Begin chaning gramma structure
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23843b5117
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2d8527134d
@ -5,7 +5,7 @@
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use std::fmt::{self, Debug, Formatter};
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use serde::{Deserialize, Serialize};
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use tree_sitter::{Node, Parser, Tree as TSTree, TreeCursor};
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use tree_sitter::{Node, Parser, Tree as TSTree};
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use crate::{language, Error, Result, Value, VariableMap};
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@ -17,8 +17,8 @@ use crate::{language, Error, Result, Value, VariableMap};
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/// # Examples
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///
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/// ```rust
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/// # use dust_lib::*;
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/// assert_eq!(eval("1 + 2 + 3"), vec![Ok(Value::from(6))]);
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/// # use dust::*;
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/// assert_eq!(evaluate("1 + 2 + 3"), vec![Ok(Value::Integer(6))]);
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/// ```
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pub fn evaluate(source: &str) -> Vec<Result<Value>> {
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let mut context = VariableMap::new();
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@ -31,7 +31,7 @@ pub fn evaluate(source: &str) -> Vec<Result<Value>> {
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/// # Examples
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///
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/// ```rust
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/// # use dust_lib::*;
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/// # use dust::*;
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/// let mut context = VariableMap::new();
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///
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/// context.set_value("one".into(), 1.into());
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@ -41,8 +41,8 @@ pub fn evaluate(source: &str) -> Vec<Result<Value>> {
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/// let dust_code = "four = 4 one + two + three + four";
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///
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/// assert_eq!(
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/// eval_with_context(dust_code, &mut context),
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/// vec![Ok(Value::Primitive(Primitive::Empty)), Ok(Value::from(10))]
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/// evaluate_with_context(dust_code, &mut context),
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/// vec![Ok(Value::Empty), Ok(Value::Integer(10))]
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/// );
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/// ```
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pub fn evaluate_with_context(source: &str, context: &mut VariableMap) -> Vec<Result<Value>> {
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@ -172,6 +172,8 @@ impl EvaluatorTree for Item {
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#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
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pub enum Statement {
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Expression(Expression),
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ControlFlow(Box<ControlFlow>),
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Assignment(Box<Assignment>),
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}
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impl EvaluatorTree for Statement {
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@ -184,6 +186,12 @@ impl EvaluatorTree for Statement {
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"expression" => Ok(Self::Expression(Expression::from_syntax_node(
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child, source,
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)?)),
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"control_flow" => Ok(Statement::ControlFlow(Box::new(
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ControlFlow::from_syntax_node(child, source)?,
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))),
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"assignment" => Ok(Statement::Assignment(Box::new(
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Assignment::from_syntax_node(child, source)?,
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))),
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_ => Err(Error::UnexpectedSyntax {
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expected: "expression",
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actual: child.kind(),
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@ -195,6 +203,8 @@ impl EvaluatorTree for Statement {
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fn run(&self, context: &mut VariableMap) -> Result<Value> {
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match self {
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Statement::Expression(expression) => expression.run(context),
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Statement::ControlFlow(control_flow) => control_flow.run(context),
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Statement::Assignment(assignment) => assignment.run(context),
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}
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}
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}
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@ -203,8 +213,6 @@ impl EvaluatorTree for Statement {
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pub enum Expression {
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Identifier(Identifier),
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Value(Value),
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ControlFlow(Box<ControlFlow>),
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Assignment(Box<Assignment>),
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Math(Box<Math>),
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FunctionCall(FunctionCall),
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}
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@ -218,12 +226,6 @@ impl EvaluatorTree for Expression {
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let expression = match child.kind() {
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"identifier" => Self::Identifier(Identifier::from_syntax_node(child, source)?),
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"value" => Expression::Value(Value::from_syntax_node(child, source)?),
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"control_flow" => {
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Expression::ControlFlow(Box::new(ControlFlow::from_syntax_node(child, source)?))
