,7 @@ import "core:reflect"
import "core:odin/tokenizer"
_ :: intrinsics
new :: proc($T: typeid, pos, end: tokenizer.Pos) -> ^T {
new_from_positions :: proc($T: typeid, pos, end: tokenizer.Pos) -> ^T {
n, _ := mem.new(T)
n.pos = pos
n.end = end
@@ -23,6 +23,15 @@ new :: proc($T: typeid, pos, end: tokenizer.Pos) -> ^T {
return n
}
new_from_pos_and_end_node :: proc($T: typeid, pos: tokenizer.Pos, end: ^Node) -> ^T {
return new(T, pos, end != nil ? end.end : {})
}
new :: proc {
new_from_positions,
new_from_pos_and_end_node,
}
clone :: proc{
clone_node,
clone_expr,