pub fn write_forward_decls(&mut self) -> String {

        let replacement_func = format!("{};", self.function_header());

        // Tracks generated splitters so we don't generate them twice.
        let mut generated = HashSet::new();

        // Extern define the splitter structs and functions.
        //
        // Non-named types are skipped.
        let splitters = self.annotation.params.iter()
                                            .filter(|param| param.ty.is_named())
                                            .enumerate()
                                            .map(|(i, param)| {

            if generated.contains(&param.ty) {
                // Filtered out later.
                return "".to_string()
            }

            generated.insert(param.ty.clone());

            // Generate the init function.
            //
            // The init function comes with a special wrapper struct that holds the arguments
            // required to initialize the splitter.
            let mut init_arg_struct_fields: Vec<_> = param.arguments.iter().map(|index| {
                self.annotation.function.arguments[*index].0.clone()
            })
            .enumerate()
            .map(|(i, v)| format!("{} _{};", v, i))
            .collect();

            // Prevents annoying warnings.
            if init_arg_struct_fields.len() == 0 {
                init_arg_struct_fields.push("char _0;".to_string());
            }

            let ref out_ty = self.annotation.function.arguments[i].0;

            let init_arg_struct = format!("{name} {{\n{fields}\n}};",
                                          name=param.ty.splitter_init_arg_struct(),
                                          fields=join("", "\n", init_arg_struct_fields.into_iter()));

            let init_func = format!("void* {func_name}({out_ty} * item_to_split, {arg_struct} * args, int64_t *num_items);",
                func_name=param.ty.splitter_init_func(),
                arg_struct=param.ty.splitter_init_arg_struct(),
                out_ty=out_ty,
            );

            // Generate the next function.
            let next_func = format!("SplitterStatus {func_name}(const void *splitter, int64_t start, int64_t end, {out_ty} *out);",
                func_name=param.ty.splitter_next_func(),
                out_ty=out_ty
            );

            let ifdef_guard = format!("\n#ifndef _{name}_DEFN_\n#define _{name}_DEFN_",
                        name=param.ty.name().unwrap().to_uppercase());

            let decl = vec![
                format!("\n// Definitions for {}.", param.ty.name().unwrap()),
                ifdef_guard,
                init_arg_struct,
                init_func,
                next_func,
                "#endif\n".to_string()
            ].into_iter();
            join("", "\n", decl)
        }).filter(|s| s.len() != 0);

        let decls = vec![
            "// Replacement function exported by this header.".to_string(),
            replacement_func,
            "\n// Function that this header replaces.".to_string(),
            // annotated_func,
            join("", "\n", splitters)
        ].into_iter();

