'Type expressions' presentation slideshows

Compiler Construction

Compiler Construction. Lecture 9 Type Checking. Type Checking (Chapter 6). Type Checking. TYPE CHECKING is the main activity in semantic analysis. Goal: calculate and ensure consistency of the type of every expression in a program If there are type errors, we need to notify the user.

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CS412/413

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CSc 453 Semantic Analysis

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CSc 453 Semantic Analysis

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Pertemuan 18 & 19 Semantic Analyzer (type checking)

Pertemuan 18 & 19 Semantic Analyzer (type checking). Matakuliah : T0174 / Teknik Kompilasi Tahun : 2005 Versi : 1/6. Learning Outcomes. Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Mahasiswa dapat menjelaskan proses type checking dan peranannya dalam compiler (C2)

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Parameterization

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ML: a quasi-functional language with strong typing

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Type Checking

Type Checking. Legality checks Operator determination Overload resolution. Type as a synthesized attribute. Expr ::= Expr + Term if Etype (Expr 2 ) = Etype (Term) then Etype (Expr 1 ) := Etype (Expr 2 ); else Etype (Expr1) = Any_Type;

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Topic #6: Type Checking

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Type Checking

Type Checking. Legality checks Operator determination Overload resolution. Type as a synthesized attribute. Expr ::= Expr + Term if Etype (Expr 2 ) = Etype (Term) then Etype (Expr 1 ) := Etype (Expr 2 ); else Etype (Expr1) = Any_Type;

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Chapter 6 Type Checking Section 0 Overview

Chapter 6 Type Checking Section 0 Overview. 1.Static Checking Check that the source program follows both the syntactic and semantic conventions of the source language Examples of static check Type checks (incompatible operand) Flow-of-control checks (break statement)

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Type Checking

Type Checking. Aggelos Kiayias Computer Science & Engineering Department The University of Connecticut 371 Fairfield Road, Unit 1155 Storrs, CT 06269-1155. aggelos@cse.uconn.edu http://www.cse.uconn.edu/~akiayias. Static Checking.

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Chapter 6

Chapter 6. Type Checking. The compiler should report an error if an operator is applied to an incompatible operand. Type checking can be performed without running the program. It is a static check as opposed to a dynamic check which is performed during run time. Examples:

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More type systems

More type systems. Physical units. A unit expression is defined by following grammar u , v := b | 1 | u * v | u -1 where u , v are unit expressions themselves and b is a base unit: b := m | kg | s | A | K | cd | mol

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