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Passing This code compiles and runs correctly.
Code
// Test: ~if compiles to literal if/else with ZERO event overhead
//
// This test verifies that the ~if transform generates INLINE Zig code
// using the Flow.inline_body field, instead of calling if_impl_event.handler.
//
// What this tests:
// - Template metaprogramming: template_utils.lookupTemplate + interpolate
// - Flow.inline_body field for zero-overhead code emission
// - continuation_codegen generates correct handler calls
// - Emitter outputs inline_body directly
~import std/io
const std = @import("std");
const value = 42;
~if(value > 10)
| then |> std/io:print.ln("Greater than 10")
| else |> std/io:print.ln("10 or less")
Flows
flow ~if click a branch to expand · @labels scroll to their anchor
if (value > 10)
Test Configuration
Post-validation Script:
#!/bin/bash
# Verify that the generated code uses literal if/else, NOT event handler call
OUTPUT_FILE="output_emitted.zig"
# Check that if_impl_event.handler is NOT present in actual code (exclude comments)
# Comments start with // so we filter those out first
if grep -v "^[[:space:]]*//" "$OUTPUT_FILE" | grep -q "if_impl_event.handler"; then
echo "FAIL: Found if_impl_event.handler call - should be literal if/else"
echo "The ~if transform should emit 'if (condition) { ... } else { ... }'"
echo "NOT 'if_impl_event.handler(.{ .condition = ... })'"
exit 1
fi
# Check that literal if statement IS present (good pattern)
# Look for: if (value > 10) or if (main_module.value > 10)
if ! grep -qE "if \([^)]*value > 10" "$OUTPUT_FILE"; then
echo "FAIL: Expected literal 'if (value > 10)' not found"
echo "The ~if transform should emit a literal Zig if statement"
exit 1
fi
echo "PASS: ~if compiles to zero-overhead literal if/else"
exit 0