scanner: disable printing for WASM

.github/workflows/ci.yml

@@ -93,12 +93,34 @@ jobs:
         with:
           command: build
 
+  wasm:
+    needs: [generate]
+    runs-on: ubuntu-latest
+    name: Run WASM test build
+    steps:
+      - uses: actions/checkout@v4
+      - name: Download generated parser
+        uses: actions/download-artifact@v4
+        with:
+          name: parser
+          path: src/
+      - name: Setup NodeJS
+        uses: actions/setup-node@v4
+        with:
+          cache: "npm"
+          node-version: "20"
+      - name: Install dependencies
+        run: npm ci
+      - name: Run test build
+        run: npx tree-sitter build --wasm
+
   success:
     needs:
       - compare-parser
       - generate
       - tests
       - rust
+      - wasm
     if: always()
     runs-on: ubuntu-latest
     name: "All checks passed"

.gitignore

@@ -15,3 +15,4 @@ target/
 *.so
 *.pc
 *.a
+*.wasm

src/scanner.c

@@ -47,13 +47,21 @@ static bool debug_mode = false; /* NOLINT(*-global-variables) */
 static const bool debug_mode = false;
 #endif
 
-#define RUNTIME_ASSERT(cond)                                            \
-  if (!(cond)) {                                                        \
-    (void)fprintf(                                                      \
-        stderr, "lex_nim: %s():%d: Assertion `%s' failed.\n", __func__, \
-        __LINE__, #cond);                                               \
-    abort();                                                            \
-  }
+#ifndef __wasm__
+#  define RUNTIME_ASSERT(cond)                                            \
+    if (!(cond)) {                                                        \
+      (void)fprintf(                                                      \
+          stderr, "lex_nim: %s():%d: Assertion `%s' failed.\n", __func__, \
+          __LINE__, #cond);                                               \
+      abort();                                                            \
+    }
+#else
+// WASM doesn't have printing enabled
+#  define RUNTIME_ASSERT(cond) \
+    if (!(cond)) {             \
+      abort();                 \
+    }
+#endif
 
 #define MIN(left, right) ((left) > (right) ? (right) : (left))
 #define MAX(left, right) ((left) < (right) ? (right) : (left))