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"""Common AST node definitions for ppmck and pyxel MML."""
from dataclasses import dataclass, field
from typing import Any
@dataclass
class ASTNode:
"""Base class for all AST nodes."""
line: int
column: int
@dataclass
class Program(ASTNode):
"""Root program node."""
tracks: list[Track] = field(default_factory=list)
@dataclass
class Track(ASTNode):
"""A single track definition."""
track_id: str # "A" / "B" / "T" / "N" / "L" (ppmck) or "0"-"3" (pyxel)
channel: str # "Pulse1" / "Pulse2" / "Triangle" / "Noise" / "Loop"
mode: str # "ppmck" / "pyxel"
statements: list[Statement] = field(default_factory=list)
headers: list[Header] = field(default_factory=list)
@dataclass
class Header(ASTNode):
"""ppmck # header line."""
key: str
value: str
unterminated: bool = False
# --- Statements ---
@dataclass
class NoteStmt(ASTNode):
"""A note command (c, d, e, ...)."""
note_name: str # normalized to lowercase: "c"-"b"
accidental: int = 0 # +1 sharp, -1 flat, 0 none
length: int | None = None # None means use default length
dots: int = 0
@dataclass
class RestStmt(ASTNode):
"""A rest command (r / R)."""
length: int | None = None
dots: int = 0
@dataclass
class OctaveStmt(ASTNode):
"""Octave command or relative octave shift."""
value: int | None = None # absolute octave number
direction: str | None = None # "up" or "down" for relative shifts
@dataclass
class LengthStmt(ASTNode):
"""Default length command (l / L)."""
value: int
@dataclass
class VolumeStmt(ASTNode):
"""Volume command (v / V)."""
value: int
@dataclass
class DutyStmt(ASTNode):
"""Duty/tone command (q / @)."""
value: int
@dataclass
class TempoStmt(ASTNode):
"""Tempo command (t / T)."""
value: int
@dataclass
class GateTimeStmt(ASTNode):
"""Gate time command (Q, pyxel only)."""
value: int
@dataclass
class TransposeStmt(ASTNode):
"""Transpose command (K, pyxel only)."""
value: int
@dataclass
class DetuneStmt(ASTNode):
"""Detune command (Y, pyxel only)."""
value: int
@dataclass
class TieStmt(ASTNode):
"""Tie/slur command (&)."""
target: NoteStmt | RestStmt | int | None = None
@dataclass
class RepeatStartStmt(ASTNode):
"""Start of repeat section ([)."""
pass
@dataclass
class RepeatEndStmt(ASTNode):
"""End of repeat section (] with optional count)."""
count: int | None = None # None means infinite
@dataclass
class BarStmt(ASTNode):
"""Bar line (|), visual only."""
pass
@dataclass
class ExtCmdStmt(ASTNode):
"""pyxel @ENV / @VIB / @GLI command."""
cmd: str # "ENV" / "VIB" / "GLI"
slot: int
params: list[int] = field(default_factory=list)
# --- Stage 2 statements (kept in AST but ignored by semantic analyzer) ---
@dataclass
class CountLengthStmt(ASTNode):
"""ppmck count length note (c%48)."""
note_name: str
accidental: int
count: int
@dataclass
class EnvelopeDefStmt(ASTNode):
"""ppmck envelope definition (@v0 = { ... })."""
slot: int
points: list[int] = field(default_factory=list)
loop_points: list[int] = field(default_factory=list)
@dataclass
class SweepStmt(ASTNode):
"""ppmck sweep command (s1,2)."""
speed: int
depth: int
@dataclass
class NoiseModeStmt(ASTNode):
"""ppmck noise mode command (m0 / m1)."""
mode: int
Statement = (
NoteStmt
| RestStmt
| OctaveStmt
| LengthStmt
| VolumeStmt
| DutyStmt
| TempoStmt
| GateTimeStmt
| TransposeStmt
| DetuneStmt
| TieStmt
| RepeatStartStmt
| RepeatEndStmt
| BarStmt
| ExtCmdStmt
| CountLengthStmt
| EnvelopeDefStmt
| SweepStmt
| NoiseModeStmt
)
def _node_to_dict(node: Any) -> Any:
"""Recursively convert an AST node to a JSON-compatible dict."""
if isinstance(node, list):
return [_node_to_dict(item) for item in node]
if not isinstance(node, ASTNode):
return node
data: dict[str, Any] = {"__type__": node.__class__.__name__}
for key, value in node.__dict__.items():
data[key] = _node_to_dict(value)
return data
def ast_to_dict(node: ASTNode) -> dict[str, Any]:
"""Convert an AST node to a JSON-compatible dict."""
return _node_to_dict(node)
|
