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use crate::output::emitter::*;
impl EmitContext<'_> {
/// Emit one rule action; `rule_final` marks the last action of the rule,
/// for which an `if`/`if-else` closes without the trailing `End;`
/// (the pinned oracle's spelling, #87).
pub(crate) fn action(
&mut self,
id: wir::ActionId,
level: usize,
rule_final: bool,
) -> Result<()> {
let Some(action) = self.program.actions.get(id) else {
return Err(WorkshopError::Malformed {
message: format!("dangling action {id}"),
span: None,
});
};
match action {
wir::Action::SetGlobalVariable {
variable, value, ..
} => {
let name = self.global_name(*variable)?;
let mut value_text = String::new();
self.value(*value, &mut value_text)?;
let keyword = self.spelling(Kind::Structural, "setGlobalVariable")?;
self.line(level, &format!("{keyword}({name}, {value_text});"))?;
}
wir::Action::ModifyGlobalVariable {
variable,
op,
value,
..
} => {
let name = self.global_name(*variable)?;
let op = self.modify_op_spelling(*op)?;
let mut value_text = String::new();
self.value(*value, &mut value_text)?;
let keyword = self.spelling(Kind::Structural, "modifyGlobalVariable")?;
self.line(level, &format!("{keyword}({name}, {op}, {value_text});"))?;
}
wir::Action::SetPlayerVariable {
player,
variable,
value,
..
} => {
let mut player_text = String::new();
self.value(*player, &mut player_text)?;
let name = self.player_name(*variable)?;
let mut value_text = String::new();
self.value(*value, &mut value_text)?;
let keyword = self.spelling(Kind::Structural, "setPlayerVariable")?;
self.line(
level,
&format!("{keyword}({player_text}, {name}, {value_text});"),
)?;
}
wir::Action::ModifyPlayerVariable {
player,
variable,
op,
value,
..
} => {
let mut player_text = String::new();
self.value(*player, &mut player_text)?;
let name = self.player_name(*variable)?;
let op = self.modify_op_spelling(*op)?;
let mut value_text = String::new();
self.value(*value, &mut value_text)?;
let keyword = self.spelling(Kind::Structural, "modifyPlayerVariable")?;
self.line(
level,
&format!("{keyword}({player_text}, {name}, {op}, {value_text});"),
)?;
}
wir::Action::CallSubroutine { subroutine, .. } => {
let name = self
.program
.subroutines
.get(*subroutine)
.map(|s| s.name.clone())
.ok_or_else(|| WorkshopError::Unknown {
kind: "subroutine",
spelling: format!("<{subroutine}>"),
locale: self.locale.clone(),
span: None,
})?;
let keyword = self.spelling(Kind::Structural, "callSubroutine")?;
self.line(level, &format!("{keyword}({name});"))?;
}
wir::Action::If {
branches,
else_body,
..
} => {
for (index, branch) in branches.iter().enumerate() {
let mut condition = String::new();
self.value(branch.condition, &mut condition)?;
let keyword =
self.spelling(Kind::Structural, if index == 0 { "if" } else { "elseIf" })?;
self.line(level, &format!("{keyword}({condition});"))?;
for action in &branch.body {
self.action(*action, level + 1, false)?;
}
}
if let Some(else_body) = else_body {
let keyword = self.spelling(Kind::Structural, "else")?;
self.line(level, &format!("{keyword};"))?;
for action in else_body {
self.action(*action, level + 1, false)?;
}
}
// A rule-final if closes the rule without `End;` (oracle
// spelling); nested and middle-of-rule ifs keep it.
if !rule_final {
let keyword = self.spelling(Kind::Structural, "end")?;
self.line(level, &format!("{keyword};"))?;
}
}
wir::Action::While {
condition, body, ..
} => {
let mut text = String::new();
self.value(*condition, &mut text)?;
let keyword = self.spelling(Kind::Structural, "while")?;
self.line(level, &format!("{keyword}({text});"))?;
for action in body {
self.action(*action, level + 1, false)?;
}
let end = self.spelling(Kind::Structural, "end")?;
self.line(level, &format!("{end};"))?;
}
wir::Action::ForGlobalVariable {
variable,
start,
stop,
step,
body,
..
} => {
let name = self.global_name(*variable)?;
let mut start_text = String::new();
let mut stop_text = String::new();
let mut step_text = String::new();
self.value(*start, &mut start_text)?;
self.value(*stop, &mut stop_text)?;
self.value(*step, &mut step_text)?;
let keyword = self.spelling(Kind::Structural, "forGlobalVariable")?;
self.line(
level,
&format!("{keyword}({name}, {start_text}, {stop_text}, {step_text});"),
)?;
for action in body {
self.action(*action, level + 1, false)?;
}
let end = self.spelling(Kind::Structural, "end")?;
self.line(level, &format!("{end};"))?;
}
wir::Action::ForPlayerVariable {
player,
variable,
start,
stop,
step,
body,
..
