topic / programming-language-internals

Programming Language Internals

Follow source text through parsing, checking, compilation, and execution.

Study lexers, parsers, syntax trees, type checking, intermediate representations, bytecode, interpreters, JIT compilers, and language-specific runtime machinery.

1 article · 1 video · 1 trace · 2 request flows · 1 interview · 6 total

Articles

programming language internalsSep 25, 2026

From Characters to Executable Behavior

Follow a small program through lexing, parsing, semantic checks, intermediate forms, code generation, and runtime execution.

8 min readRead

Request Flows

request flow · 5 stagesC++ Memory LayoutVisual map of C++ memory segments: text (code), data (globals), heap (dynamic), and stack (locals).request flow · 5 stagesSource Text Becomes an Executable RepresentationVisualize scanning, parsing, semantic checks, intermediate forms, bytecode or machine-code generation, and runtime work.

Videos

In production

programming language internalsSep 25, 2026

Build a Tiny Interpreter

A planned coding lesson turns arithmetic source text into tokens, an expression tree, and evaluated values.

Details

Traces

trace 01 · runtimeTrace an Expression Through a CompilerFollow a small arithmetic expression from characters to tokens, syntax tree, checked representation, and executable form.

Interviews

medium · t2What Does a Compiler Do Before Generating Code?A language implementation prompt about tokens, syntax trees, semantic checks, intermediate representations, and runtime choices.

Explore adjacent

computer systems runtime execution programming algorithms lexing and parsing bytecode and virtual machines jit compilation

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