tests are now autogenerated from the readme, this makes test names DRY

I want to reduce friction of adding new tests as much as possible

Signed-off-by: Jakub Doka <jakub.doka2@gmail.com>

.gitignore

@@ -12,3 +12,4 @@ db.sqlite-journal
 /depell/src/static-pages/*.html
 #**/*-sv.rs
 /bytecode/src/instrs.rs
+/lang/src/testcases.rs

lang/README.md

@@ -736,28 +736,6 @@ main := fn(): uint {
 
 ### Incomplete Examples
 
-#### string_array
-```hb
-
-main := fn(): uint {
-	strings := (^u8).["abcdefshijklmnop\0".ptr, "abcdefghijklnnop\0".ptr, "abcdefshijklmnop\0".ptr, "abcdefghijklmnop\0".ptr, "abcdefghijflmnop\0".ptr, "dbcdefghijklmnop\0".ptr, "abcdefghijklmnop\0".ptr]
-	return *strings[0]
-}
-```
-
-#### comptime_pointers
-```hb
-main := fn(): uint {
-	$integer := 7
-	modify(&integer)
-	return integer
-}
-
-modify := fn($num: ^uint): void {
-	$: *num = 0
-}
-```
-
 #### fb_driver
 ```hb
 arm_fb_ptr := fn(): uint return 100
@@ -798,6 +776,30 @@ main := fn(): uint {
 
 ### Purely Testing Examples
 
+#### string_array
+```hb
+
+main := fn(): uint {
+	strings := (^u8).["abcdefshijklmnop\0".ptr, "abcdefghijklnnop\0".ptr, "abcdefshijklmnop\0".ptr, "abcdefghijklmnop\0".ptr, "abcdefghijflmnop\0".ptr, "dbcdefghijklmnop\0".ptr, "abcdefghijklmnop\0".ptr]
+	return *strings[0]
+}
+```
+
+#### generic_function_in_struct
+```hb
+A := struct {
+	a: uint,
+	b := fn(self: ^Self, $T: type, c: T): T {
+		return c
+	}
+}
+
+main := fn(): uint {
+	a := A.(100)
+	return a.b(uint, 100)
+}
+```
+
 #### len_never_goes_down
 ```hb
 chars := fn(iter: []u8): struct {

lang/build.rs

@@ -0,0 +1,35 @@
+use std::{fmt::Write, iter};
+
+fn main() {
+    const TEST_FILE: &str = "src/testcases.rs";
+    const INPUT: &str = include_str!("./README.md");
+
+    let mut out = String::new();
+    for (name, code) in block_iter(INPUT) {
+        let name = name.replace(' ', "_");
+        _ = writeln!(
+            out,
+            "#[test] fn {name}() {{ run_codegen_test(\"{name}\", r##\"{code}\"##) }}"
+        );
+    }
+
+    std::fs::write(TEST_FILE, out).unwrap();
+}
+
+fn block_iter(mut input: &str) -> impl Iterator<Item = (&str, &str)> {
+    const CASE_PREFIX: &str = "#### ";
+    const CASE_SUFFIX: &str = "\n```hb";
+
+    iter::from_fn(move || loop {
+        let pos = input.find(CASE_PREFIX)?;
+        input = unsafe { input.get_unchecked(pos + CASE_PREFIX.len()..) };
+        let Some((test_name, rest)) = input.split_once(CASE_SUFFIX) else { continue };
+        if !test_name.chars().all(|c| c.is_alphanumeric() || c == '_') {
+            continue;
+        }
+        input = rest;
+        let (body, rest) = input.split_once("```").unwrap_or((input, ""));
+        input = rest;
+        break Some((test_name, body));
+    })
+}

lang/src/lib.rs

@@ -401,10 +401,10 @@ impl Default for FnvHasher {
 
 #[cfg(test)]
 pub fn run_test(
-    name: &'static str,
+    name: &str,
-    ident: &'static str,
+    ident: &str,
-    input: &'static str,
+    input: &str,
-    test: fn(&'static str, &'static str, &mut alloc::string::String),
+    test: fn(&str, &str, &mut alloc::string::String),
 ) {
     use std::{
         io::Write,
@@ -483,31 +483,6 @@ fn test_parse_files(
         std::{borrow::ToOwned, string::ToString},
     };
 