} => {
let keyword = self.structural("forPlayerVariable")?;
let mut player_text = String::new();
let mut start_text = String::new();
let mut stop_text = String::new();
let mut step_text = String::new();
self.value(*player, &mut player_text)?;
self.value(*start, &mut start_text)?;
self.value(*stop, &mut stop_text)?;
self.value(*step, &mut step_text)?;
let name = self.player_name(*variable)?;
self.line(
level,
&format!(
"{}({player_text}, {name}, {start_text}, {stop_text}, {step_text});",
keyword
),
)?;
for action in body {
self.action(*action, level + 1, false)?;
}
let end = self.spelling(Kind::Structural, "end")?;
self.line(level, &format!("{end};"))?;
}
wir::Action::AssignMember {
target, op, value, ..
} => {
let mut target_text = String::new();
let mut value_text = String::new();
self.value(*target, &mut target_text)?;
self.value(*value, &mut value_text)?;
let operator = match op {
None => "=".to_string(),
Some(op) => {
let token = match op {
wir::ModifyOp::Add => "+",
wir::ModifyOp::Subtract => "-",
wir::ModifyOp::Multiply => "*",
wir::ModifyOp::Divide => "/",
wir::ModifyOp::Modulo => "%",
wir::ModifyOp::Min => "min",
wir::ModifyOp::Max => "max",
_ => {
return Err(WorkshopError::Unsupported {
message: format!(
"unsupported member assignment operator {op:?}"
),
span: None,
});
}
};
format!("{token}=")
}
};
self.line(level, &format!("{target_text} {operator} {value_text};"))?;
}
wir::Action::Call { name, args, .. } => {
// The chase family dispatches on the first argument's
// variable kind, mirroring the pinned reference: a global
// variable emits the global form with the argument list
// unchanged; a player variable emits the player form with
// the receiver split into `player, name` leading arguments
// (the frontend guarantees a variable first argument,
// issue #110).
if matches!(name.as_str(), "chaseAtRate" | "chaseOverTime") {
let player_var = args.first().and_then(|id| {
self.program
.values
.get(*id)
.and_then(|node| match &node.value {
wir::Value::PlayerVariable { player, variable } => {
Some((*player, *variable))
}
_ => None,
})
});
let spelling = if let Some((player, variable)) = player_var {
let id = if name == "chaseAtRate" {
"chasePlayerVariableAtRate"
} else {
"chasePlayerVariableOverTime"
};
let spelling = self.spelling(Kind::Action, id)?;
// `Chase Player Variable At Rate(player, name, …)`:
// the receiver splits into `player, name` leading
// arguments (the pinned oracle's spelling).
let mut text = String::new();
self.value(player, &mut text)?;
let mut parts = vec![text, self.player_name(variable)?];
for arg in args.iter().skip(1) {
let mut part = String::new();
self.value(*arg, &mut part)?;
parts.push(part);
}
return self.line(level, &format!("{spelling}({});", parts.join(", ")));
} else {
self.spelling(Kind::Action, name)?
};
let mut args_text = String::new();
self.args(args, &mut args_text)?;
return self.line(level, &format!("{spelling}({args_text});"));
}
if name == "stopChasingPlayerVariable" {
let Some((player, variable)) = args.first().and_then(|id| {
self.program
.values
.get(*id)
.and_then(|node| match &node.value {
wir::Value::PlayerVariable { player, variable } => {
Some((*player, *variable))
}
_ => None,
})
}) else {
return Err(WorkshopError::Malformed {
message: "Stop Chasing Player Variable requires a player variable"
.into(),
span: None,
});
};
let spelling = self.spelling(Kind::Action, name)?;
let mut player_text = String::new();
self.value(player, &mut player_text)?;
return self.line(
level,
&format!(
"{spelling}({player_text}, {});",
self.player_name(variable)?
),
);
}
// Native `.opy` action names map to canonical catalog ids at
// emission (presentation concern).
let canonical = match name.as_str() {
"createBeam" => Some("createBeamEffect"),
_ => None,
};
let spelling = if let Some(canonical) = canonical {
self.spelling(Kind::Action, canonical)?
} else {
self.spelling(Kind::Action, name)?
};
if args.is_empty() {
self.line(level, &format!("{spelling};"))?;
} else {
let mut args_text = String::new();
for (index, arg) in args.iter().enumerate() {
if index > 0 {
args_text.push_str(", ");
}
let variable_position = match name.as_str() {
"setGlobalVariableAtIndex" | "modifyGlobalVariableAtIndex" => {
index == 0
}
"setPlayerVariableAtIndex" | "modifyPlayerVariableAtIndex" => {
index == 1
}
_ => false,
};
if variable_position {
if let Some(node) = self.program.values.get(*arg) {
match &node.value {
wir::Value::GlobalVariable(variable) => {
args_text.push_str(&self.global_name(*variable)?);
continue;
}
wir::Value::PlayerVariable { variable, .. } => {
args_text.push_str(&self.player_name(*variable)?);
continue;
}
_ => {}
}
}
}
self.value(*arg, &mut args_text)?;
}
self.line(level, &format!("{spelling}({args_text});"))?;
}
}
}
Ok(())
}
pub(crate) fn args(&mut self, args: &[wir::ValueId], out: &mut String) -> Result<()> {
for (index, arg) in args.iter().enumerate() {
if index > 0 {
out.push_str(", ");
}
self.value(*arg, out)?;
}
Ok(())
}
}