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Perform comparison instead when there is no equation variable

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PaddiM8 2022-01-14 16:57:01 +01:00
parent 1273206d6a
commit 38895e0265
1 changed files with 23 additions and 3 deletions
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26
kalk/src/analysis.rs
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@ -207,12 +207,21 @@ fn analyse_binary<'a>(
// Equation // Equation
context.in_equation = true; context.in_equation = true;
let left = analyse_expr(context, left)?; let left = analyse_expr(context, left)?;
// If it has already been set to false manually somewhere else,
// abort and analyse as a comparison instead.
if context.in_equation == false {
context.in_conditional = true;
return analyse_binary(context, left, op, right);
}
context.in_equation = false; context.in_equation = false;
let var_name = if let Some(var_name) = &context.equation_variable { let var_name = if let Some(var_name) = &context.equation_variable {
var_name var_name
} else { } else {
return Err(CalcError::UnableToSolveEquation); context.in_conditional = true;
return analyse_binary(context, left, op, right);
}; };
let inverted = if inverter::contains_var(&mut context.symbol_table, &left, var_name) { let inverted = if inverter::contains_var(&mut context.symbol_table, &left, var_name) {
@ -231,6 +240,7 @@ fn analyse_binary<'a>(
Identifier::from_full_name(var_name), Identifier::from_full_name(var_name),
Box::new(inverted.clone()), Box::new(inverted.clone()),
)); ));
context.equation_variable = None;
return Ok(inverted); return Ok(inverted);
} }
@ -378,6 +388,11 @@ fn build_fn_call(
context.in_integral = true; context.in_integral = true;
} }
// Don't perform equation solving on special functions
if is_integral || identifier.full_name == "sum" || identifier.full_name == "prod" {
context.in_equation = false;
}
let arguments = match adjacent_expr { let arguments = match adjacent_expr {
Expr::Vector(arguments) => { Expr::Vector(arguments) => {
let mut new_arguments = Vec::new(); let mut new_arguments = Vec::new();
@ -484,7 +499,7 @@ fn build_split_up_vars(
Ok(left) Ok(left)
} }
fn build_var(context: &Context, name: &str) -> Expr { fn build_var(context: &mut Context, name: &str) -> Expr {
if let (Some(function_name), Some(params)) = ( if let (Some(function_name), Some(params)) = (
context.current_function_name.as_ref(), context.current_function_name.as_ref(),
context.current_function_parameters.as_ref(), context.current_function_parameters.as_ref(),
@ -494,5 +509,10 @@ fn build_var(context: &Context, name: &str) -> Expr {
return Expr::Var(identifier); return Expr::Var(identifier);
} }
} }
return Expr::Var(Identifier::from_full_name(name));
if context.in_equation && !context.symbol_table.contains_var(name) {
context.equation_variable = Some(name.to_string());
}
Expr::Var(Identifier::from_full_name(name))
} }