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https://github.com/edg-l/edlang.git
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fix double return
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parent
7e88b8fb12
commit
9d48259a13
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@ -5,4 +5,5 @@ fn add(a: i64, b: i64) -> i64 {
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fn main() {
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let x = 2 + 3;
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let y = add(x, 4);
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return;
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}
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@ -10,7 +10,7 @@ pub struct StatementBody {
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pub enum Statement {
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Assignment(StatementBody),
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Definition(StatementBody),
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Return(SpanValue<Box<Expr>>),
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Return(Option<SpanValue<Box<Expr>>>),
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Function(Function),
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}
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@ -142,11 +142,16 @@ impl<'ctx> CodeGen<'ctx> {
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}
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// todo: check function has return?
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let mut has_return = false;
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for statement in &function.body {
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if let Statement::Return(_) = statement.value {
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has_return = true
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}
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self.compile_statement(&entry_block, statement, &mut variables)?;
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}
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if function.return_type.is_none() {
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if !has_return {
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self.builder.build_return(None);
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}
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@ -176,10 +181,14 @@ impl<'ctx> CodeGen<'ctx> {
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variables.insert(body.ident.0.value.clone(), result);
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}
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Statement::Return(ret) => {
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let result = self
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.compile_expression(block, ret, variables)?
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.expect("should have result");
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self.builder.build_return(Some(&result));
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if let Some(ret) = ret {
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let result = self
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.compile_expression(block, ret, variables)?
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.expect("should have result");
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self.builder.build_return(Some(&result));
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} else {
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self.builder.build_return(None);
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}
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}
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Statement::Function(_function) => unreachable!(),
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};
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@ -65,7 +65,7 @@ Function: Function = {
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BasicStatement: SpanValue<Statement> = {
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<l:@L> "let" <i:Identifier> "=" <e:Expr> ";" <r:@R> => SpanValue::new(l, Statement::new_assignment(i, e), r),
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<l:@L> <i:Identifier> "=" <e:Expr> ";" <r:@R> => SpanValue::new(l, Statement::new_definition(i, e), r),
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<l:@L> "return" <e:Expr> ";" <r:@R> => SpanValue::new(l, Statement::Return(e), r),
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<l:@L> "return" <e:Expr?> ";" <r:@R> => SpanValue::new(l, Statement::Return(e), r),
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};
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Statement: SpanValue<Statement> = {
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@ -40,7 +40,7 @@ enum Commands {
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input: PathBuf,
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/// Output optimized llvm ir.
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#[arg(short, long)]
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#[arg(long)]
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optimize: bool,
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/// The output file. If not specified its output will be stdout.
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@ -98,7 +98,12 @@ fn main() -> Result<()> {
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let program = ProgramData::new(&str_path, &code);
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check_program(&program, &ast);
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}
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Commands::Compile { input, output, debug: _, optimize: _ } => {
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Commands::Compile {
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input,
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output,
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debug: _,
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optimize: _,
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} => {
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let code = fs::read_to_string(&input)?;
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let parser = grammar::ProgramParser::new();
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