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}
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"assignment" => {
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Expression::Assignment(Box::new(Assignment::from_syntax_node(child, source)?))
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}
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"math" => Expression::Math(Box::new(Math::from_syntax_node(child, source)?)),
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"function_call" => {
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Expression::FunctionCall(FunctionCall::from_syntax_node(child, source)?)
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@ -243,8 +245,6 @@ impl EvaluatorTree for Expression {
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match self {
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Expression::Value(value) => Ok(value.clone()),
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Expression::Identifier(identifier) => identifier.run(context),
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Expression::ControlFlow(control_flow) => control_flow.run(context),
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Expression::Assignment(assignment) => assignment.run(context),
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Expression::Math(math) => math.run(context),
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Expression::FunctionCall(function_call) => function_call.run(context),
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}
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@ -295,13 +295,13 @@ impl EvaluatorTree for ControlFlow {
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fn from_syntax_node(node: Node, source: &str) -> Result<Self> {
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assert_eq!(node.kind(), "control_flow");
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let if_node = node.child_by_field_name("if_expression").unwrap();
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let if_node = node.child(1).unwrap();
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let if_expression = Expression::from_syntax_node(if_node, source)?;
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let then_node = node.child_by_field_name("then_statement").unwrap();
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let then_node = node.child(3).unwrap();
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let then_statement = Statement::from_syntax_node(then_node, source)?;
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let else_node = node.child_by_field_name("else_statement");
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let else_node = node.child(5);
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let else_statement = if let Some(node) = else_node {
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Some(Statement::from_syntax_node(node, source)?)
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} else {
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@ -331,7 +331,7 @@ impl EvaluatorTree for ControlFlow {
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#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq, PartialOrd, Ord)]
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pub struct Assignment {
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identifier: Identifier,
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statement: Statement,
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expression: Expression,
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}
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impl EvaluatorTree for Assignment {
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@ -341,18 +341,18 @@ impl EvaluatorTree for Assignment {
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let identifier_node = node.child(0).unwrap();
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let identifier = Identifier::from_syntax_node(identifier_node, source)?;
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let statement_node = node.child(2).unwrap();
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let statement = Statement::from_syntax_node(statement_node, source)?;
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let expression_node = node.child(2).unwrap();
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let expression = Expression::from_syntax_node(expression_node, source)?;
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Ok(Assignment {
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identifier,
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statement,
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expression,
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})
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}
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fn run(&self, context: &mut VariableMap) -> Result<Value> {
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let key = self.identifier.clone().take_inner();
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let value = self.statement.run(context)?;
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let value = self.expression.run(context)?;
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context.set_value(key, value)?;
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@ -374,7 +374,7 @@ impl EvaluatorTree for Math {
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let left_node = node.child(0).unwrap();
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let left = Expression::from_syntax_node(left_node, source)?;
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let operator_node = left_node.next_sibling().unwrap();
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let operator_node = node.child(1).unwrap().child(0).unwrap();
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let operator = match operator_node.kind() {
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"+" => MathOperator::Add,
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"-" => MathOperator::Subtract,
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@ -390,7 +390,7 @@ impl EvaluatorTree for Math {
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}
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};
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let right_node = operator_node.next_sibling().unwrap();
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let right_node = node.child(2).unwrap();
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let right = Expression::from_syntax_node(right_node, source)?;
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Ok(Math {
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@ -469,7 +469,7 @@ mod tests {
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#[test]
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fn evaluate_empty() {
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assert_eq!(evaluate("x = 9"), vec![Ok(Value::Empty)]);
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assert_eq!(evaluate("x = 'foo' + 'bar'"), vec![Ok(Value::Empty)]);
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assert_eq!(evaluate("x = 1 + 1"), vec![Ok(Value::Empty)]);
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}
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#[test]
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@ -1 +1 @@
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Subproject commit d0806c2694f27b5017b1659a45d1970ae844ecd9
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Subproject commit 4ddc65645541293ca2690c874b0ac8eb62f7e5e4
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