-    fn find_block<'a>(mut input: &'a str, test_name: &str) -> &'a str {
-        const CASE_PREFIX: &str = "#### ";
-        const CASE_SUFFIX: &str = "\n```hb";
-        loop {
-            let Some(pos) = input.find(CASE_PREFIX) else {
-                unreachable!("test {test_name} not found");
-            };
-
-            input = unsafe { input.get_unchecked(pos + CASE_PREFIX.len()..) };
-            if !input.starts_with(test_name) {
-                continue;
-            }
-            input = unsafe { input.get_unchecked(test_name.len()..) };
-            if !input.starts_with(CASE_SUFFIX) {
-                continue;
-            }
-            input = unsafe { input.get_unchecked(CASE_SUFFIX.len()..) };
-
-            let end = input.find("```").unwrap_or(input.len());
-            break unsafe { input.get_unchecked(..end) };
-        }
-    }
-
-    let input = find_block(input, ident);
-
     let mut module_map = Vec::new();
     let mut embed_map = Vec::new();
     let mut last_start = 0;

lang/src/son.rs

@@ -4389,7 +4389,7 @@ mod tests {
         core::fmt::Write,
     };
 
-    fn generate(ident: &'static str, input: &'static str, output: &mut String) {
+    fn generate(ident: &str, input: &str, output: &mut String) {
         _ = log::set_logger(&crate::fs::Logger);
         log::set_max_level(log::LevelFilter::Info);
         //log::set_max_level(log::LevelFilter::Trace);
@@ -4423,111 +4423,9 @@ mod tests {
         }
     }
 
-    crate::run_tests! { generate:
+    fn run_codegen_test(name: &str, input: &str) {
-        // Tour Examples
+        crate::run_test(&format!("{}::{}", module_path!(), name), name, input, generate);
-        main_fn;
-        arithmetic;
-        floating_point_arithmetic;
-        functions;
-        comments;
-        if_statements;
-        variables;
-        hex_octal_binary_literals;
-        loops;
-        pointers;
-        structs;
-        tuples;
-        struct_scopes;
-        enums;
-        unions;
-        nullable_types;
-        struct_operators;
-        global_variables;
-        constants;
-        directives;
-        c_strings;
-        struct_patterns;
-        arrays;
-        slices;
-        inline;
-        idk;
-        generic_functions;
-        die;
-        defer;
-        unrolled_loops;
-
-        // Incomplete Examples;
-        //comptime_pointers;
-        generic_types;
-        fb_driver;
-
-        // Purely Testing Examples;
-        len_never_goes_down;
-        slice_to_global_pointer;
-        subsclice_bug;
-        string_array;
-        proper_ident_propagation;
-        method_receiver_by_value;
-        comparing_floating_points;
-        pointer_comparison;
-        different_function_destinations;
-        triggering_store_in_divergent_branch;
-        wrong_dead_code_elimination;
-        memory_swap;
-        very_nested_loops;
-        generic_type_mishap;
-        storing_into_nullable_struct;
-        scheduling_block_did_dirty;
-        null_check_returning_small_global;
-        null_check_in_the_loop;
-        stack_provenance;
-        advanced_floating_point_arithmetic;
-        nullable_structure;
-        needless_unwrap;
-        inlining_issues;
-        null_check_test;
-        only_break_loop;
-        reading_idk;
-        nonexistent_ident_import;
-        big_array_crash;
-        returning_global_struct;
-        small_struct_bitcast;
-        small_struct_assignment;
-        intcast_store;
-        string_flip;
-        signed_to_unsigned_upcast;
-        wide_ret;
-        comptime_min_reg_leak;
-        different_types;
-        struct_return_from_module_function;
-        sort_something_viredly;
-        struct_in_register;
-        comptime_function_from_another_file;
-        inline_test;
-        inlined_generic_functions;
-        some_generic_code;
-        integer_inference_issues;
-        writing_into_string;
-        request_page;
-        tests_ptr_to_ptr_copy;
-        global_variable_wiredness;
-        inline_return_stack;
-
-        // Just Testing Optimizations;
-        elide_stack_offsets_for_parameters_correctly;
-        const_folding_with_arg;
-        branch_assignments;
-        exhaustive_loop_testing;
-        pointer_opts;
-        conditional_stores;
-        loop_stores;
-        dead_code_in_loop;
-        infinite_loop_after_peephole;
-        aliasing_overoptimization;
-        global_aliasing_overptimization;
-        overwrite_aliasing_overoptimization;
-        more_if_opts;
-        optional_from_eca;
-        returning_optional_issues;
     }
+
+    include!("./testcases.rs");
 }