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WeAreDevelopers LIVE • Mar 3, 2021

Building a Compiler with C#

Florian Rappl

When mathematically driven games hit processing limits, standard engines failed. Discover how building a custom C# expression compiler unlocked execution speeds two magnitudes faster.

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#1 about 2 min

Evolution of custom compilers and virtual machines

Iterative architectural development allows compiler and virtual machine bases to achieve high code readability.

#2 about 5 min

Exposing compiler APIs with the Roslyn platform

Providing language services directly from the compiler engine enables deep syntax integration inside advanced IDEs.

#3 about 2 min

Transpiling target code into intermediate language sequences

Directly converting source expressions into intermediate language visualizes the structural translation logic applied by core runtime environments.

#4 about 5 min

Accelerating dynamic mathematical expression parsing inside games

Evaluating complex formulas within restricted game loop states requires dedicated expression parsers optimized for extreme execution speeds.

#5 about 3 min

Formalizing grammar rules for new programming languages

Defining strict syntax boundaries identifies exactly how incoming text inputs should map into valid language implementations.

#6 about 5 min

Navigating the traditional source code compilation pipeline

Transforming high-level code into executable binaries involves staged analysis formats that separate frontend concepts from target machine instructions.

#7 about 5 min

Decoding character streams into parseable syntax blocks

Normalizing continuous byte inputs into tokenized keyword definitions produces the minimal distinct fragments necessary for semantic evaluation.

#8 about 6 min

Structuring interpreted execution order with syntax trees

Transforming isolated tokens into hierarchical trees organizes nested expressions and discrete statements correctly according to mathematical precedence.

#9 about 3 min

Traversing syntax trees safely with visitor patterns

Applying standardized tree walking behaviors simplifies extending node investigations without breaking unhandled structural expression variations.

#10 about 3 min

Inspecting live node hierarchies via customized terminal REPLs

Typing uncompiled commands directly into iterative console interfaces provides immediate feedback regarding function assignments and parsed runtime blocks.

#11 about 3 min

Managing complex operation sequence weights using recursive parsing

Wrapping grouped operators inside separate nested functions allows the unrolling call stack to naturally process and sequence precedence logic.

#12 about 4 min

Generating linear evaluation outputs for process virtual machines

Converting deeply nested syntax structures back into flattened instruction streams readies logic blocks for isolated and stable interpreter execution.

Matching moments

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2:31 min

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Chris Heilmann +1 · LIVE

3:18 min

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Steven Giesel Steven Giesel · WWC 2025

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