        join("", "\n", decls)
    }
/// Writes the forward declarations required by the generated header.
///
/// This includes the replacement function that users of this header file should call,
/// and declarations of the splitters (whose implementations should be in a different file).
Writes the forward declarations required by the generated header.
This includes the replacement function that users of this header file should call,
and declarations of the splitters (whose implementations should be in a different file).
Writes the forward declarations required by the generated header . This includes the replacement function that users of this header file should call and declarations of the splitters ( whose implementations should be in a different file ) .
pub fn write_forward_decls(&mut self) -> String {
        let replacement_func = format!("{};", self.function_header());
        // Tracks generated splitters so we don't generate them twice.
        let mut generated = HashSet::new();
        // Extern define the splitter structs and functions.
        //
        // Non-named types are skipped.
        let splitters = self.annotation.params.iter()
                                            .filter(|param| param.ty.is_named())
                                            .enumerate()
                                            .map(|(i, param)| {
            if generated.contains(&param.ty) {
                // Filtered out later.
                return "".to_string()
            }
            generated.insert(param.ty.clone());
            // Generate the init function.
            //
            // The init function comes with a special wrapper struct that holds the arguments
            // required to initialize the splitter.
            let mut init_arg_struct_fields: Vec<_> = param.arguments.iter().map(|index| {
                self.annotation.function.arguments[*index].0.clone()
            })
            .enumerate()
            .map(|(i, v)| format!("{} _{};", v, i))
            .collect();
            // Prevents annoying warnings.
            if init_arg_struct_fields.len() == 0 {
                init_arg_struct_fields.push("char _0;".to_string());
            }
            let ref out_ty = self.annotation.function.arguments[i].0;
            let init_arg_struct = format!("{name} {{\n{fields}\n}};",
                                          name=param.ty.splitter_init_arg_struct(),
                                          fields=join("", "\n", init_arg_struct_fields.into_iter()));
            let init_func = format!("void* {func_name}({out_ty} * item_to_split, {arg_struct} * args, int64_t *num_items);",
                func_name=param.ty.splitter_init_func(),
                arg_struct=param.ty.splitter_init_arg_struct(),
                out_ty=out_ty,
            );
            // Generate the next function.
            let next_func = format!("SplitterStatus {func_name}(const void *splitter, int64_t start, int64_t end, {out_ty} *out);",
                func_name=param.ty.splitter_next_func(),
                out_ty=out_ty
            );
            let ifdef_guard = format!("\n#ifndef _{name}_DEFN_\n#define _{name}_DEFN_",
                        name=param.ty.name().unwrap().to_uppercase());
            let decl = vec![
                format!("\n// Definitions for {}.", param.ty.name().unwrap()),
                ifdef_guard,
                init_arg_struct,
                init_func,
                next_func,
                "#endif\n".to_string()
            ].into_iter();
            join("", "\n", decl)
        }).filter(|s| s.len() != 0);
        let decls = vec![
            "// Replacement function exported by this header.".to_string(),
            replacement_func,
            "\n// Function that this header replaces.".to_string(),
            // annotated_func,
            join("", "\n", splitters)
        ].into_iter();
        join("", "\n", decls)
    }
pub fn write_forward_decls ( & mut self ) -> String { let replacement_func = format ! ( " " self function_header ( ) ) ; // Tracks generated splitters so we don't generate them twice. let mut generated = HashSet :: new ( ) ; // Extern define the splitter structs and functions. // // Non-named types are skipped. let splitters = self . annotation . params . iter ( ) . filter ( | param | param . ty . is_named ( ) ) . enumerate ( ) . map ( | ( i , param ) | { if generated . contains ( & param . ty ) { // Filtered out later. return " " . to_string ( ) } generated . insert ( param . ty . clone ( ) ) ; // Generate the init function. // // The init function comes with a special wrapper struct that holds the arguments // required to initialize the splitter. let mut init_arg_struct_fields : Vec < _ > = param . arguments . iter ( ) . map ( | index | { self . annotation . function . arguments [ * index ] . 0 . clone ( ) } ) . enumerate ( ) . map ( | ( i , v ) | format ! ( " " v i ) ) . collect ( ) ; // Prevents annoying warnings. if init_arg_struct_fields . len ( ) == 0 { init_arg_struct_fields . push ( " " . to_string ( ) ) ; } let ref out_ty = self . annotation . function . arguments [ i ] . 0 ; let init_arg_struct = format ! ( " \n \n " name param ty splitter_init_arg_struct ( ) fields join ( " " " \n " init_arg_struct_fields into_iter ( ) ) ) ; let init_func = format ! ( " " func_name param ty splitter_init_func ( ) arg_struct param ty splitter_init_arg_struct ( ) out_ty out_ty ) ; // Generate the next function. let next_func = format ! ( " " func_name param ty splitter_next_func ( ) out_ty out_ty ) ; let ifdef_guard = format ! ( " \n \n " name param ty name ( ) unwrap ( ) to_uppercase ( ) ) ; let decl = vec ! [ format ( " \n " param ty name ( ) unwrap ( ) ) ifdef_guard init_arg_struct init_func next_func " \n " to_string ( ) ] . into_iter ( ) ; join ( " " , " \n " , decl ) } ) . filter ( | s | s . len ( ) != 0 ) ; let decls = vec ! [ " " to_string ( ) replacement_func " \n " to_string ( ) // annotated_func, join ( " " " \n " splitters ) ] . into_iter ( ) ; join ( " " , " \n " , decls ) }
Writes the forward declarations required by the generated header.
Writes the forward declarations required by the generated header .
&mut self