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use std::str::FromStr;
use std::collections::HashMap;
use ast::{ModelicaModel, ComponentDeclaration,
ComponentClause, ComponentPrefix, Connection, SimpleEquation, Expr,
BinOperator, MathUnaryFunc, collapse_components};
// This is an incomplete, non-standards-compliant, minimum-viable parser
// Based on the Modelica 3.3r1 Spec
grammar;
// === Lexical Tokens ===
// Roughly (but possibly not exactly) follows B.1
pub identifier: String = {
r"[a-zA-Z_][a-zA-Z_0-9]*" => <>.to_string(),
r"[a-zA-Z_][a-zA-Z_0-9]*\.[a-zA-Z_0-9]+" => <>.to_string(),
r"[a-zA-Z_][a-zA-Z_0-9]*\.[a-zA-Z_0-9]+\.[a-zA-Z_0-9]" => <>.to_string(),
};
string_literal: String = {
// Strip quotes from string literals
<s:r#""[^"\\]*""#> => s[1..s.len()-1].to_string(),
};
pub integer: i64 = {
r"[+-]?\d+" => i64::from_str(<>).unwrap(),
};
pub float: f64 = {
r"[+-]?\d+\.\d*([eE][-+]?\d+)?" => f64::from_str(<>).unwrap(),
};
pub boolean: bool = {
"true" => true,
"false" => false,
};
// Grammar
pub model: ModelicaModel = {
"partial"? "model" <n:identifier> <desc:string_literal?>
extends_clause*
<cpc:component_clause*>
"equation"
<cc:connect_clause*>
<se:simple_equation*>
"end" identifier ";" =>
ModelicaModel {
name:n,
description:desc,
components: { collapse_components(&cpc) },
connections:cc,
equations:se,
},
};
extends_clause: String = {
"extends" <identifier> ";" => <>,
};
within_clause: String = {
"within" <identifier> ";" => <>,
};
component_clause: ComponentClause = {
<prefix:component_prefix?>
<specifier:identifier>
<declarations:component_declaration+> ";" =>
ComponentClause {
prefix:prefix,
specifier:specifier,
declarations:declarations },
};
component_declaration: ComponentDeclaration = {
<name:identifier>
<ad:array_dimensions?>
<mods:class_mod?>
<value:assignment_mod?>
<desc:string_literal?>
(",")? =>
ComponentDeclaration {
name:name,
dimensions:ad,
description:desc,
value:value,
mods: { mods.unwrap_or(HashMap::new()) },
quantity:None },
};
// component_assigns happen in:
// component declarations
// argument lists
// class_modifications (parens) happen in the above plus:
// annotations
// extends
// RHS of single-line class defs
assignment_mod: Expr = {
"=" <expr> => <>,
};
class_mod: HashMap<String, Expr> = {
"(" <calist:(<component_assign> ","?)+> ")" => {
let mut out: HashMap<String, Expr> = HashMap::new();
for ca in calist {
out.insert(ca.0, ca.1);
}
out
}
};
component_assign: (String, Expr) = {
<i:identifier> "=" <e:expr> => (i, e),
};
annotation: () = {
"annotation" class_mod? => (),
};
// TODO: this is very partial/cludgy
array_dimensions: Vec<i64> = {
"[" <dimensions:(<integer> ","?)+> "]" => dimensions,
"[" ":" "]" => vec![],
};
component_prefix: ComponentPrefix = {
"flow" => ComponentPrefix::Flow,
"stream" => ComponentPrefix::Stream,
"input" => ComponentPrefix::Input,
"output" => ComponentPrefix::Output,
"discrete" => ComponentPrefix::Discrete,
"parameter" => ComponentPrefix::Parameter,
"constant" => ComponentPrefix::Constant,
};
simple_equation: SimpleEquation = {
<lhs:expr> "=" <rhs:expr> ";" => SimpleEquation {lhs:lhs, rhs:rhs},
};
connect_clause: Connection = {
"connect" "(" <a:identifier> "," <b:identifier> ")" ";" =>
Connection { a: a.to_string(), b: b.to_string()},
};
// This weird expr/factor/term hierarchy is for binary operator precedence
expr: Expr = {
<lhs:expr> "+" <rhs:factor> =>
Expr::BinExpr(BinOperator::Add, Box::new(lhs), Box::new(rhs)),
<lhs:expr> "-" <rhs:factor> =>
Expr::BinExpr(BinOperator::Subtract, Box::new(lhs), Box::new(rhs)),
factor,
};
factor: Expr = {
<lhs:factor> "*" <rhs:term> =>
Expr::BinExpr(BinOperator::Multiply, Box::new(lhs), Box::new(rhs)),
<lhs:factor> "/" <rhs:term> =>
Expr::BinExpr(BinOperator::Divide, Box::new(lhs), Box::new(rhs)),
<lhs:factor> "^" <rhs:term> =>
Expr::BinExpr(BinOperator::Exponentiate, Box::new(lhs), Box::new(rhs)),
// TODO: this could be a "negate" unary op?
"-" <t:term> =>
Expr::BinExpr(BinOperator::Multiply, Box::new(Expr::Integer(-1)), Box::new(t)),
term,
};
// TODO: elementwise operators (".+", "./", ".*", ".-")
term: Expr = {
integer => Expr::Integer(<>),
boolean => Expr::Boolean(<>),
float => Expr::Float(<>),
identifier => Expr::Ident(<>),
string_literal => Expr::StringLiteral(<>),
"der" "(" <e:expr> ")" => Expr::Der(Box::new(e)),
"abs" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Abs, Box::new(e)),
"sqrt" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Sqrt, Box::new(e)),
"sin" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Sin, Box::new(e)),
"cos" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Cos, Box::new(e)),
"tan" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Tan, Box::new(e)),
"asin" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Asin, Box::new(e)),
"acos" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Acos, Box::new(e)),
"atan" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Atan, Box::new(e)),
"sinh" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Sinh, Box::new(e)),
"cosh" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Cosh, Box::new(e)),
"tanh" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Tanh, Box::new(e)),
"exp" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Exp, Box::new(e)),
"log" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Log, Box::new(e)),
"log10" "(" <e:expr> ")" => Expr::MathUnaryExpr(MathUnaryFunc::Log10, Box::new(e)),
"(" <e:expr> ")" => e,
};
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