fix: External traversal for raw WGSL implemented functions

[aleksanderkatan]

Before: given an external, if resolvable then replace occurrences with resolved, otherwise look which keys appear in the code with a prop following them, and call recursively with external.prop.

Now: given externals, look for prop chains starting with external keys, then follow them until either a resolvable appears, or the chain ends.

Other changes:

• I removed the warn when an unused external is found. I think that it may occur that a given set of externals is applied to all functions to avoid having to list them separately or to allow for user provided raw WGSL implementations, and it was unsilencable. Tell me if you think it's worth adding it back (it will be tricky, we will have to traverse externals for that).
• Resolved wgsl is now ordered differently. Before, externals were added in order they were provided, now there is only one regex match call, and the order matches the order of appearance.

[github-actions]

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[github-actions]

Bundle size comparison (import * as ... in PR vs import * as ... in target):

🟢 Decreased	➖ Unchanged	🔴 Increased	❔ Unknown
23	297	0	0

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Click to reveal the results table (297 entries).

Test	tsdown
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std_floor.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_ldexp.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_round.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_trunc.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_acos.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_asin.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_atan.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_ceil.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_cosh.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_exp2.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_log2.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_sign.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_sinh.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_sqrt.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_step.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_tanh.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_abs.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_cos.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_exp.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_fma.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_log.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_max.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_min.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_pow.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_sin.ts	103.13 kB ($${\color{red}+56.1\%}$$)
std_tan.ts	103.13 kB ($${\color{red}+56.1\%}$$)
common_fullScreenTriangle.ts	57.14 kB ($${\color{red}+41.5\%}$$)
common_writeSoA.ts	57.13 kB ($${\color{red}+38.5\%}$$)
STATIC_allImports.ts	287.16 kB ($${\color{green}-1.7\%}$$)
STATIC_d.ts	87.40 kB ($${\color{green}-2.6\%}$$)
STATIC_std.ts	103.13 kB ($${\color{green}-2.7\%}$$)

If you wish to run a comparison for other, slower bundlers, run the 'Tree-shake test' from the GitHub Actions menu.

[github-actions]

Resolution Time Benchmark

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  line [0.83, 1.65, 3.60, 5.77, 6.42, 8.75, 18.06, 20.54]
  line [0.80, 1.63, 3.54, 5.41, 6.35, 10.14, 17.95, 22.20]

Loading

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  line [0.32, 0.48, 0.68, 0.74, 1.00, 1.03, 1.19, 1.32]
  line [0.30, 0.51, 0.59, 0.72, 0.96, 1.00, 1.26, 1.37]

Loading

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  line [0.77, 1.80, 3.42, 5.53, 10.69, 23.73, 47.29, 96.56]

Loading

[aleksanderkatan]

@pullfrog review

[pullfrog]

Important

The new in externalMap check on packages/typegpu/src/core/resolve/externals.ts:98 walks the prototype chain, so WGSL identifiers like toString, constructor, or valueOf are incorrectly treated as missing externals and trigger spurious warnings. See the inline comment for the one-line fix.

Reviewed changes — a rewrite of replaceExternalsInWgsl that resolves external property chains in a single regex pass instead of recursing per external key.

• Single-pass external resolution — replaceExternalsInWgsl now finds all bounded identifier chains, walks them until a resolvable value is found, and caches resolved values.
• Removed unused-external warning — the call to warn when an external key isn't used has been removed.
• Test and snapshot updates — declare.test.ts, resolve.test.ts, and several console-log snapshots were updated for the new resolution ordering.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using openrouter/moonshotai/kimi-k2.7-code (free via Pullfrog for OSS) ｜ 𝕏}

[pullfrog]

ℹ️ One behavioral change worth confirming — details inline.

Reviewed changes — rewrote raw-WGSL external resolution to traverse identifier chains in a single scan and resolve at the first resolvable link.

• Rewrite replaceExternalsInWgsl — uses one regex scan over WGSL, walks each identifier chain through the external map, and resolves at the first resolvable value or warns when the chain ends without one.
• Remove the unused-external warning — the old The external 'X' wasn't used... console warning is dropped because externals may be applied broadly across functions.
• Emit resolved WGSL in source order — inline snapshots updated to reflect declarations appearing in the order they are referenced rather than in $uses insertion order.
• Update tgpu.declare tests — declarations are now explicitly referenced in templates; unreferenced declarations are no longer injected.

  ^{｜ Fix all ➔ ｜ Fix 👍s ➔ ｜ View workflow run ｜ Using Kimi K2 (free via Pullfrog for OSS) ｜ 𝕏}