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Fix multiline RegEx iteration

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In `.Multiline` mode:

- `^` is now defined to assert the start of the string or that a "\n" or
  "\r" rune was parsed on last VM dispatch.

- `$` is now defined to consume a newline sequence of "\n", "\r", or
  "\r\n" or to assert the end of the string.
This commit is contained in:
Feoramund
2025-05-26 14:48:45 -04:00
parent 4f7ed35435
commit 35b157ac83
6 changed files with 113 additions and 53 deletions
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core/text/regex/virtual_machine/util.odin
+2
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@@ -34,6 +34,7 @@ iterate_opcodes :: proc(iter: ^Opcode_Iterator) -> (opcode: Opcode, pc: int, ok:
case .Split: iter.pc += size_of(Opcode) + 2 * size_of(u16)
case .Save: iter.pc += size_of(Opcode) + size_of(u8)
case .Assert_Start: iter.pc += size_of(Opcode)
case .Assert_Start_Multiline: iter.pc += size_of(Opcode)
case .Assert_End: iter.pc += size_of(Opcode)
case .Assert_Word_Boundary: iter.pc += size_of(Opcode)
case .Assert_Non_Word_Boundary: iter.pc += size_of(Opcode)
@@ -64,6 +65,7 @@ opcode_to_name :: proc(opcode: Opcode) -> (str: string) {
case .Split: str = "Split"
case .Save: str = "Save"
case .Assert_Start: str = "Assert_Start"
case .Assert_Start_Multiline: str = "Assert_Start_Multiline"
case .Assert_End: str = "Assert_End"
case .Assert_Word_Boundary: str = "Assert_Word_Boundary"
case .Assert_Non_Word_Boundary: str = "Assert_Non_Word_Boundary"